MPC observations statistics

SATOBS - Observations of natural satellites

Sorted by number of observed objects

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
Number of objects of top 15 stations at Minor Planet Center for SATOBS class
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
16 D29 644 13 49.54 2007 – 2025 19 Purple Mountain Observatory, XuYi Station
17 T08 2841 11 258.27 2017 – 2025 9 ATLAS-MLO, Mauna Loa
18 644 254 11 23.09 2001 – 2006 6 Palomar Mountain/NEAT
19 G36 985 11 89.55 2011 – 2022 12 Calar Alto-CASADO
20 711 584 10 58.40 1942 – 1995 54 McDonald Observatory, Fort Davis
21 I41 379 10 37.90 2010 – 2024 15 Palomar Mountain--ZTF
22 C51 275 10 27.50 2010 – 2024 15 WISE
23 T05 3129 10 312.90 2016 – 2025 10 ATLAS-HKO, Haleakala
24 291 72 10 7.20 2003 – 2010 8 LPL/Spacewatch II
25 696 61 10 6.10 1997 – 2002 6 Whipple Observatory, Mt. Hopkins
26 673 459 9 51.00 1968 – 2017 50 Table Mountain Observatory, Wrightwood
27 704 1663 9 184.78 1998 – 2013 16 Lincoln Laboratory ETS, New Mexico
28 493 68 9 7.56 2001 – 2002 2 Calar Alto
29 874 433 9 48.11 1993 – 1999 7 Observatorio do Pico dos Dias, Itajuba
30 C95 47 9 5.22 2013 – 2020 8 SATINO Remote Observatory, Haute Provence
31 H06 47 9 5.22 2006 – 2013 8 iTelescope Observatory, Mayhill
32 M22 460 8 57.50 2022 – 2025 4 ATLAS South Africa, Sutherland
33 106 89 8 11.13 1999 – 2021 23 Crni Vrh
34 703 221 8 27.63 1999 – 2023 25 Catalina Sky Survey
35 672 199 8 24.88 1916 – 1951 36 Mount Wilson
36 699 193 8 24.13 1998 – 2006 9 Lowell Observatory-LONEOS
37 689 1306 8 163.25 1958 – 2012 55 U.S. Naval Observatory, Flagstaff
38 Z80 56 8 7.00 2016 – 2023 8 Northolt Branch Observatory
39 W68 1025 8 128.13 2022 – 2025 4 ATLAS Chile, Rio Hurtado
40 J43 136 8 17.00 2011 – 2024 14 Oukaimeden Observatory, Marrakech
41 G37 21 8 2.63 2014 – 2022 9 Lowell Discovery Telescope
42 413 14 8 1.75 1990 – 1998 9 Siding Spring Observatory
43 926 53 7 7.57 2000 – 2014 15 Tenagra II Observatory, Nogales
44 G40 51 7 7.29 2015 – 2020 6 Slooh.com Canary Islands Observatory
45 G45 427 7 61.00 2014 – 2016 3 Space Surveillance Telescope, Atom Site
46 608 126 7 18.00 2001 – 2005 5 Haleakala-AMOS
47 I89 46 7 6.57 2013 – 2013 1 iTelescope Observatory, Nerpio
48 Y00 45 7 6.43 2014 – 2022 9 SONEAR Observatory, Oliveira
49 P07 554 7 79.14 2021 – 2024 4 Space Surveillance Telescope, HEH Station
50 381 222 7 31.71 1986 – 1992 7 Tokyo-Kiso
51 E12 40 6 6.67 2005 – 2011 7 Siding Spring Survey
52 F52 33 6 5.50 2015 – 2024 10 Pan-STARRS 2, Haleakala
53 185 32 6 5.33 2001 – 2007 7 Observatoire Astronomique Jurassien-Vicques
54 W88 28 6 4.67 2015 – 2021 7 Slooh.com Chile Observatory, La Dehesa
55 693 25 6 4.17 1967 – 2000 34 Catalina Station, Tucson
56 V00 52 6 8.67 2021 – 2025 5 Kitt Peak-Bok
57 333 58 6 9.67 2003 – 2005 3 Desert Eagle Observatory
58 688 11 6 1.83 1982 – 2017 36 Lowell Observatory, Anderson Mesa Station
59 662 313 5 62.60 1904 – 1969 66 Lick Observatory, Mount Hamilton
60 J75 48 5 9.60 2009 – 2011 3 OAM Observatory, La Sagra
61 000 180 4 45.00 1906 – 1910 5 Greenwich
62 H15 27 4 6.75 2010 – 2017 8 ISON-NM Observatory, Mayhill
63 213 12 4 3.00 2006 – 2007 2 Observatorio Montcabre
64 X74 12 4 3.00 2019 – 2020 2 Observatorio Campo dos Amarais
65 754 75 4 18.75 1904 – 1955 52 Yerkes Observatory, Williams Bay
66 I02 4 4 1.00 1998 – 1998 1 Cerro Tololo Observatory, La Serena--2MASS
67 G92 14 3 4.67 2006 – 2006 1 Jarnac Observatory, Vail
68 W76 13 3 4.33 2020 – 2022 3 CHILESCOPE Observatory, Rio Hurtado
69 Z22 12 3 4.00 2016 – 2017 2 MASTER-IAC Observatory, Tenerife
70 T09 19 3 6.33 2016 – 2021 6 Subaru Telescope, Maunakea
71 732 15 3 5.00 2000 – 2000 1 Oaxaca
72 024 14 3 4.67 1908 – 1909 2 Heidelberg-Konigstuhl
73 C41 10 3 3.33 2014 – 2015 2 MASTER-II Observatory, Kislovodsk
74 J37 9 3 3.00 2008 – 2011 4 Huelva
75 Y05 9 3 3.00 2023 – 2023 1 SONEAR Wykrota-CEAMIG, Serra da Piedade
76 D35 7 3 2.33 2006 – 2008 3 Lulin Observatory
77 690 23 3 7.67 1929 – 1981 53 Lowell Observatory, Flagstaff
78 120 23 2 11.50 1998 – 1999 2 Visnjan
79 C73 11 2 5.50 2011 – 2013 3 Galati Observatory
80 822 17 2 8.50 1939 – 1952 14 Cordoba
81 800 16 2 8.00 1898 – 1899 2 Harvard Observatory, Arequipa
82 K95 10 2 5.00 2016 – 2017 2 MASTER-SAAO Observatory, Sutherland
83 365 9 2 4.50 1993 – 1993 1 Uto Observatory
84 958 9 2 4.50 2007 – 2013 7 Observatoire de Dax
85 J04 9 2 4.50 2010 – 2015 6 ESA Optical Ground Station, Tenerife
86 A50 13 2 6.50 2008 – 2011 4 Andrushivka Astronomical Observatory
87 V30 9 2 4.50 2014 – 2014 1 Heaven on Earth Observatory, Mayhill
88 Y89 9 2 4.50 2023 – 2023 1 Proxima Centauri Observatory, Valdin
89 511 170 2 85.00 1998 – 1999 2 Haute Provence
90 938 8 2 4.00 2002 – 2021 20 Linhaceira
91 739 8 2 4.00 2000 – 2000 1 Sunflower Observatory, Olathe
92 D00 8 2 4.00 2012 – 2012 1 ASC-Kislovodsk Observatory
93 599 12 2 6.00 2004 – 2004 1 Campo Imperatore-CINEOS
94 H21 7 2 3.50 2011 – 2012 2 Astronomical Research Observatory, Westfield
95 E10 7 2 3.50 2010 – 2010 1 Siding Spring-Faulkes Telescope South
96 B01 6 2 3.00 2007 – 2011 5 Taunus Observatory, Frankfurt
97 808 6 2 3.00 1965 – 1965 1 El Leoncito
98 O18 6 2 3.00 2023 – 2023 1 WFST, Lenghu
99 095 5 2 2.50 1970 – 1987 18 Crimea-Nauchnyi
100 215 5 2 2.50 2005 – 2020 16 Buchloe
101 709 76 2 38.00 1997 – 1998 2 W & B Observatory, Cloudcroft
102 T12 3 2 1.50 2018 – 2018 1 University of Hawaii 88-inch telescope, Maunakea
103 198 20 1 20.00 2010 – 2010 1 Wildberg
104 850 25 1 25.00 2014 – 2014 1 Cordell-Lorenz Observatory, Sewanee
105 133 12 1 12.00 1998 – 1998 1 Les Tardieux
106 B18 9 1 9.00 1998 – 1998 1 Terskol
107 I77 8 1 8.00 2010 – 2010 1 CEAMIG-REA Observatory, Belo Horizonte
108 074 8 1 8.00 1957 – 1957 1 Boyden Observatory, Bloemfontein
109 H07 8 1 8.00 2014 – 2014 1 7300 Observatory, Cloudcroft
110 V37 8 1 8.00 2014 – 2014 1 McDonald Observatory-LCO ELP
111 Z32 18 1 18.00 2023 – 2023 1 Observatorio Astrofisico de Javalambre
112 337 115 1 115.00 2003 – 2004 2 Sheshan
113 286 210 1 210.00 2003 – 2005 3 Yunnan Observatory
114 858 8 1 8.00 2023 – 2023 1 Tebbutt Observatory, Edgewood
115 786 47 1 47.00 1905 – 1927 23 U.S. Naval Obs., Washington (since 1893)
116 G68 15 1 15.00 2010 – 2010 1 Sierra Stars Observatory, Markleeville
117 300 7 1 7.00 2012 – 2012 1 Bisei Spaceguard Center-BATTeRS
118 087 22 1 22.00 1911 – 1911 1 Helwan
119 G84 6 1 6.00 2013 – 2013 1 Mount Lemmon SkyCenter
120 H82 6 1 6.00 2010 – 2010 1 CBA-NOVAC Observatory, Front Royal
121 H29 6 1 6.00 2003 – 2003 1 Ivywood Observatory, Edmond
122 888 14 1 14.00 1988 – 1989 2 Gekko
123 G80 217 1 217.00 2015 – 2015 1 Sierra Remote Observatories, Auberry
124 585 21 1 21.00 2021 – 2021 1 Kyiv comet station
125 118 5 1 5.00 2017 – 2017 1 Astronomical and Geophysical Observatory, Modra
126 835 9 1 9.00 1999 – 1999 1 Drum Hill Station, Chelmsford
127 K83 14 1 14.00 2020 – 2020 1 Beppe Forti Astronomical Observatory, Montelupo
128 829 4 1 4.00 1998 – 1998 1 Complejo Astronomico El Leoncito
129 G34 4 1 4.00 2021 – 2021 1 Oberfrauendorf
130 760 4 1 4.00 1963 – 1970 8 Goethe Link Observatory, Brooklyn
131 I52 4 1 4.00 2019 – 2019 1 Steward Observatory, Mt. Lemmon Station
132 683 4 1 4.00 2008 – 2008 1 Goodricke-Pigott Observatory, Tucson
133 K33 4 1 4.00 2013 – 2013 1 San Defendente
134 H01 4 1 4.00 2009 – 2009 1 Magdalena Ridge Observatory, Socorro
135 A13 20 1 20.00 2005 – 2005 1 Observatoire Naef, Ependes
136 461 3 1 3.00 2013 – 2013 1 University of Szeged, Piszkesteto Stn. (Konkoly)
137 678 3 1 3.00 2000 – 2000 1 Fountain Hills
138 143 3 1 3.00 2006 – 2006 1 Gnosca
139 910 3 1 3.00 1997 – 1997 1 Caussols-ODAS
140 W94 3 1 3.00 2022 – 2022 1 MAPS, San Pedro de Atacama
141 L51 3 1 3.00 2022 – 2022 1 MARGO, Nauchnyi
142 565 3 1 3.00 2004 – 2004 1 Bassano Bresciano
143 224 3 1 3.00 2004 – 2004 1 Ottmarsheim
144 138 3 1 3.00 2005 – 2005 1 Village-Neuf
145 071 9 1 9.00 1984 – 1984 1 NAO Rozhen, Smolyan
146 705 3 1 3.00 2004 – 2004 1 Apache Point
147 W98 3 1 3.00 2017 – 2017 1 Polonia Observatory, San Pedro de Atacama
148 Z84 3 1 3.00 2017 – 2017 1 Calar Alto-Schmidt
149 U55 3 1 3.00 2022 – 2022 1 Golden Ears Observatory, Maple Ridge
150 M11 3 1 3.00 2022 – 2022 1 Novaastro Observatory, Banon
151 566 3 1 3.00 1996 – 1996 1 Haleakala-NEAT/GEODSS
152 C77 3 1 3.00 2013 – 2013 1 Bernezzo Observatory
153 L01 3 1 3.00 2019 – 2019 1 Visnjan Observatory, Tican
154 W92 3 1 3.00 2023 – 2023 1 MASTER-OAFA Observatory, San Juan
155 E23 3 1 3.00 2023 – 2023 1 Arcadia
156 761 3 1 3.00 2001 – 2001 1 Zephyrhills
157 697 2 1 2.00 2000 – 2000 1 Kitt Peak, McGraw-Hill
158 919 2 1 2.00 2000 – 2000 1 Desert Beaver Observatory
159 636 2 1 2.00 2002 – 2002 1 Essen
160 303 2 1 2.00 1994 – 1994 1 OAN de Llano del Hato, Merida
161 757 2 1 2.00 1999 – 1999 1 High Point
162 U69 2 1 2.00 2014 – 2014 1 iTelescope SRO Observatory, Auberry
163 078 1 1 1.00 1935 – 1935 1 Johannesburg
164 119 1 1 1.00 1994 – 1994 1 Abastuman
165 802 1 1 1.00 1894 – 1894 1 Harvard Observatory, Cambridge
166 094 1 1 1.00 1929 – 1929 1 Crimea-Simeiz
167 330 1 1 1.00 1964 – 1964 1 Purple Mountain Observatory, Nanking
Sum 167 35047 359 97.62 1894 – 2025 132 167 names