MPC observations statistics

Please note, that you see here only the Top 15 of all objects, so the sum for all stations at end is higher.

SATOBS - Observations of natural satellites

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for SATOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 568 5625 262 21.47 1984 – 2023 40 Maunakea
2 T05 3129 10 312.90 2016 – 2025 10 ATLAS-HKO, Haleakala
3 T08 2841 11 258.27 2017 – 2025 9 ATLAS-MLO, Mauna Loa
4 T14 2630 219 12.01 2003 – 2023 21 Canada-France-Hawaii Telescope, Maunakea
5 415 2039 15 135.93 2004 – 2010 7 Kambah
6 704 1663 9 184.78 1998 – 2013 16 Lincoln Laboratory ETS, New Mexico
7 689 1306 8 163.25 1958 – 2012 55 U.S. Naval Observatory, Flagstaff
8 W68 1025 8 128.13 2022 – 2025 4 ATLAS Chile, Rio Hurtado
9 G36 985 11 89.55 2011 – 2022 12 Calar Alto-CASADO
10 691 662 15 44.13 1992 – 2021 30 Steward Observatory, Kitt Peak-Spacewatch
11 D29 644 13 49.54 2007 – 2025 19 Purple Mountain Observatory, XuYi Station
12 W84 630 37 17.03 2013 – 2022 10 Cerro Tololo-DECam
13 F51 600 24 25.00 2011 – 2024 14 Pan-STARRS 1, Haleakala
14 304 598 72 8.31 2002 – 2023 22 Las Campanas Observatory
15 711 584 10 58.40 1942 – 1995 54 McDonald Observatory, Fort Davis
Sum 167 35047 359 97.62 1894 – 2025 132 167 names

SATOBS - Observations of natural satellites

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for SATOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 568 5625 262 21.47 1984 – 2023 40 Maunakea
2 T14 2630 219 12.01 2003 – 2023 21 Canada-France-Hawaii Telescope, Maunakea
3 807 482 85 5.67 1998 – 2022 25 Cerro Tololo Observatory, La Serena
4 304 598 72 8.31 2002 – 2023 22 Las Campanas Observatory
5 675 444 46 9.65 1974 – 2011 38 Palomar Mountain
6 W84 630 37 17.03 2013 – 2022 10 Cerro Tololo-DECam
7 695 157 29 5.41 1969 – 2014 46 Kitt Peak
8 F51 600 24 25.00 2011 – 2024 14 Pan-STARRS 1, Haleakala
9 809 180 22 8.18 1981 – 2013 33 European Southern Observatory, La Silla
10 309 136 21 6.48 2000 – 2022 23 Cerro Paranal
11 950 78 19 4.11 1997 – 2011 15 La Palma
12 E07 559 17 32.88 2011 – 2015 5 Murrumbateman
13 G96 513 17 30.18 2005 – 2025 21 Mt. Lemmon Survey
14 691 662 15 44.13 1992 – 2021 30 Steward Observatory, Kitt Peak-Spacewatch
15 415 2039 15 135.93 2004 – 2010 7 Kambah
Sum 167 35047 359 97.62 1894 – 2025 132 167 names

SATOBS - Observations of natural satellites

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for SATOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 T05 3129 10 312.90 2016 – 2025 10 ATLAS-HKO, Haleakala
2 T08 2841 11 258.27 2017 – 2025 9 ATLAS-MLO, Mauna Loa
3 G80 217 1 217.00 2015 – 2015 1 Sierra Remote Observatories, Auberry
4 286 210 1 210.00 2003 – 2005 3 Yunnan Observatory
5 704 1663 9 184.78 1998 – 2013 16 Lincoln Laboratory ETS, New Mexico
6 689 1306 8 163.25 1958 – 2012 55 U.S. Naval Observatory, Flagstaff
7 415 2039 15 135.93 2004 – 2010 7 Kambah
8 W68 1025 8 128.13 2022 – 2025 4 ATLAS Chile, Rio Hurtado
9 337 115 1 115.00 2003 – 2004 2 Sheshan
10 G36 985 11 89.55 2011 – 2022 12 Calar Alto-CASADO
11 511 170 2 85.00 1998 – 1999 2 Haute Provence
12 P07 554 7 79.14 2021 – 2024 4 Space Surveillance Telescope, HEH Station
13 662 313 5 62.60 1904 – 1969 66 Lick Observatory, Mount Hamilton
14 G45 427 7 61.00 2014 – 2016 3 Space Surveillance Telescope, Atom Site
15 711 584 10 58.40 1942 – 1995 54 McDonald Observatory, Fort Davis
Sum 167 35047 359 97.62 1894 – 2025 132 167 names

SATOBS - Observations of natural satellites

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for SATOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 802 1 1 1.00 1894 – 1894 1 Harvard Observatory, Cambridge
2 800 16 2 8.00 1898 – 1899 2 Harvard Observatory, Arequipa
3 662 313 5 62.60 1904 – 1969 66 Lick Observatory, Mount Hamilton
4 754 75 4 18.75 1904 – 1955 52 Yerkes Observatory, Williams Bay
5 786 47 1 47.00 1905 – 1927 23 U.S. Naval Obs., Washington (since 1893)
6 000 180 4 45.00 1906 – 1910 5 Greenwich
7 024 14 3 4.67 1908 – 1909 2 Heidelberg-Konigstuhl
8 087 22 1 22.00 1911 – 1911 1 Helwan
9 672 199 8 24.88 1916 – 1951 36 Mount Wilson
10 690 23 3 7.67 1929 – 1981 53 Lowell Observatory, Flagstaff
11 094 1 1 1.00 1929 – 1929 1 Crimea-Simeiz
12 078 1 1 1.00 1935 – 1935 1 Johannesburg
13 822 17 2 8.50 1939 – 1952 14 Cordoba
14 711 584 10 58.40 1942 – 1995 54 McDonald Observatory, Fort Davis
15 074 8 1 8.00 1957 – 1957 1 Boyden Observatory, Bloemfontein
Sum 167 35047 359 97.62 1894 – 2025 132 167 names

SATOBS - Observations of natural satellites

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for SATOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 662 313 5 62.60 1904 – 1969 66 Lick Observatory, Mount Hamilton
2 689 1306 8 163.25 1958 – 2012 55 U.S. Naval Observatory, Flagstaff
3 711 584 10 58.40 1942 – 1995 54 McDonald Observatory, Fort Davis
4 690 23 3 7.67 1929 – 1981 53 Lowell Observatory, Flagstaff
5 754 75 4 18.75 1904 – 1955 52 Yerkes Observatory, Williams Bay
6 673 459 9 51.00 1968 – 2017 50 Table Mountain Observatory, Wrightwood
7 695 157 29 5.41 1969 – 2014 46 Kitt Peak
8 568 5625 262 21.47 1984 – 2023 40 Maunakea
9 675 444 46 9.65 1974 – 2011 38 Palomar Mountain
10 688 11 6 1.83 1982 – 2017 36 Lowell Observatory, Anderson Mesa Station
11 672 199 8 24.88 1916 – 1951 36 Mount Wilson
12 693 25 6 4.17 1967 – 2000 34 Catalina Station, Tucson
13 809 180 22 8.18 1981 – 2013 33 European Southern Observatory, La Silla
14 691 662 15 44.13 1992 – 2021 30 Steward Observatory, Kitt Peak-Spacewatch
15 807 482 85 5.67 1998 – 2022 25 Cerro Tololo Observatory, La Serena
Sum 167 35047 359 97.62 1894 – 2025 132 167 names

ARTSAT - Observations of artifical satellites

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for ARTSAT class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 C40 9626 2 4813.00 2012 – 2017 6 Kuban State University Astrophysical Observatory
2 H06 4740 16 296.25 2005 – 2018 14 iTelescope Observatory, Mayhill
3 Y00 2484 121 20.53 2014 – 2018 5 SONEAR Observatory, Oliveira
4 703 2194 60 36.57 2003 – 2018 16 Catalina Sky Survey
5 Q62 1662 9 184.67 2013 – 2018 6 iTelescope Observatory, Siding Spring
6 J95 1485 45 33.00 2002 – 2018 17 Great Shefford
7 G45 1271 1 1271.00 2015 – 2015 1 Space Surveillance Telescope, Atom Site
8 G96 971 47 20.66 2005 – 2018 14 Mt. Lemmon Survey
9 C41 823 2 411.50 2014 – 2015 2 MASTER-II Observatory, Kislovodsk
10 J75 793 13 61.00 2007 – 2013 7 OAM Observatory, La Sagra
11 E12 552 28 19.71 2004 – 2012 9 Siding Spring Survey
12 510 462 2 231.00 2011 – 2015 5 Siegen
13 Z66 363 2 181.50 2015 – 2018 4 DeSS Deimos Sky Survey, Niefla Mountain
14 620 276 4 69.00 2002 – 2008 7 Observatorio Astronomico de Mallorca
15 C95 266 7 38.00 2013 – 2018 6 SATINO Remote Observatory, Haute Provence
Sum 195 34172 199 171.72 2000 – 2018 19 195 names

ARTSAT - Observations of artifical satellites

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for ARTSAT class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 Y00 2484 121 20.53 2014 – 2018 5 SONEAR Observatory, Oliveira
2 703 2194 60 36.57 2003 – 2018 16 Catalina Sky Survey
3 G96 971 47 20.66 2005 – 2018 14 Mt. Lemmon Survey
4 J95 1485 45 33.00 2002 – 2018 17 Great Shefford
5 E12 552 28 19.71 2004 – 2012 9 Siding Spring Survey
6 H01 200 19 10.53 2007 – 2018 12 Magdalena Ridge Observatory, Socorro
7 F51 262 17 15.41 2010 – 2018 9 Pan-STARRS 1, Haleakala
8 204 131 17 7.71 2006 – 2018 13 Schiaparelli Observatory
9 H06 4740 16 296.25 2005 – 2018 14 iTelescope Observatory, Mayhill
10 J75 793 13 61.00 2007 – 2013 7 OAM Observatory, La Sagra
11 291 79 13 6.08 2006 – 2018 13 LPL/Spacewatch II
12 I52 80 12 6.67 2015 – 2018 4 Steward Observatory, Mt. Lemmon Station
13 F85 157 11 14.27 2007 – 2009 3 Tiki Observatory, Punaauia
14 300 88 9 9.78 2000 – 2015 16 Bisei Spaceguard Center-BATTeRS
15 Q62 1662 9 184.67 2013 – 2018 6 iTelescope Observatory, Siding Spring
Sum 195 34172 199 171.72 2000 – 2018 19 195 names

ARTSAT - Observations of artifical satellites

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for ARTSAT class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 C40 9626 2 4813.00 2012 – 2017 6 Kuban State University Astrophysical Observatory
2 G45 1271 1 1271.00 2015 – 2015 1 Space Surveillance Telescope, Atom Site
3 C41 823 2 411.50 2014 – 2015 2 MASTER-II Observatory, Kislovodsk
4 H06 4740 16 296.25 2005 – 2018 14 iTelescope Observatory, Mayhill
5 561 260 1 260.00 2010 – 2011 2 Piszkesteto Stn. (Konkoly)
6 510 462 2 231.00 2011 – 2015 5 Siegen
7 Q62 1662 9 184.67 2013 – 2018 6 iTelescope Observatory, Siding Spring
8 Z66 363 2 181.50 2015 – 2018 4 DeSS Deimos Sky Survey, Niefla Mountain
9 033 96 1 96.00 2014 – 2015 2 Karl Schwarzschild Observatory, Tautenburg
10 565 81 1 81.00 2011 – 2011 1 Bassano Bresciano
11 C32 78 1 78.00 2011 – 2011 1 Ka-Dar Observatory, TAU Station, Nizhny Arkhyz
12 620 276 4 69.00 2002 – 2008 7 Observatorio Astronomico de Mallorca
13 J75 793 13 61.00 2007 – 2013 7 OAM Observatory, La Sagra
14 168 61 1 61.00 2014 – 2014 1 Kourovskaya
15 958 182 3 60.67 2013 – 2014 2 Observatoire de Dax
Sum 195 34172 199 171.72 2000 – 2018 19 195 names

ARTSAT - Observations of artifical satellites

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for ARTSAT class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 413 112 6 18.67 2000 – 2005 6 Siding Spring Observatory
2 300 88 9 9.78 2000 – 2015 16 Bisei Spaceguard Center-BATTeRS
3 422 25 3 8.33 2000 – 2003 4 Loomberah
4 046 15 1 15.00 2001 – 2001 1 Klet Observatory, Ceske Budejovice
5 734 44 3 14.67 2001 – 2007 7 Farpoint Observatory, Eskridge
6 649 37 3 12.33 2001 – 2004 4 Powell Observatory, Louisburg
7 151 10 1 10.00 2001 – 2001 1 Eschenberg Observatory, Winterthur
8 817 10 1 10.00 2001 – 2001 1 Sudbury
9 611 171 8 21.38 2001 – 2009 9 Starkenburg Sternwarte, Heppenheim
10 691 74 8 9.25 2001 – 2018 18 Steward Observatory, Kitt Peak-Spacewatch
11 557 213 6 35.50 2001 – 2015 15 Ondrejov
12 587 41 5 8.20 2001 – 2010 10 Sormano
13 670 8 1 8.00 2001 – 2001 1 Camarillo
14 596 8 1 8.00 2001 – 2001 1 Colleverde di Guidonia
15 859 19 3 6.33 2001 – 2004 4 Wykrota Observatory-CEAMIG
Sum 195 34172 199 171.72 2000 – 2018 19 195 names

ARTSAT - Observations of artifical satellites

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for ARTSAT class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 691 74 8 9.25 2001 – 2018 18 Steward Observatory, Kitt Peak-Spacewatch
2 595 41 7 5.86 2001 – 2018 18 Farra d'Isonzo
3 926 41 7 5.86 2001 – 2017 17 Tenagra II Observatory, Nogales
4 J95 1485 45 33.00 2002 – 2018 17 Great Shefford
5 300 88 9 9.78 2000 – 2015 16 Bisei Spaceguard Center-BATTeRS
6 703 2194 60 36.57 2003 – 2018 16 Catalina Sky Survey
7 557 213 6 35.50 2001 – 2015 15 Ondrejov
8 900 30 7 4.29 2001 – 2015 15 Moriyama
9 705 14 2 7.00 2004 – 2018 15 Apache Point
10 G96 971 47 20.66 2005 – 2018 14 Mt. Lemmon Survey
11 H06 4740 16 296.25 2005 – 2018 14 iTelescope Observatory, Mayhill
12 970 40 5 8.00 2005 – 2017 13 Chelmsford
13 246 26 3 8.67 2005 – 2017 13 Klet Observatory-KLENOT
14 204 131 17 7.71 2006 – 2018 13 Schiaparelli Observatory
15 291 79 13 6.08 2006 – 2018 13 LPL/Spacewatch II
Sum 195 34172 199 171.72 2000 – 2018 19 195 names

CMTOBS - Observations of comets

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for CMTOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 T05 46040 592 77.77 2015 – 2025 11 ATLAS-HKO, Haleakala
2 T08 42453 544 78.04 2017 – 2025 9 ATLAS-MLO, Mauna Loa
3 249 37004 1991 18.59 1996 – 2025 30 SOHO
4 585 34417 584 58.93 1986 – 2025 40 Kyiv comet station
5 C23 31411 575 54.63 2010 – 2025 16 Olmen
6 349 30577 1024 29.86 1999 – 2025 27 Ageo
7 703 29104 928 31.36 1998 – 2025 28 Catalina Sky Survey
8 A77 27087 885 30.61 2005 – 2025 21 Observatoire Chante-Perdrix, Dauban
9 704 25898 671 38.60 1996 – 2013 18 Lincoln Laboratory ETS, New Mexico
10 G96 25651 1120 22.90 2004 – 2025 22 Mt. Lemmon Survey
11 F51 24653 1121 21.99 2009 – 2025 17 Pan-STARRS 1, Haleakala
12 W68 22848 244 93.64 2022 – 2025 4 ATLAS Chile, Rio Hurtado
13 H45 22267 406 54.84 2005 – 2025 21 Arkansas Sky Obs., Petit Jean Mountain South
14 I81 21663 462 46.89 2011 – 2025 15 Tarbatness Observatory, Portmahomack
15 213 20647 743 27.79 2001 – 2025 25 Observatorio Montcabre
Sum 1695 1508175 4748 317.64 1647 – 2025 379 1695 names

CMTOBS - Observations of comets

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for CMTOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 249 37004 1991 18.59 1996 – 2025 30 SOHO
2 215 13884 1342 10.35 2001 – 2025 25 Buchloe
3 F51 24653 1121 21.99 2009 – 2025 17 Pan-STARRS 1, Haleakala
4 G96 25651 1120 22.90 2004 – 2025 22 Mt. Lemmon Survey
5 349 30577 1024 29.86 1999 – 2025 27 Ageo
6 H06 12797 968 13.22 2004 – 2024 21 iTelescope Observatory, Mayhill
7 204 7827 930 8.42 2001 – 2025 25 Schiaparelli Observatory
8 703 29104 928 31.36 1998 – 2025 28 Catalina Sky Survey
9 A77 27087 885 30.61 2005 – 2025 21 Observatoire Chante-Perdrix, Dauban
10 372 8703 879 9.90 1973 – 2023 51 Geisei
11 Q62 12574 839 14.99 2012 – 2025 14 iTelescope Observatory, Siding Spring
12 213 20647 743 27.79 2001 – 2025 25 Observatorio Montcabre
13 900 11157 714 15.63 1991 – 2025 35 Moriyama
14 A71 9624 712 13.52 2005 – 2025 21 Stixendorf
15 F52 11496 704 16.33 2015 – 2025 11 Pan-STARRS 2, Haleakala
Sum 1695 1508175 4748 317.64 1647 – 2025 379 1695 names

CMTOBS - Observations of comets

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for CMTOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 C57 10230 19 538.42 2018 – 2025 8 TESS
2 G39 4947 31 159.58 2014 – 2021 8 ROAD, San Pedro de Atacama
3 J92 138 1 138.00 2004 – 2004 1 Beaconsfield
4 134 6034 51 118.31 2013 – 2025 13 Groszschwabhausen
5 708 351 3 117.00 1906 – 1911 6 Chamberlin Observatory, Denver
6 C40 9655 90 107.28 2012 – 2025 14 Kuban State University Astrophysical Observatory
7 190 3646 35 104.17 1969 – 2024 56 Gissar
8 I08 104 1 104.00 2011 – 2011 1 Alianza S4, Cerro Burek
9 A46 9089 89 102.12 2002 – 2006 5 Lelekovice
10 334 204 2 102.00 1973 – 1986 14 Tsingtao
11 K81 2946 29 101.59 2018 – 2023 6 P.M.P.H.R. Deep Sky Observatory, Atina
12 I80 97 1 97.00 2019 – 2019 1 Rose Cottage Observatory, Keighley
13 W68 22848 244 93.64 2022 – 2025 4 ATLAS Chile, Rio Hurtado
14 L28 265 3 88.33 2018 – 2023 6 ISON-Castelgrande Observatory
15 813 79 1 79.00 1909 – 1910 2 Santiago-Quinta Normal (1862-1920)
Sum 1695 1508175 4748 317.64 1647 – 2025 379 1695 names

CMTOBS - Observations of comets

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for CMTOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 500 256 49 5.22 1647 – 1994 348 Geocentric
2 A51 35 1 35.00 1661 – 1661 1 Danzig
3 324 17 4 4.25 1737 – 1985 249 Peking Observatory, Shaho Station
4 007 213 24 8.88 1819 – 1935 117 Paris
5 281 2 1 2.00 1819 – 1819 1 Bologna
6 027 41 7 5.86 1820 – 1923 104 Milan
7 030 534 39 13.69 1827 – 1919 93 Arcetri Observatory, Florence
8 282 1 1 1.00 1827 – 1827 1 Nimes
9 524 32 4 8.00 1835 – 1969 135 Mannheim
10 548 76 10 7.60 1835 – 1910 76 Berlin (1835-1913)
11 058 236 20 11.80 1835 – 1936 102 Kaliningrad
12 075 119 21 5.67 1835 – 1985 151 Tartu
13 051 465 22 21.14 1836 – 1987 152 Royal Observatory, Cape of Good Hope
14 787 54 9 6.00 1846 – 1896 51 U.S. Naval Obs., Washington (before 1893)
15 533 217 23 9.43 1846 – 1921 76 Padua
Sum 1695 1508175 4748 317.64 1647 – 2025 379 1695 names

CMTOBS - Observations of comets

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for CMTOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 500 256 49 5.22 1647 – 1994 348 Geocentric
2 324 17 4 4.25 1737 – 1985 249 Peking Observatory, Shaho Station
3 051 465 22 21.14 1836 – 1987 152 Royal Observatory, Cape of Good Hope
4 075 119 21 5.67 1835 – 1985 151 Tartu
5 503 222 40 5.55 1846 – 1993 148 Cambridge
6 797 26 3 8.67 1879 – 2022 144 Yale Observatory, New Haven
7 189 114 17 6.71 1880 – 2019 140 Geneva (before 1967)
8 089 1890 59 32.03 1882 – 2021 140 Mykolaiv
9 524 32 4 8.00 1835 – 1969 135 Mannheim
10 822 759 45 16.87 1885 – 2019 135 Cordoba
11 084 2245 56 40.09 1877 – 2007 131 Pulkovo
12 541 42 8 5.25 1887 – 2017 131 Prague
13 995 33 3 11.00 1870 – 1997 128 Durham
14 247 824 120 6.87 1901 – 2025 125 Roving Observer
15 662 1324 124 10.68 1888 – 2007 120 Lick Observatory, Mount Hamilton
Sum 1695 1508175 4748 317.64 1647 – 2025 379 1695 names

UNNOBS - Observations of unnumbered minor planets

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for UNNOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 8844145 541518 16.33 2008 – 2025 18 Pan-STARRS 1, Haleakala
2 G96 5489461 448918 12.23 2004 – 2025 22 Mt. Lemmon Survey
3 F52 3830390 410905 9.32 2015 – 2025 11 Pan-STARRS 2, Haleakala
4 W84 1523952 109128 13.96 2012 – 2025 14 Cerro Tololo-DECam
5 691 575224 119683 4.81 1985 – 2025 41 Steward Observatory, Kitt Peak-Spacewatch
6 V00 528313 107907 4.90 2016 – 2025 10 Kitt Peak-Bok
7 T09 350906 40474 8.67 2002 – 2025 24 Subaru Telescope, Maunakea
8 X05 344195 2191 157.09 2024 – 2025 2 Simonyi Survey Telescope, Rubin Observatory
9 D29 208129 40556 5.13 2006 – 2025 20 Purple Mountain Observatory, XuYi Station
10 I52 194405 21771 8.93 2012 – 2025 14 Steward Observatory, Mt. Lemmon Station
11 703 193942 24525 7.91 1998 – 2025 28 Catalina Sky Survey
12 O18 189505 30945 6.12 2023 – 2025 3 WFST, Lenghu
13 C51 159469 14734 10.82 2010 – 2024 15 WISE
14 H21 156690 21934 7.14 2009 – 2025 17 Astronomical Research Observatory, Westfield
15 I41 145934 15118 9.65 2002 – 2025 24 Palomar Mountain--ZTF
Sum 1298 24939193 668098 37.33 1873 – 2025 153 1298 names

UNNOBS - Observations of unnumbered minor planets

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for UNNOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 8844145 541518 16.33 2008 – 2025 18 Pan-STARRS 1, Haleakala
2 G96 5489461 448918 12.23 2004 – 2025 22 Mt. Lemmon Survey
3 F52 3830390 410905 9.32 2015 – 2025 11 Pan-STARRS 2, Haleakala
4 691 575224 119683 4.81 1985 – 2025 41 Steward Observatory, Kitt Peak-Spacewatch
5 W84 1523952 109128 13.96 2012 – 2025 14 Cerro Tololo-DECam
6 V00 528313 107907 4.90 2016 – 2025 10 Kitt Peak-Bok
7 D29 208129 40556 5.13 2006 – 2025 20 Purple Mountain Observatory, XuYi Station
8 T09 350906 40474 8.67 2002 – 2025 24 Subaru Telescope, Maunakea
9 O18 189505 30945 6.12 2023 – 2025 3 WFST, Lenghu
10 291 134318 28689 4.68 2001 – 2025 25 LPL/Spacewatch II
11 807 130913 26002 5.03 1988 – 2025 38 Cerro Tololo Observatory, La Serena
12 703 193942 24525 7.91 1998 – 2025 28 Catalina Sky Survey
13 H21 156690 21934 7.14 2009 – 2025 17 Astronomical Research Observatory, Westfield
14 I52 194405 21771 8.93 2012 – 2025 14 Steward Observatory, Mt. Lemmon Station
15 568 138225 20186 6.85 1993 – 2023 31 Maunakea
Sum 1298 24939193 668098 37.33 1873 – 2025 153 1298 names

UNNOBS - Observations of unnumbered minor planets

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for UNNOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 L50 296 1 296.00 2019 – 2019 1 GenShtab Observatory, Nauchnyi
2 A84 1244 7 177.71 2002 – 2013 12 TUBITAK National Observatory
3 I27 1199 7 171.29 2011 – 2015 5 Barred Owl Observatory, Carp
4 E09 162 1 162.00 2008 – 2008 1 Oakley Southern Sky Observatory, Coonabarabran
5 X05 344195 2191 157.09 2024 – 2025 2 Simonyi Survey Telescope, Rubin Observatory
6 C20 1601 12 133.42 2009 – 2023 15 Kislovodsk Mtn. Astronomical Stn., Pulkovo Obs.
7 C57 16384 199 82.33 2018 – 2021 4 TESS
8 B30 236 4 59.00 2007 – 2007 1 Szamotuly-Galowo
9 134 56 1 56.00 2017 – 2017 1 Groszschwabhausen
10 H78 216 4 54.00 2010 – 2015 6 University of Narino Observatory, Pasto
11 Z01 160 3 53.33 2023 – 2025 3 OWL-Net, Oukaimeden
12 I50 104 2 52.00 2012 – 2012 1 P2 Observatory, Mayhill
13 C54 98 2 49.00 2020 – 2020 1 New Horizons
14 Z73 98 2 49.00 2015 – 2017 3 Observatorio Nuevos Horizontes, Camas
15 W08 46 1 46.00 2017 – 2017 1 Jimginny Observatory, Naperville
Sum 1298 24939193 668098 37.33 1873 – 2025 153 1298 names

UNNOBS - Observations of unnumbered minor planets

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for UNNOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 767 1 1 1.00 1873 – 1873 1 Ann Arbor
2 787 1 1 1.00 1874 – 1874 1 U.S. Naval Obs., Washington (before 1893)
3 548 1 1 1.00 1878 – 1878 1 Berlin (1835-1913)
4 045 3 3 1.00 1890 – 1940 51 Vienna (since 1879)
5 024 1274 749 1.70 1891 – 2013 123 Heidelberg-Konigstuhl
6 007 1 1 1.00 1892 – 1892 1 Paris
7 537 1 1 1.00 1898 – 1898 1 Urania Observatory, Berlin
8 800 20 20 1.00 1899 – 1922 24 Harvard Observatory, Arequipa
9 786 6 4 1.50 1903 – 1996 94 U.S. Naval Obs., Washington (since 1893)
10 690 65 48 1.35 1906 – 1961 56 Lowell Observatory, Flagstaff
11 803 25 22 1.14 1906 – 1910 5 Taunton
12 084 1063 80 13.29 1906 – 2023 118 Pulkovo
13 078 178 166 1.07 1911 – 1954 44 Johannesburg
14 662 66 28 2.36 1911 – 2004 94 Lick Observatory, Mount Hamilton
15 799 27 27 1.00 1912 – 1914 3 Winchester
Sum 1298 24939193 668098 37.33 1873 – 2025 153 1298 names

UNNOBS - Observations of unnumbered minor planets

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for UNNOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 024 1274 749 1.70 1891 – 2013 123 Heidelberg-Konigstuhl
2 084 1063 80 13.29 1906 – 2023 118 Pulkovo
3 094 434 216 2.01 1912 – 2025 114 Crimea-Simeiz
4 006 147 30 4.90 1914 – 2022 109 Fabra Observatory, Barcelona
5 754 533 134 3.98 1924 – 2018 95 Yerkes Observatory, Williams Bay
6 662 66 28 2.36 1911 – 2004 94 Lick Observatory, Mount Hamilton
7 786 6 4 1.50 1903 – 1996 94 U.S. Naval Obs., Washington (since 1893)
8 012 922 469 1.97 1924 – 2013 90 Uccle
9 119 95 54 1.76 1938 – 2021 84 Abastuman
10 073 600 95 6.32 1943 – 2025 83 Bucharest
11 186 246 31 7.94 1942 – 2023 82 Kitab
12 672 4 3 1.33 1926 – 2003 78 Mount Wilson
13 675 1423 440 3.23 1952 – 2025 74 Palomar Mountain
14 711 8005 1984 4.03 1950 – 2021 72 McDonald Observatory, Fort Davis
15 056 30 7 4.29 1954 – 2025 72 Skalnate Pleso
Sum 1298 24939193 668098 37.33 1873 – 2025 153 1298 names

ITF - Observations of tracklets (1-night objects)

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for ITF class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 2956252 878156 3.37 2009 – 2025 17 Pan-STARRS 1, Haleakala
2 W84 1281412 228592 5.61 2002 – 2025 24 Cerro Tololo-DECam
3 G96 1163339 302609 3.84 2004 – 2025 22 Mt. Lemmon Survey
4 F52 1064884 319753 3.33 2014 – 2025 12 Pan-STARRS 2, Haleakala
5 T09 812333 199542 4.07 2002 – 2025 24 Subaru Telescope, Maunakea
6 V00 390905 101279 3.86 2016 – 2025 10 Kitt Peak-Bok
7 691 268190 88469 3.03 1990 – 2024 35 Steward Observatory, Kitt Peak-Spacewatch
8 703 114588 34863 3.29 1998 – 2025 28 Catalina Sky Survey
9 644 105040 35089 2.99 2001 – 2010 10 Palomar Mountain/NEAT
10 699 89139 27085 3.29 1998 – 2008 11 Lowell Observatory-LONEOS
11 568 69813 18005 3.88 1993 – 2022 30 Maunakea
12 695 66775 31207 2.14 1995 – 2025 31 Kitt Peak
13 807 65384 31661 2.07 1997 – 2025 29 Cerro Tololo Observatory, La Serena
14 O18 51137 14042 3.64 2023 – 2025 3 WFST, Lenghu
15 309 44931 5327 8.43 2000 – 2024 25 Cerro Paranal
Sum 809 8880624 2419105 3.67 1950 – 2025 76 809 names

ITF - Observations of tracklets (1-night objects)

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for ITF class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 2956252 878156 3.37 2009 – 2025 17 Pan-STARRS 1, Haleakala
2 F52 1064884 319753 3.33 2014 – 2025 12 Pan-STARRS 2, Haleakala
3 G96 1163339 302609 3.84 2004 – 2025 22 Mt. Lemmon Survey
4 W84 1281412 228592 5.61 2002 – 2025 24 Cerro Tololo-DECam
5 T09 812333 199542 4.07 2002 – 2025 24 Subaru Telescope, Maunakea
6 V00 390905 101279 3.86 2016 – 2025 10 Kitt Peak-Bok
7 691 268190 88469 3.03 1990 – 2024 35 Steward Observatory, Kitt Peak-Spacewatch
8 644 105040 35089 2.99 2001 – 2010 10 Palomar Mountain/NEAT
9 703 114588 34863 3.29 1998 – 2025 28 Catalina Sky Survey
10 807 65384 31661 2.07 1997 – 2025 29 Cerro Tololo Observatory, La Serena
11 695 66775 31207 2.14 1995 – 2025 31 Kitt Peak
12 699 89139 27085 3.29 1998 – 2008 11 Lowell Observatory-LONEOS
13 568 69813 18005 3.88 1993 – 2022 30 Maunakea
14 O18 51137 14042 3.64 2023 – 2025 3 WFST, Lenghu
15 645 27305 13348 2.05 1998 – 2009 12 Apache Point-Sloan Digital Sky Survey
Sum 809 8880624 2419105 3.67 1950 – 2025 76 809 names

ITF - Observations of tracklets (1-night objects)

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for ITF class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 D08 60 1 60.00 2013 – 2013 1 Ghezz Observatory, Leontica
2 190 214 4 53.50 2013 – 2021 9 Gissar
3 N42 65 2 32.50 2014 – 2021 8 Tien-Shan Astronomical Observatory
4 181 28 1 28.00 2018 – 2018 1 Observatoire des Makes, Saint-Louis
5 A84 23 1 23.00 2005 – 2005 1 TUBITAK National Observatory
6 258 1271 59 21.54 2018 – 2022 5 Gaia
7 O49 21 1 21.00 2020 – 2020 1 Purple Mountain Observatory, Yaoan Station
8 B41 18 1 18.00 2018 – 2018 1 Zlin Observatory
9 169 16 1 16.00 2012 – 2012 1 Airali Observatory
10 W79 30 2 15.00 2021 – 2021 1 Cerro Tololo-LCO Aqawan B #1
11 740 66 5 13.20 2004 – 2004 1 SFA Observatory, Nacogdoches
12 J70 13 1 13.00 2007 – 2008 2 Obs. Astronomico Vega del Thader, El Palmar
13 T03 13 1 13.00 2021 – 2021 1 Haleakala-LCO Clamshell #3
14 D89 12 1 12.00 2011 – 2011 1 Yamagata
15 Z37 12 1 12.00 2020 – 2020 1 Northolt Branch Observatory 3, Blandford Forum
Sum 809 8880624 2419105 3.67 1950 – 2025 76 809 names

ITF - Observations of tracklets (1-night objects)

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for ITF class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 675 139 39 3.56 1950 – 2025 76 Palomar Mountain
2 261 52 26 2.00 1951 – 1998 48 Palomar Mountain-DSS
3 260 62 31 2.00 1974 – 1995 22 Siding Spring Observatory-DSS
4 413 161 66 2.44 1977 – 2007 31 Siding Spring Observatory
5 046 24 5 4.80 1982 – 2017 36 Klet Observatory, Ceske Budejovice
6 098 60 30 2.00 1983 – 1998 16 Asiago Observatory, Cima Ekar
7 809 3702 934 3.96 1988 – 2022 35 European Southern Observatory, La Silla
8 071 339 70 4.84 1988 – 2020 33 NAO Rozhen, Smolyan
9 691 268190 88469 3.03 1990 – 2024 35 Steward Observatory, Kitt Peak-Spacewatch
10 511 121 22 5.50 1991 – 2024 34 Haute Provence
11 095 1108 451 2.46 1991 – 2025 35 Crimea-Nauchnyi
12 808 461 227 2.03 1992 – 2000 9 El Leoncito
13 376 16 8 2.00 1992 – 1998 7 Uenohara
14 372 88 44 2.00 1992 – 2004 13 Geisei
15 670 8 3 2.67 1992 – 2024 33 Camarillo
Sum 809 8880624 2419105 3.67 1950 – 2025 76 809 names

ITF - Observations of tracklets (1-night objects)

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for ITF class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 675 139 39 3.56 1950 – 2025 76 Palomar Mountain
2 261 52 26 2.00 1951 – 1998 48 Palomar Mountain-DSS
3 046 24 5 4.80 1982 – 2017 36 Klet Observatory, Ceske Budejovice
4 809 3702 934 3.96 1988 – 2022 35 European Southern Observatory, La Silla
5 691 268190 88469 3.03 1990 – 2024 35 Steward Observatory, Kitt Peak-Spacewatch
6 095 1108 451 2.46 1991 – 2025 35 Crimea-Nauchnyi
7 511 121 22 5.50 1991 – 2024 34 Haute Provence
8 010 213 72 2.96 1992 – 2025 34 Caussols
9 670 8 3 2.67 1992 – 2024 33 Camarillo
10 071 339 70 4.84 1988 – 2020 33 NAO Rozhen, Smolyan
11 033 637 208 3.06 1993 – 2025 33 Karl Schwarzschild Observatory, Tautenburg
12 381 109 18 6.06 1993 – 2024 32 Tokyo-Kiso
13 413 161 66 2.44 1977 – 2007 31 Siding Spring Observatory
14 950 9852 2119 4.65 1994 – 2024 31 La Palma
15 303 29 15 1.93 1994 – 2024 31 OAN de Llano del Hato, Merida
Sum 809 8880624 2419105 3.67 1950 – 2025 76 809 names

NUMOBS - Observations of numbered objects

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for NUMOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 G96 72522541 872423 83.13 2004 – 2025 22 Mt. Lemmon Survey
2 F51 68779857 874594 78.64 2008 – 2025 18 Pan-STARRS 1, Haleakala
3 703 37443399 505049 74.14 1998 – 2025 28 Catalina Sky Survey
4 704 32764700 370733 88.38 1979 – 2013 35 Lincoln Laboratory ETS, New Mexico
5 F52 32657351 865278 37.74 2014 – 2025 12 Pan-STARRS 2, Haleakala
6 T05 32212222 294895 109.23 2015 – 2025 11 ATLAS-HKO, Haleakala
7 T08 31224071 304002 102.71 2014 – 2025 12 ATLAS-MLO, Mauna Loa
8 C57 21817620 42113 518.07 2018 – 2023 6 TESS
9 G45 17087299 390809 43.72 2011 – 2017 7 Space Surveillance Telescope, Atom Site
10 D29 15800064 605838 26.08 2006 – 2025 20 Purple Mountain Observatory, XuYi Station
11 I41 14816537 413211 35.86 2002 – 2025 24 Palomar Mountain--ZTF
12 691 13697888 727666 18.82 1984 – 2025 42 Steward Observatory, Kitt Peak-Spacewatch
13 W68 12905491 212394 60.76 2022 – 2025 4 ATLAS Chile, Rio Hurtado
14 M22 9396062 200513 46.86 2022 – 2025 4 ATLAS South Africa, Sutherland
15 P07 8405598 278770 30.15 2020 – 2025 6 Space Surveillance Telescope, HEH Station
Sum 2457 468638032 875150 535.49 1801 – 2025 225 2457 names

NUMOBS - Observations of numbered objects

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for NUMOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 68779857 874594 78.64 2008 – 2025 18 Pan-STARRS 1, Haleakala
2 G96 72522541 872423 83.13 2004 – 2025 22 Mt. Lemmon Survey
3 F52 32657351 865278 37.74 2014 – 2025 12 Pan-STARRS 2, Haleakala
4 691 13697888 727666 18.82 1984 – 2025 42 Steward Observatory, Kitt Peak-Spacewatch
5 D29 15800064 605838 26.08 2006 – 2025 20 Purple Mountain Observatory, XuYi Station
6 703 37443399 505049 74.14 1998 – 2025 28 Catalina Sky Survey
7 V00 2665345 429637 6.20 2016 – 2025 10 Kitt Peak-Bok
8 I41 14816537 413211 35.86 2002 – 2025 24 Palomar Mountain--ZTF
9 G45 17087299 390809 43.72 2011 – 2017 7 Space Surveillance Telescope, Atom Site
10 704 32764700 370733 88.38 1979 – 2013 35 Lincoln Laboratory ETS, New Mexico
11 644 4096785 323654 12.66 1990 – 2010 21 Palomar Mountain/NEAT
12 T08 31224071 304002 102.71 2014 – 2025 12 ATLAS-MLO, Mauna Loa
13 T05 32212222 294895 109.23 2015 – 2025 11 ATLAS-HKO, Haleakala
14 P07 8405598 278770 30.15 2020 – 2025 6 Space Surveillance Telescope, HEH Station
15 699 5382034 264900 20.32 1998 – 2008 11 Lowell Observatory-LONEOS
Sum 2457 468638032 875150 535.49 1801 – 2025 225 2457 names

NUMOBS - Observations of numbered objects

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for NUMOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 768 1966 2 983.00 1930 – 1934 5 Dearborn Observatory, Evanston (aft. Oct. 1939)
2 874 5699 7 814.14 1995 – 2025 31 Observatorio do Pico dos Dias, Itajuba
3 C57 21817620 42113 518.07 2018 – 2023 6 TESS
4 217 769 3 256.33 2021 – 2021 1 Assah
5 O44 453 2 226.50 2012 – 2013 2 Lijiang Station, Yunnan Observatories
6 708 398 2 199.00 1895 – 1908 14 Chamberlin Observatory, Denver
7 Z42 572 3 190.67 2017 – 2017 1 Rushay Farm Observatory, Sturminster Newton
8 X05 1864 11 169.45 2025 – 2025 1 Simonyi Survey Telescope, Rubin Observatory
9 W78 331 2 165.50 2017 – 2018 2 Clay Telescope, Harvard University
10 L98 5201 32 162.53 2017 – 2018 2 La Sagra Observatory, Puebla de Don Fadrique
11 R78 912 7 130.29 2024 – 2024 1 Crystal Lake Observatory, Ngutunui
12 270 8134 66 123.24 2021 – 2025 5 Unistellar Network, Roving Observer
13 C55 355 3 118.33 2016 – 2016 1 Kepler
14 248 5641 48 117.52 1989 – 1993 5 Hipparcos
15 778 1981 17 116.53 1935 – 1990 56 Allegheny Observatory, Pittsburgh
Sum 2457 468638032 875150 535.49 1801 – 2025 225 2457 names

NUMOBS - Observations of numbered objects

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for NUMOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 535 21 1 21.00 1801 – 1801 1 Palermo
2 500 2886 56 51.54 1802 – 2021 220 Geocentric
3 528 164 18 9.11 1804 – 1983 180 Gottingen
4 541 165 33 5.00 1804 – 2000 197 Prague
5 027 185 38 4.87 1804 – 1942 139 Milan
6 283 4 1 4.00 1804 – 1804 1 Bremen
7 058 347 61 5.69 1820 – 1939 120 Kaliningrad
8 548 609 88 6.92 1822 – 1898 77 Berlin (1835-1913)
9 527 82 10 8.20 1823 – 1861 39 Altona
10 969 15 3 5.00 1825 – 1852 28 London-Regents Park
11 524 17 3 5.67 1827 – 1834 8 Mannheim
12 533 687 102 6.74 1829 – 1923 95 Padua
13 503 134 16 8.38 1830 – 1989 160 Cambridge
14 062 8585 1800 4.77 1830 – 1957 128 Turku
15 961 4 1 4.00 1830 – 1830 1 City Observatory, Calton Hill, Edinburgh
Sum 2457 468638032 875150 535.49 1801 – 2025 225 2457 names

NUMOBS - Observations of numbered objects

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for NUMOBS class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 500 2886 56 51.54 1802 – 2021 220 Geocentric
2 541 165 33 5.00 1804 – 2000 197 Prague
3 528 164 18 9.11 1804 – 1983 180 Gottingen
4 084 23852 1096 21.76 1846 – 2013 168 Pulkovo
5 503 134 16 8.38 1830 – 1989 160 Cambridge
6 784 384 64 6.00 1866 – 2012 147 Stull Observatory, Alfred University
7 027 185 38 4.87 1804 – 1942 139 Milan
8 035 3029 110 27.54 1835 – 1970 136 Copenhagen
9 822 1673 233 7.18 1885 – 2020 136 Cordoba
10 062 8585 1800 4.77 1830 – 1957 128 Turku
11 055 244 89 2.74 1835 – 1957 123 Cracow
12 058 347 61 5.69 1820 – 1939 120 Kaliningrad
13 024 17173 2689 6.39 1891 – 2009 119 Heidelberg-Konigstuhl
14 013 5587 87 64.22 1864 – 1979 116 Leiden
15 070 138 56 2.46 1841 – 1954 114 Vilnius (before 1939)
Sum 2457 468638032 875150 535.49 1801 – 2025 225 2457 names

ALL - Observations of all objects together

Sorted by number of observations

Click at right image for a histogram of the top 15 values.
Number of observations of top 15 stations at Minor Planet Center for ALL class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 80605769 2295035 35.12 2008 – 2025 18 Pan-STARRS 1, Haleakala
2 G96 79202476 1624716 48.75 2004 – 2025 22 Mt. Lemmon Survey
3 703 37783448 565047 66.87 1998 – 2025 28 Catalina Sky Survey
4 F52 37564157 1596434 23.53 2014 – 2025 12 Pan-STARRS 2, Haleakala
5 704 32851035 376446 87.27 1979 – 2013 35 Lincoln Laboratory ETS, New Mexico
6 T05 32311294 300358 107.58 2015 – 2025 11 ATLAS-HKO, Haleakala
7 T08 31320923 309553 101.18 2014 – 2025 12 ATLAS-MLO, Mauna Loa
8 C57 21844245 42327 516.08 2018 – 2025 8 TESS
9 G45 17168492 397103 43.23 2011 – 2017 7 Space Surveillance Telescope, Atom Site
10 D29 16031478 652677 24.56 2006 – 2025 20 Purple Mountain Observatory, XuYi Station
11 I41 14973268 429977 34.82 2002 – 2025 24 Palomar Mountain--ZTF
12 691 14550133 936255 15.54 1984 – 2025 42 Steward Observatory, Kitt Peak-Spacewatch
13 W68 12946388 214120 60.46 2022 – 2025 4 ATLAS Chile, Rio Hurtado
14 M22 9426471 202112 46.64 2022 – 2025 4 ATLAS South Africa, Sutherland
15 P07 8440210 283276 29.80 2020 – 2025 6 Space Surveillance Telescope, HEH Station
Sum 2599 504035243 3964038 127.15 1647 – 2025 379 2599 names

ALL - Observations of all objects together

Sorted by number of observed objects

Click at right image for a histogram of the top 15 values.
Number of objects of top 15 stations at Minor Planet Center for ALL class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 F51 80605769 2295035 35.12 2008 – 2025 18 Pan-STARRS 1, Haleakala
2 G96 79202476 1624716 48.75 2004 – 2025 22 Mt. Lemmon Survey
3 F52 37564157 1596434 23.53 2014 – 2025 12 Pan-STARRS 2, Haleakala
4 691 14550133 936255 15.54 1984 – 2025 42 Steward Observatory, Kitt Peak-Spacewatch
5 D29 16031478 652677 24.56 2006 – 2025 20 Purple Mountain Observatory, XuYi Station
6 V00 3585501 638940 5.61 2016 – 2025 10 Kitt Peak-Bok
7 703 37783448 565047 66.87 1998 – 2025 28 Catalina Sky Survey
8 W84 5961056 562807 10.59 2002 – 2025 24 Cerro Tololo-DECam
9 I41 14973268 429977 34.82 2002 – 2025 24 Palomar Mountain--ZTF
10 G45 17168492 397103 43.23 2011 – 2017 7 Space Surveillance Telescope, Atom Site
11 704 32851035 376446 87.27 1979 – 2013 35 Lincoln Laboratory ETS, New Mexico
12 644 4231994 363808 11.63 1990 – 2010 21 Palomar Mountain/NEAT
13 T09 1656337 313389 5.29 2002 – 2025 24 Subaru Telescope, Maunakea
14 T08 31320923 309553 101.18 2014 – 2025 12 ATLAS-MLO, Mauna Loa
15 T05 32311294 300358 107.58 2015 – 2025 11 ATLAS-HKO, Haleakala
Sum 2599 504035243 3964038 127.15 1647 – 2025 379 2599 names

ALL - Observations of all objects together

Sorted by observations per object

Click at right image for a histogram of the top 15 values.
Part of observations per object of top 15 stations at Minor Planet Center for ALL class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 249 37004 15 2466.93 1996 – 2025 30 SOHO
2 768 1966 2 983.00 1930 – 1934 5 Dearborn Observatory, Evanston (aft. Oct. 1939)
3 C49 3069 5 613.80 2007 – 2025 19 STEREO-A
4 C57 21844245 42327 516.08 2018 – 2025 8 TESS
5 874 6206 18 344.78 1983 – 2025 43 Observatorio do Pico dos Dias, Itajuba
6 C50 1392 5 278.40 2007 – 2013 7 STEREO-B
7 G39 5044 24 210.17 2012 – 2021 10 ROAD, San Pedro de Atacama
8 217 797 4 199.25 1984 – 2021 38 Assah
9 Z42 572 3 190.67 2017 – 2017 1 Rushay Farm Observatory, Sturminster Newton
10 708 749 4 187.25 1895 – 1911 17 Chamberlin Observatory, Denver
11 A46 9181 54 170.02 2002 – 2006 5 Lelekovice
12 W78 331 2 165.50 2017 – 2018 2 Clay Telescope, Harvard University
13 L98 5201 32 162.53 2017 – 2018 2 La Sagra Observatory, Puebla de Don Fadrique
14 X05 346059 2202 157.16 2024 – 2025 2 Simonyi Survey Telescope, Rubin Observatory
15 R78 912 7 130.29 2024 – 2024 1 Crystal Lake Observatory, Ngutunui
Sum 2599 504035243 3964038 127.15 1647 – 2025 379 2599 names

ALL - Observations of all objects together

Sorted by first year of observation

Click at right image for a histogram of the top 15 values.
First year of observation of top 15 stations at Minor Planet Center for ALL class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 500 3144 64 49.13 1647 – 2021 375 Geocentric
2 A51 35 1 35.00 1661 – 1661 1 Danzig
3 324 22 5 4.40 1737 – 1985 249 Peking Observatory, Shaho Station
4 535 52 3 17.33 1801 – 1903 103 Palermo
5 541 211 39 5.41 1804 – 2017 214 Prague
6 027 226 43 5.26 1804 – 1942 139 Milan
7 528 243 21 11.57 1804 – 1986 183 Gottingen
8 283 4 1 4.00 1804 – 1804 1 Bremen
9 007 715 128 5.59 1819 – 1950 132 Paris
10 281 2 1 2.00 1819 – 1819 1 Bologna
11 058 583 73 7.99 1820 – 1939 120 Kaliningrad
12 548 686 94 7.30 1822 – 1910 89 Berlin (1835-1913)
13 527 91 12 7.58 1823 – 1871 49 Altona
14 969 15 3 5.00 1825 – 1852 28 London-Regents Park
15 282 8 2 4.00 1827 – 1858 32 Nimes
Sum 2599 504035243 3964038 127.15 1647 – 2025 379 2599 names

ALL - Observations of all objects together

Sorted by years span of observations

Click at right image for a histogram of the top 15 values.
Year range of observations of top 15 stations at Minor Planet Center for ALL class
Rank Station Observations Objects Observation per object Years of observation Years Station name
No. Code Number Number   Range span  
1 500 3144 64 49.13 1647 – 2021 375 Geocentric
2 324 22 5 4.40 1737 – 1985 249 Peking Observatory, Shaho Station
3 541 211 39 5.41 1804 – 2017 214 Prague
4 528 243 21 11.57 1804 – 1986 183 Gottingen
5 084 27160 1197 22.69 1846 – 2023 178 Pulkovo
6 503 356 33 10.79 1830 – 1993 164 Cambridge
7 189 283 40 7.07 1861 – 2019 159 Geneva (before 1967)
8 051 1080 32 33.75 1836 – 1987 152 Royal Observatory, Cape of Good Hope
9 075 841 258 3.26 1835 – 1985 151 Tartu
10 995 124 12 10.33 1850 – 1997 148 Durham
11 784 511 79 6.47 1866 – 2012 147 Stull Observatory, Alfred University
12 062 8795 1851 4.75 1830 – 1973 144 Turku
13 797 363 26 13.96 1879 – 2022 144 Yale Observatory, New Haven
14 089 24695 804 30.72 1882 – 2025 144 Mykolaiv
15 524 49 5 9.80 1827 – 1969 143 Mannheim
Sum 2599 504035243 3964038 127.15 1647 – 2025 379 2599 names