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 06-06-2026
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 5696 272 20.94 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
14 691 668 15 44.53 1992 – 2021 30 Steward Observatory, Kitt Peak-Spacewatch
15 807 560 97 5.77 1998 – 2022 25 Cerro Tololo Observatory, La Serena
16 703 221 8 27.63 1999 – 2023 25 University of Arizona 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
20 304 717 88 8.15 2002 – 2023 22 Las Campanas Observatory
21 T14 3812 271 14.07 2003 – 2023 21 Canada-France-Hawaii Telescope, Maunakea
22 G96 549 18 30.50 2005 – 2025 21 University of Arizona Mt. Lemmon Survey
23 938 8 2 4.00 2002 – 2021 20 Linhaceira
24 958 12 3 4.00 2007 – 2026 20 Observatoire de Dax
25 D29 680 13 52.31 2007 – 2025 19 Purple Mountain Observatory, XuYi Station
26 095 5 2 2.50 1970 – 1987 18 Crimea-Nauchnyi
27 215 5 2 2.50 2005 – 2020 16 Buchloe
28 704 1663 9 184.78 1998 – 2013 16 Lincoln Laboratory ETS, New Mexico
29 950 78 19 4.11 1997 – 2011 15 La Palma
30 926 53 7 7.57 2000 – 2014 15 Tenagra II Observatory, Nogales
31 I41 379 10 37.90 2010 – 2024 15 Palomar Mountain--ZTF
32 C51 275 10 27.50 2010 – 2024 15 WISE
33 822 17 2 8.50 1939 – 1952 14 Cordoba
34 F51 603 24 25.13 2011 – 2024 14 Pan-STARRS 1, Haleakala
35 J43 139 8 17.38 2011 – 2024 14 Oukaimeden Observatory, Marrakech
36 G36 994 13 76.46 2011 – 2022 12 Calar Alto-CASADO
37 F52 40 7 5.71 2015 – 2025 11 Pan-STARRS 2, Haleakala
38 W84 650 38 17.11 2013 – 2022 10 Cerro Tololo-DECam
39 T09 222 48 4.63 2016 – 2025 10 Subaru Telescope, Maunakea
40 T05 3177 10 317.70 2016 – 2025 10 ATLAS-HKO, Haleakala
41 Y00 45 7 6.43 2014 – 2022 9 SONEAR Observatory, Oliveira
42 699 193 8 24.13 1998 – 2006 9 Lowell Observatory-LONEOS
43 413 14 8 1.75 1990 – 1998 9 Siding Spring Observatory
44 G37 21 8 2.63 2014 – 2022 9 Lowell Discovery Telescope
45 T08 2864 11 260.36 2017 – 2025 9 ATLAS-MLO, Mauna Loa
46 H15 27 4 6.75 2010 – 2017 8 ISON-NM Observatory, Mayhill
47 H06 47 9 5.22 2006 – 2013 8 iTelescope Observatory, Mayhill
48 291 72 10 7.20 2003 – 2010 8 LPL/Spacewatch II
49 Z80 56 8 7.00 2016 – 2023 8 Northolt Branch Observatory
50 C95 47 9 5.22 2013 – 2020 8 SATINO Remote Observatory, Haute Provence
51 760 4 1 4.00 1963 – 1970 8 Goethe Link Observatory, Brooklyn
52 L01 13 3 4.33 2019 – 2026 8 Visnjan Observatory, Tican
53 185 32 6 5.33 2001 – 2007 7 Observatoire Astronomique Jurassien-Vicques
54 E12 40 6 6.67 2005 – 2011 7 Siding Spring Survey
55 381 222 7 31.71 1986 – 1992 7 Tokyo-Kiso
56 415 2039 15 135.93 2004 – 2010 7 Kambah
57 874 433 9 48.11 1993 – 1999 7 Observatorio do Pico dos Dias, Itajuba
58 W88 28 6 4.67 2015 – 2021 7 Slooh.com Chile Observatory, La Dehesa
59 644 254 11 23.09 2001 – 2006 6 Palomar Mountain/NEAT
60 G40 51 7 7.29 2015 – 2020 6 Slooh.com Canary Islands Observatory
61 696 61 10 6.10 1997 – 2002 6 Whipple Observatory, Mt. Hopkins
62 J04 9 2 4.50 2010 – 2015 6 ESA Optical Ground Station, Tenerife
63 B01 6 2 3.00 2007 – 2011 5 Taunus Observatory, Frankfurt
64 000 180 4 45.00 1906 – 1910 5 Greenwich
65 608 126 7 18.00 2001 – 2005 5 Haleakala-AMOS
66 E07 559 17 32.88 2011 – 2015 5 Murrumbateman
67 V00 155 24 6.46 2021 – 2025 5 Kitt Peak-Bok
68 J37 9 3 3.00 2008 – 2011 4 Huelva
69 A50 13 2 6.50 2008 – 2011 4 Andrushivka Astronomical Observatory
70 P07 565 7 80.71 2021 – 2024 4 Space Surveillance Telescope, HEH Station
71 W68 1025 8 128.13 2022 – 2025 4 ATLAS Chile, Rio Hurtado
72 M22 460 8 57.50 2022 – 2025 4 ATLAS South Africa, Sutherland
73 O18 32 4 8.00 2023 – 2026 4 WFST, Lenghu
74 333 58 6 9.67 2003 – 2005 3 Desert Eagle Observatory
75 W76 13 3 4.33 2020 – 2022 3 CHILESCOPE Observatory, Rio Hurtado
76 C73 11 2 5.50 2011 – 2013 3 Galati Observatory
77 286 210 1 210.00 2003 – 2005 3 Yunnan Observatory
78 G45 427 7 61.00 2014 – 2016 3 Space Surveillance Telescope, Atom Site
79 D35 7 3 2.33 2006 – 2008 3 Lulin Observatory
80 J75 48 5 9.60 2009 – 2011 3 OAM Observatory, La Sagra
81 Y89 12 2 6.00 2023 – 2025 3 Proxima Centauri Observatory, Valdin
82 269 115 27 4.26 2024 – 2026 3 Magellan-Baade Telescope
83 024 14 3 4.67 1908 – 1909 2 Heidelberg-Konigstuhl
84 K95 10 2 5.00 2016 – 2017 2 MASTER-SAAO Observatory, Sutherland
85 800 16 2 8.00 1898 – 1899 2 Harvard Observatory, Arequipa
86 337 115 1 115.00 2003 – 2004 2 Sheshan
87 X74 12 4 3.00 2019 – 2020 2 Observatorio Campo dos Amarais
88 213 12 4 3.00 2006 – 2007 2 Observatorio Montcabre
89 120 23 2 11.50 1998 – 1999 2 Visnjan
90 H21 7 2 3.50 2011 – 2012 2 Astronomical Research Observatory, Westfield
91 C41 10 3 3.33 2014 – 2015 2 MASTER-II Observatory, Kislovodsk
92 709 76 2 38.00 1997 – 1998 2 W & B Observatory, Cloudcroft
93 493 68 9 7.56 2001 – 2002 2 Calar Alto
94 511 170 2 85.00 1998 – 1999 2 Haute Provence
95 Z22 12 3 4.00 2016 – 2017 2 MASTER-IAC Observatory, Tenerife
96 888 14 1 14.00 1988 – 1989 2 Gekko
97 678 3 1 3.00 2000 – 2000 1 Fountain Hills
98 H01 4 1 4.00 2009 – 2009 1 Magdalena Ridge Observatory, Socorro
99 I77 8 1 8.00 2010 – 2010 1 CEAMIG-REA Observatory, Belo Horizonte
100 H82 6 1 6.00 2010 – 2010 1 CBA-NOVAC Observatory, Front Royal
101 808 6 2 3.00 1965 – 1965 1 El Leoncito
102 802 1 1 1.00 1894 – 1894 1 Harvard Observatory, Cambridge
103 G68 15 1 15.00 2010 – 2010 1 Sierra Stars Observatory, Markleeville
104 198 20 1 20.00 2010 – 2010 1 Wildberg
105 E10 7 2 3.50 2010 – 2010 1 Siding Spring-Faulkes Telescope South
106 910 3 1 3.00 1997 – 1997 1 Caussols-ODAS
107 071 9 1 9.00 1984 – 1984 1 NAO Rozhen, Smolyan
108 761 3 1 3.00 2001 – 2001 1 Zephyrhills
109 087 22 1 22.00 1911 – 1911 1 Helwan
110 B18 9 1 9.00 1998 – 1998 1 Terskol
111 636 2 1 2.00 2002 – 2002 1 Essen
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
114 300 7 1 7.00 2012 – 2012 1 Bisei Spaceguard Center-BATTeRS
115 D00 8 2 4.00 2012 – 2012 1 ASC-Kislovodsk Observatory
116 K33 4 1 4.00 2013 – 2013 1 San Defendente
117 074 8 1 8.00 1957 – 1957 1 Boyden Observatory, Bloemfontein
118 C77 3 1 3.00 2013 – 2013 1 Bernezzo Observatory
119 I89 46 7 6.57 2013 – 2013 1 iTelescope Observatory, Nerpio
120 461 3 1 3.00 2013 – 2013 1 University of Szeged, Piszkesteto Stn. (Konkoly)
121 G84 6 1 6.00 2013 – 2013 1 Mount Lemmon SkyCenter
122 094 1 1 1.00 1929 – 1929 1 Crimea-Simeiz
123 H29 6 1 6.00 2003 – 2003 1 Ivywood Observatory, Edmond
124 078 1 1 1.00 1935 – 1935 1 Johannesburg
125 705 3 1 3.00 2004 – 2004 1 Apache Point
126 V30 9 2 4.50 2014 – 2014 1 Heaven on Earth Observatory, Mayhill
127 H07 8 1 8.00 2014 – 2014 1 7300 Observatory, Cloudcroft
128 U69 2 1 2.00 2014 – 2014 1 iTelescope SRO Observatory, Auberry
129 V37 8 1 8.00 2014 – 2014 1 McDonald Observatory-LCO ELP
130 133 12 1 12.00 1998 – 1998 1 Les Tardieux
131 850 25 1 25.00 2014 – 2014 1 Cordell-Lorenz Observatory, Sewanee
132 565 3 1 3.00 2004 – 2004 1 Bassano Bresciano
133 224 3 1 3.00 2004 – 2004 1 Ottmarsheim
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 A13 20 1 20.00 2005 – 2005 1 Observatoire Naef, Ependes
137 330 1 1 1.00 1964 – 1964 1 Purple Mountain Observatory, Nanking
138 138 3 1 3.00 2005 – 2005 1 Village-Neuf
139 365 9 2 4.50 1993 – 1993 1 Uto Observatory
140 835 9 1 9.00 1999 – 1999 1 Drum Hill Station, Chelmsford
141 W98 3 1 3.00 2017 – 2017 1 Polonia Observatory, San Pedro de Atacama
142 Z84 3 1 3.00 2017 – 2017 1 Calar Alto-Schmidt
143 118 5 1 5.00 2017 – 2017 1 Astronomical and Geophysical Observatory, Modra
144 G92 14 3 4.67 2006 – 2006 1 Jarnac Observatory, Vail
145 T12 5 3 1.67 2018 – 2018 1 University of Hawaii 88-inch telescope, Maunakea
146 I52 4 1 4.00 2019 – 2019 1 Steward Observatory, Mt. Lemmon Station
147 757 2 1 2.00 1999 – 1999 1 High Point
148 143 3 1 3.00 2006 – 2006 1 Gnosca
149 303 2 1 2.00 1994 – 1994 1 OAN de Llano del Hato, Merida
150 K83 14 1 14.00 2020 – 2020 1 Osservatorio Astronomico Beppe Forti, Montelupo
151 119 1 1 1.00 1994 – 1994 1 Abastuman
152 G34 4 1 4.00 2021 – 2021 1 Oberfrauendorf
153 732 15 3 5.00 2000 – 2000 1 Oaxaca
154 585 21 1 21.00 2021 – 2021 1 Kyiv comet station
155 M11 3 1 3.00 2022 – 2022 1 Novaastro Observatory, Banon
156 566 3 1 3.00 1996 – 1996 1 Haleakala-NEAT/GEODSS
157 697 2 1 2.00 2000 – 2000 1 Kitt Peak, McGraw-Hill
158 L51 3 1 3.00 2022 – 2022 1 MARGO, Nauchnyi
159 W94 3 1 3.00 2022 – 2022 1 MAPS, San Pedro de Atacama
160 U55 3 1 3.00 2022 – 2022 1 Golden Ears Observatory, Maple Ridge
161 Y05 9 3 3.00 2023 – 2023 1 SONEAR Wykrota-CEAMIG, Serra da Piedade
162 W92 3 1 3.00 2023 – 2023 1 MASTER-OAFA Observatory, San Juan
163 E23 3 1 3.00 2023 – 2023 1 Arcadia
164 Z32 18 1 18.00 2023 – 2023 1 Observatorio Astrofisico de Javalambre
165 858 8 1 8.00 2023 – 2023 1 Tebbutt Observatory, Edgewood
166 919 2 1 2.00 2000 – 2000 1 Desert Beaver Observatory
167 247 3 1 3.00 2023 – 2023 1 Roving Observer
168 739 8 2 4.00 2000 – 2000 1 Sunflower Observatory, Olathe
169 N89 3 1 3.00 2023 – 2023 1 Xingming Observatory #2, Nanshan
170 683 4 1 4.00 2008 – 2008 1 Goodricke-Pigott Observatory, Tucson
171 R17 41 2 20.50 2025 – 2025 1 ATLAS-TDO
172 X09 6 1 6.00 2025 – 2025 1 Deep Random Survey, Rio Hurtado
173 M26 5 2 2.50 2026 – 2026 1 Zen Observatory, Scandicci
174 X04 3 1 3.00 2026 – 2026 1 MCD Observatory, Saint-Anaclet
175 R59 6 2 3.00 2026 – 2026 1 Camarasa Observatory, Astrocamp Nerpio
176 104 4 2 2.00 2026 – 2026 1 San Marcello Pistoiese
177 Z21 3 1 3.00 2026 – 2026 1 Tenerife-LCO Aqawan A #1
178 M14 3 1 3.00 2026 – 2026 1 Schiaparelli Gallarate Station
179 718 3 1 3.00 2026 – 2026 1 Tooele
180 126 6 2 3.00 2026 – 2026 1 Monte Viseggi L. Zannoni Observatory
181 D43 2 1 2.00 2026 – 2026 1 45th Parallel Observatory, Pino Torinese
182 Q10 3 1 3.00 2026 – 2026 1 Toyokawa Observatory
183 M38 2 1 2.00 2026 – 2026 1 Harsona Observatory, Nyiregyhaza
184 R63 2 1 2.00 2026 – 2026 1 Observatorio Sureste Estelar, Fuente Alamo
185 N56 3 1 3.00 2026 – 2026 1 Jiama'erdeng Tianwentai JIST project, Ali, Tibet
186 N51 6 2 3.00 2026 – 2026 1 GROWTH India Telescope, IAO, Hanle
187 C97 6 2 3.00 2026 – 2026 1 Al-Fulaij Observatory, Oman
188 R95 3 1 3.00 2026 – 2026 1 Fiammetta Observatory, La Spezia
189 C82 4 1 4.00 2026 – 2026 1 Osservatorio Astronomico Nastro Verde, Sorrento
190 J95 3 1 3.00 2026 – 2026 1 Great Shefford
191 V21 5 1 5.00 2026 – 2026 1 Cewanee Observatory at DSNM
192 K32 3 1 3.00 2026 – 2026 1 Maritime Alps Observatory, Cuneo
193 M54 3 1 3.00 2026 – 2026 1 Observatoire Albireo de Biot
194 B72 3 1 3.00 2026 – 2026 1 Soerth Observatory
Sum 194 37298 395 94.43 1894 – 2026 133 194 names