MPC observations statistics

SATOBS - Observations of natural satellites

Sorted by years span of observations

The statistics were made with a self-developed program by Jost Jahn, Amrum, Germany, itfstat@jostjahn.de.

They will be updated some days after publication of new files by the MPC, mostly each 2 months or so.
Date of this file is 10-26-2025
Year range of observations of top 15 stations at Minor Planet Center for SATOBS class
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
16 703 221 8 27.63 1999 – 2023 25 Catalina Sky Survey
17 786 47 1 47.00 1905 – 1927 23 U.S. Naval Obs., Washington (since 1893)
18 106 89 8 11.13 1999 – 2021 23 Crni Vrh
19 309 136 21 6.48 2000 – 2022 23 Cerro Paranal
20 304 598 72 8.31 2002 – 2023 22 Las Campanas Observatory
21 T14 2630 219 12.01 2003 – 2023 21 Canada-France-Hawaii Telescope, Maunakea
22 G96 513 17 30.18 2005 – 2025 21 Mt. Lemmon Survey
23 938 8 2 4.00 2002 – 2021 20 Linhaceira
24 D29 644 13 49.54 2007 – 2025 19 Purple Mountain Observatory, XuYi Station
25 095 5 2 2.50 1970 – 1987 18 Crimea-Nauchnyi
26 704 1663 9 184.78 1998 – 2013 16 Lincoln Laboratory ETS, New Mexico
27 215 5 2 2.50 2005 – 2020 16 Buchloe
28 926 53 7 7.57 2000 – 2014 15 Tenagra II Observatory, Nogales
29 950 78 19 4.11 1997 – 2011 15 La Palma
30 C51 275 10 27.50 2010 – 2024 15 WISE
31 I41 379 10 37.90 2010 – 2024 15 Palomar Mountain--ZTF
32 822 17 2 8.50 1939 – 1952 14 Cordoba
33 F51 600 24 25.00 2011 – 2024 14 Pan-STARRS 1, Haleakala
34 J43 136 8 17.00 2011 – 2024 14 Oukaimeden Observatory, Marrakech
35 G36 985 11 89.55 2011 – 2022 12 Calar Alto-CASADO
36 W84 630 37 17.03 2013 – 2022 10 Cerro Tololo-DECam
37 F52 33 6 5.50 2015 – 2024 10 Pan-STARRS 2, Haleakala
38 T05 3129 10 312.90 2016 – 2025 10 ATLAS-HKO, Haleakala
39 Y00 45 7 6.43 2014 – 2022 9 SONEAR Observatory, Oliveira
40 G37 21 8 2.63 2014 – 2022 9 Lowell Discovery Telescope
41 413 14 8 1.75 1990 – 1998 9 Siding Spring Observatory
42 699 193 8 24.13 1998 – 2006 9 Lowell Observatory-LONEOS
43 T08 2841 11 258.27 2017 – 2025 9 ATLAS-MLO, Mauna Loa
44 291 72 10 7.20 2003 – 2010 8 LPL/Spacewatch II
45 H15 27 4 6.75 2010 – 2017 8 ISON-NM Observatory, Mayhill
46 760 4 1 4.00 1963 – 1970 8 Goethe Link Observatory, Brooklyn
47 Z80 56 8 7.00 2016 – 2023 8 Northolt Branch Observatory
48 H06 47 9 5.22 2006 – 2013 8 iTelescope Observatory, Mayhill
49 C95 47 9 5.22 2013 – 2020 8 SATINO Remote Observatory, Haute Provence
50 E12 40 6 6.67 2005 – 2011 7 Siding Spring Survey
51 381 222 7 31.71 1986 – 1992 7 Tokyo-Kiso
52 W88 28 6 4.67 2015 – 2021 7 Slooh.com Chile Observatory, La Dehesa
53 415 2039 15 135.93 2004 – 2010 7 Kambah
54 958 9 2 4.50 2007 – 2013 7 Observatoire de Dax
55 874 433 9 48.11 1993 – 1999 7 Observatorio do Pico dos Dias, Itajuba
56 185 32 6 5.33 2001 – 2007 7 Observatoire Astronomique Jurassien-Vicques
57 644 254 11 23.09 2001 – 2006 6 Palomar Mountain/NEAT
58 J04 9 2 4.50 2010 – 2015 6 ESA Optical Ground Station, Tenerife
59 G40 51 7 7.29 2015 – 2020 6 Slooh.com Canary Islands Observatory
60 T09 19 3 6.33 2016 – 2021 6 Subaru Telescope, Maunakea
61 696 61 10 6.10 1997 – 2002 6 Whipple Observatory, Mt. Hopkins
62 E07 559 17 32.88 2011 – 2015 5 Murrumbateman
63 000 180 4 45.00 1906 – 1910 5 Greenwich
64 608 126 7 18.00 2001 – 2005 5 Haleakala-AMOS
65 B01 6 2 3.00 2007 – 2011 5 Taunus Observatory, Frankfurt
66 V00 52 6 8.67 2021 – 2025 5 Kitt Peak-Bok
67 A50 13 2 6.50 2008 – 2011 4 Andrushivka Astronomical Observatory
68 J37 9 3 3.00 2008 – 2011 4 Huelva
69 P07 554 7 79.14 2021 – 2024 4 Space Surveillance Telescope, HEH Station
70 M22 460 8 57.50 2022 – 2025 4 ATLAS South Africa, Sutherland
71 W68 1025 8 128.13 2022 – 2025 4 ATLAS Chile, Rio Hurtado
72 D35 7 3 2.33 2006 – 2008 3 Lulin Observatory
73 J75 48 5 9.60 2009 – 2011 3 OAM Observatory, La Sagra
74 W76 13 3 4.33 2020 – 2022 3 CHILESCOPE Observatory, Rio Hurtado
75 286 210 1 210.00 2003 – 2005 3 Yunnan Observatory
76 C73 11 2 5.50 2011 – 2013 3 Galati Observatory
77 333 58 6 9.67 2003 – 2005 3 Desert Eagle Observatory
78 G45 427 7 61.00 2014 – 2016 3 Space Surveillance Telescope, Atom Site
79 709 76 2 38.00 1997 – 1998 2 W & B Observatory, Cloudcroft
80 511 170 2 85.00 1998 – 1999 2 Haute Provence
81 K95 10 2 5.00 2016 – 2017 2 MASTER-SAAO Observatory, Sutherland
82 888 14 1 14.00 1988 – 1989 2 Gekko
83 024 14 3 4.67 1908 – 1909 2 Heidelberg-Konigstuhl
84 Z22 12 3 4.00 2016 – 2017 2 MASTER-IAC Observatory, Tenerife
85 213 12 4 3.00 2006 – 2007 2 Observatorio Montcabre
86 800 16 2 8.00 1898 – 1899 2 Harvard Observatory, Arequipa
87 X74 12 4 3.00 2019 – 2020 2 Observatorio Campo dos Amarais
88 337 115 1 115.00 2003 – 2004 2 Sheshan
89 120 23 2 11.50 1998 – 1999 2 Visnjan
90 C41 10 3 3.33 2014 – 2015 2 MASTER-II Observatory, Kislovodsk
91 H21 7 2 3.50 2011 – 2012 2 Astronomical Research Observatory, Westfield
92 493 68 9 7.56 2001 – 2002 2 Calar Alto
93 919 2 1 2.00 2000 – 2000 1 Desert Beaver Observatory
94 683 4 1 4.00 2008 – 2008 1 Goodricke-Pigott Observatory, Tucson
95 566 3 1 3.00 1996 – 1996 1 Haleakala-NEAT/GEODSS
96 678 3 1 3.00 2000 – 2000 1 Fountain Hills
97 H01 4 1 4.00 2009 – 2009 1 Magdalena Ridge Observatory, Socorro
98 739 8 2 4.00 2000 – 2000 1 Sunflower Observatory, Olathe
99 G68 15 1 15.00 2010 – 2010 1 Sierra Stars Observatory, Markleeville
100 808 6 2 3.00 1965 – 1965 1 El Leoncito
101 H82 6 1 6.00 2010 – 2010 1 CBA-NOVAC Observatory, Front Royal
102 I77 8 1 8.00 2010 – 2010 1 CEAMIG-REA Observatory, Belo Horizonte
103 761 3 1 3.00 2001 – 2001 1 Zephyrhills
104 910 3 1 3.00 1997 – 1997 1 Caussols-ODAS
105 E10 7 2 3.50 2010 – 2010 1 Siding Spring-Faulkes Telescope South
106 802 1 1 1.00 1894 – 1894 1 Harvard Observatory, Cambridge
107 198 20 1 20.00 2010 – 2010 1 Wildberg
108 071 9 1 9.00 1984 – 1984 1 NAO Rozhen, Smolyan
109 087 22 1 22.00 1911 – 1911 1 Helwan
110 636 2 1 2.00 2002 – 2002 1 Essen
111 B18 9 1 9.00 1998 – 1998 1 Terskol
112 829 4 1 4.00 1998 – 1998 1 Complejo Astronomico El Leoncito
113 I02 4 4 1.00 1998 – 1998 1 Cerro Tololo Observatory, La Serena--2MASS
114 D00 8 2 4.00 2012 – 2012 1 ASC-Kislovodsk Observatory
115 300 7 1 7.00 2012 – 2012 1 Bisei Spaceguard Center-BATTeRS
116 461 3 1 3.00 2013 – 2013 1 University of Szeged, Piszkesteto Stn. (Konkoly)
117 I89 46 7 6.57 2013 – 2013 1 iTelescope Observatory, Nerpio
118 K33 4 1 4.00 2013 – 2013 1 San Defendente
119 C77 3 1 3.00 2013 – 2013 1 Bernezzo Observatory
120 074 8 1 8.00 1957 – 1957 1 Boyden Observatory, Bloemfontein
121 G84 6 1 6.00 2013 – 2013 1 Mount Lemmon SkyCenter
122 094 1 1 1.00 1929 – 1929 1 Crimea-Simeiz
123 U69 2 1 2.00 2014 – 2014 1 iTelescope SRO Observatory, Auberry
124 V37 8 1 8.00 2014 – 2014 1 McDonald Observatory-LCO ELP
125 H29 6 1 6.00 2003 – 2003 1 Ivywood Observatory, Edmond
126 850 25 1 25.00 2014 – 2014 1 Cordell-Lorenz Observatory, Sewanee
127 078 1 1 1.00 1935 – 1935 1 Johannesburg
128 V30 9 2 4.50 2014 – 2014 1 Heaven on Earth Observatory, Mayhill
129 133 12 1 12.00 1998 – 1998 1 Les Tardieux
130 H07 8 1 8.00 2014 – 2014 1 7300 Observatory, Cloudcroft
131 565 3 1 3.00 2004 – 2004 1 Bassano Bresciano
132 224 3 1 3.00 2004 – 2004 1 Ottmarsheim
133 705 3 1 3.00 2004 – 2004 1 Apache Point
134 599 12 2 6.00 2004 – 2004 1 Campo Imperatore-CINEOS
135 G80 217 1 217.00 2015 – 2015 1 Sierra Remote Observatories, Auberry
136 330 1 1 1.00 1964 – 1964 1 Purple Mountain Observatory, Nanking
137 138 3 1 3.00 2005 – 2005 1 Village-Neuf
138 A13 20 1 20.00 2005 – 2005 1 Observatoire Naef, Ependes
139 835 9 1 9.00 1999 – 1999 1 Drum Hill Station, Chelmsford
140 365 9 2 4.50 1993 – 1993 1 Uto Observatory
141 118 5 1 5.00 2017 – 2017 1 Astronomical and Geophysical Observatory, Modra
142 W98 3 1 3.00 2017 – 2017 1 Polonia Observatory, San Pedro de Atacama
143 Z84 3 1 3.00 2017 – 2017 1 Calar Alto-Schmidt
144 119 1 1 1.00 1994 – 1994 1 Abastuman
145 T12 3 2 1.50 2018 – 2018 1 University of Hawaii 88-inch telescope, Maunakea
146 L01 3 1 3.00 2019 – 2019 1 Visnjan Observatory, Tican
147 757 2 1 2.00 1999 – 1999 1 High Point
148 I52 4 1 4.00 2019 – 2019 1 Steward Observatory, Mt. Lemmon Station
149 303 2 1 2.00 1994 – 1994 1 OAN de Llano del Hato, Merida
150 K83 14 1 14.00 2020 – 2020 1 Beppe Forti Astronomical Observatory, Montelupo
151 G92 14 3 4.67 2006 – 2006 1 Jarnac Observatory, Vail
152 585 21 1 21.00 2021 – 2021 1 Kyiv comet station
153 143 3 1 3.00 2006 – 2006 1 Gnosca
154 G34 4 1 4.00 2021 – 2021 1 Oberfrauendorf
155 M11 3 1 3.00 2022 – 2022 1 Novaastro Observatory, Banon
156 W94 3 1 3.00 2022 – 2022 1 MAPS, San Pedro de Atacama
157 L51 3 1 3.00 2022 – 2022 1 MARGO, Nauchnyi
158 732 15 3 5.00 2000 – 2000 1 Oaxaca
159 697 2 1 2.00 2000 – 2000 1 Kitt Peak, McGraw-Hill
160 U55 3 1 3.00 2022 – 2022 1 Golden Ears Observatory, Maple Ridge
161 E23 3 1 3.00 2023 – 2023 1 Arcadia
162 Z32 18 1 18.00 2023 – 2023 1 Observatorio Astrofisico de Javalambre
163 O18 6 2 3.00 2023 – 2023 1 WFST, Lenghu
164 858 8 1 8.00 2023 – 2023 1 Tebbutt Observatory, Edgewood
165 Y05 9 3 3.00 2023 – 2023 1 SONEAR Wykrota-CEAMIG, Serra da Piedade
166 Y89 9 2 4.50 2023 – 2023 1 Proxima Centauri Observatory, Valdin
167 W92 3 1 3.00 2023 – 2023 1 MASTER-OAFA Observatory, San Juan
Sum 167 35047 359 97.62 1894 – 2025 132 167 names