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 03-08-2026
| Rank | Station | Observations | Objects | Observation per object | Years of observation | Years | Station name |
|---|---|---|---|---|---|---|---|
| No. | Code | Number | Number | Range | span | ||
| 1 | 000 | 180 | 4 | 45.00 | 1906 – 1910 | 5 | Greenwich |
| 2 | 024 | 14 | 3 | 4.67 | 1908 – 1909 | 2 | Heidelberg-Konigstuhl |
| 3 | 071 | 9 | 1 | 9.00 | 1984 – 1984 | 1 | NAO Rozhen, Smolyan |
| 4 | 074 | 8 | 1 | 8.00 | 1957 – 1957 | 1 | Boyden Observatory, Bloemfontein |
| 5 | 078 | 1 | 1 | 1.00 | 1935 – 1935 | 1 | Johannesburg |
| 6 | 087 | 22 | 1 | 22.00 | 1911 – 1911 | 1 | Helwan |
| 7 | 094 | 1 | 1 | 1.00 | 1929 – 1929 | 1 | Crimea-Simeiz |
| 8 | 095 | 5 | 2 | 2.50 | 1970 – 1987 | 18 | Crimea-Nauchnyi |
| 9 | 106 | 89 | 8 | 11.13 | 1999 – 2021 | 23 | Crni Vrh |
| 10 | 118 | 5 | 1 | 5.00 | 2017 – 2017 | 1 | Astronomical and Geophysical Observatory, Modra |
| 11 | 119 | 1 | 1 | 1.00 | 1994 – 1994 | 1 | Abastuman |
| 12 | 120 | 23 | 2 | 11.50 | 1998 – 1999 | 2 | Visnjan |
| 13 | 133 | 12 | 1 | 12.00 | 1998 – 1998 | 1 | Les Tardieux |
| 14 | 138 | 3 | 1 | 3.00 | 2005 – 2005 | 1 | Village-Neuf |
| 15 | 143 | 3 | 1 | 3.00 | 2006 – 2006 | 1 | Gnosca |
| 16 | 185 | 32 | 6 | 5.33 | 2001 – 2007 | 7 | Observatoire Astronomique Jurassien-Vicques |
| 17 | 198 | 20 | 1 | 20.00 | 2010 – 2010 | 1 | Wildberg |
| 18 | 213 | 12 | 4 | 3.00 | 2006 – 2007 | 2 | Observatorio Montcabre |
| 19 | 215 | 5 | 2 | 2.50 | 2005 – 2020 | 16 | Buchloe |
| 20 | 224 | 3 | 1 | 3.00 | 2004 – 2004 | 1 | Ottmarsheim |
| 21 | 247 | 3 | 1 | 3.00 | 2023 – 2023 | 1 | Roving Observer |
| 22 | 269 | 24 | 7 | 3.43 | 2024 – 2025 | 2 | Magellan-Baade Telescope |
| 23 | 286 | 210 | 1 | 210.00 | 2003 – 2005 | 3 | Yunnan Observatory |
| 24 | 291 | 72 | 10 | 7.20 | 2003 – 2010 | 8 | LPL/Spacewatch II |
| 25 | 300 | 7 | 1 | 7.00 | 2012 – 2012 | 1 | Bisei Spaceguard Center-BATTeRS |
| 26 | 303 | 2 | 1 | 2.00 | 1994 – 1994 | 1 | OAN de Llano del Hato, Merida |
| 27 | 304 | 598 | 72 | 8.31 | 2002 – 2023 | 22 | Las Campanas Observatory |
| 28 | 309 | 136 | 21 | 6.48 | 2000 – 2022 | 23 | Cerro Paranal |
| 29 | 330 | 1 | 1 | 1.00 | 1964 – 1964 | 1 | Purple Mountain Observatory, Nanking |
| 30 | 333 | 58 | 6 | 9.67 | 2003 – 2005 | 3 | Desert Eagle Observatory |
| 31 | 337 | 115 | 1 | 115.00 | 2003 – 2004 | 2 | Sheshan |
| 32 | 365 | 9 | 2 | 4.50 | 1993 – 1993 | 1 | Uto Observatory |
| 33 | 381 | 222 | 7 | 31.71 | 1986 – 1992 | 7 | Tokyo-Kiso |
| 34 | 413 | 14 | 8 | 1.75 | 1990 – 1998 | 9 | Siding Spring Observatory |
| 35 | 415 | 2039 | 15 | 135.93 | 2004 – 2010 | 7 | Kambah |
| 36 | 461 | 3 | 1 | 3.00 | 2013 – 2013 | 1 | University of Szeged, Piszkesteto Stn. (Konkoly) |
| 37 | 493 | 68 | 9 | 7.56 | 2001 – 2002 | 2 | Calar Alto |
| 38 | 511 | 170 | 2 | 85.00 | 1998 – 1999 | 2 | Haute Provence |
| 39 | 565 | 3 | 1 | 3.00 | 2004 – 2004 | 1 | Bassano Bresciano |
| 40 | 566 | 3 | 1 | 3.00 | 1996 – 1996 | 1 | Haleakala-NEAT/GEODSS |
| 41 | 568 | 5641 | 262 | 21.53 | 1984 – 2023 | 40 | Maunakea |
| 42 | 585 | 21 | 1 | 21.00 | 2021 – 2021 | 1 | Kyiv comet station |
| 43 | 599 | 12 | 2 | 6.00 | 2004 – 2004 | 1 | Campo Imperatore-CINEOS |
| 44 | 608 | 126 | 7 | 18.00 | 2001 – 2005 | 5 | Haleakala-AMOS |
| 45 | 636 | 2 | 1 | 2.00 | 2002 – 2002 | 1 | Essen |
| 46 | 644 | 254 | 11 | 23.09 | 2001 – 2006 | 6 | Palomar Mountain/NEAT |
| 47 | 662 | 313 | 5 | 62.60 | 1904 – 1969 | 66 | Lick Observatory, Mount Hamilton |
| 48 | 672 | 199 | 8 | 24.88 | 1916 – 1951 | 36 | Mount Wilson |
| 49 | 673 | 459 | 9 | 51.00 | 1968 – 2017 | 50 | Table Mountain Observatory, Wrightwood |
| 50 | 675 | 444 | 46 | 9.65 | 1974 – 2011 | 38 | Palomar Mountain |
| 51 | 678 | 3 | 1 | 3.00 | 2000 – 2000 | 1 | Fountain Hills |
| 52 | 683 | 4 | 1 | 4.00 | 2008 – 2008 | 1 | Goodricke-Pigott Observatory, Tucson |
| 53 | 688 | 11 | 6 | 1.83 | 1982 – 2017 | 36 | Lowell Observatory, Anderson Mesa Station |
| 54 | 689 | 1306 | 8 | 163.25 | 1958 – 2012 | 55 | U.S. Naval Observatory, Flagstaff |
| 55 | 690 | 23 | 3 | 7.67 | 1929 – 1981 | 53 | Lowell Observatory, Flagstaff |
| 56 | 691 | 665 | 15 | 44.33 | 1992 – 2021 | 30 | Steward Observatory, Kitt Peak-Spacewatch |
| 57 | 693 | 25 | 6 | 4.17 | 1967 – 2000 | 34 | Catalina Station, Tucson |
| 58 | 695 | 157 | 29 | 5.41 | 1969 – 2014 | 46 | Kitt Peak |
| 59 | 696 | 61 | 10 | 6.10 | 1997 – 2002 | 6 | Whipple Observatory, Mt. Hopkins |
| 60 | 697 | 2 | 1 | 2.00 | 2000 – 2000 | 1 | Kitt Peak, McGraw-Hill |
| 61 | 699 | 193 | 8 | 24.13 | 1998 – 2006 | 9 | Lowell Observatory-LONEOS |
| 62 | 703 | 221 | 8 | 27.63 | 1999 – 2023 | 25 | Catalina Sky Survey |
| 63 | 704 | 1663 | 9 | 184.78 | 1998 – 2013 | 16 | Lincoln Laboratory ETS, New Mexico |
| 64 | 705 | 3 | 1 | 3.00 | 2004 – 2004 | 1 | Apache Point |
| 65 | 709 | 76 | 2 | 38.00 | 1997 – 1998 | 2 | W & B Observatory, Cloudcroft |
| 66 | 711 | 584 | 10 | 58.40 | 1942 – 1995 | 54 | McDonald Observatory, Fort Davis |
| 67 | 732 | 15 | 3 | 5.00 | 2000 – 2000 | 1 | Oaxaca |
| 68 | 739 | 8 | 2 | 4.00 | 2000 – 2000 | 1 | Sunflower Observatory, Olathe |
| 69 | 754 | 75 | 4 | 18.75 | 1904 – 1955 | 52 | Yerkes Observatory, Williams Bay |
| 70 | 757 | 2 | 1 | 2.00 | 1999 – 1999 | 1 | High Point |
| 71 | 760 | 4 | 1 | 4.00 | 1963 – 1970 | 8 | Goethe Link Observatory, Brooklyn |
| 72 | 761 | 3 | 1 | 3.00 | 2001 – 2001 | 1 | Zephyrhills |
| 73 | 786 | 47 | 1 | 47.00 | 1905 – 1927 | 23 | U.S. Naval Obs., Washington (since 1893) |
| 74 | 800 | 16 | 2 | 8.00 | 1898 – 1899 | 2 | Harvard Observatory, Arequipa |
| 75 | 802 | 1 | 1 | 1.00 | 1894 – 1894 | 1 | Harvard Observatory, Cambridge |
| 76 | 807 | 482 | 85 | 5.67 | 1998 – 2022 | 25 | Cerro Tololo Observatory, La Serena |
| 77 | 808 | 6 | 2 | 3.00 | 1965 – 1965 | 1 | El Leoncito |
| 78 | 809 | 180 | 22 | 8.18 | 1981 – 2013 | 33 | European Southern Observatory, La Silla |
| 79 | 822 | 17 | 2 | 8.50 | 1939 – 1952 | 14 | Cordoba |
| 80 | 829 | 4 | 1 | 4.00 | 1998 – 1998 | 1 | Complejo Astronomico El Leoncito |
| 81 | 835 | 9 | 1 | 9.00 | 1999 – 1999 | 1 | Drum Hill Station, Chelmsford |
| 82 | 850 | 25 | 1 | 25.00 | 2014 – 2014 | 1 | Cordell-Lorenz Observatory, Sewanee |
| 83 | 858 | 8 | 1 | 8.00 | 2023 – 2023 | 1 | Tebbutt Observatory, Edgewood |
| 84 | 874 | 433 | 9 | 48.11 | 1993 – 1999 | 7 | Observatorio do Pico dos Dias, Itajuba |
| 85 | 888 | 14 | 1 | 14.00 | 1988 – 1989 | 2 | Gekko |
| 86 | 910 | 3 | 1 | 3.00 | 1997 – 1997 | 1 | Caussols-ODAS |
| 87 | 919 | 2 | 1 | 2.00 | 2000 – 2000 | 1 | Desert Beaver Observatory |
| 88 | 926 | 53 | 7 | 7.57 | 2000 – 2014 | 15 | Tenagra II Observatory, Nogales |
| 89 | 938 | 8 | 2 | 4.00 | 2002 – 2021 | 20 | Linhaceira |
| 90 | 950 | 78 | 19 | 4.11 | 1997 – 2011 | 15 | La Palma |
| 91 | 958 | 9 | 2 | 4.50 | 2007 – 2013 | 7 | Observatoire de Dax |
| 92 | A13 | 20 | 1 | 20.00 | 2005 – 2005 | 1 | Observatoire Naef, Ependes |
| 93 | A50 | 13 | 2 | 6.50 | 2008 – 2011 | 4 | Andrushivka Astronomical Observatory |
| 94 | B01 | 6 | 2 | 3.00 | 2007 – 2011 | 5 | Taunus Observatory, Frankfurt |
| 95 | B18 | 9 | 1 | 9.00 | 1998 – 1998 | 1 | Terskol |
| 96 | C41 | 10 | 3 | 3.33 | 2014 – 2015 | 2 | MASTER-II Observatory, Kislovodsk |
| 97 | C51 | 275 | 10 | 27.50 | 2010 – 2024 | 15 | WISE |
| 98 | C73 | 11 | 2 | 5.50 | 2011 – 2013 | 3 | Galati Observatory |
| 99 | C77 | 3 | 1 | 3.00 | 2013 – 2013 | 1 | Bernezzo Observatory |
| 100 | C95 | 47 | 9 | 5.22 | 2013 – 2020 | 8 | SATINO Remote Observatory, Haute Provence |
| 101 | D00 | 8 | 2 | 4.00 | 2012 – 2012 | 1 | ASC-Kislovodsk Observatory |
| 102 | D29 | 647 | 13 | 49.77 | 2007 – 2025 | 19 | Purple Mountain Observatory, XuYi Station |
| 103 | D35 | 7 | 3 | 2.33 | 2006 – 2008 | 3 | Lulin Observatory |
| 104 | E07 | 559 | 17 | 32.88 | 2011 – 2015 | 5 | Murrumbateman |
| 105 | E10 | 7 | 2 | 3.50 | 2010 – 2010 | 1 | Siding Spring-Faulkes Telescope South |
| 106 | E12 | 40 | 6 | 6.67 | 2005 – 2011 | 7 | Siding Spring Survey |
| 107 | E23 | 3 | 1 | 3.00 | 2023 – 2023 | 1 | Arcadia |
| 108 | F51 | 603 | 24 | 25.13 | 2011 – 2024 | 14 | Pan-STARRS 1, Haleakala |
| 109 | F52 | 40 | 7 | 5.71 | 2015 – 2025 | 11 | Pan-STARRS 2, Haleakala |
| 110 | G34 | 4 | 1 | 4.00 | 2021 – 2021 | 1 | Oberfrauendorf |
| 111 | G36 | 994 | 13 | 76.46 | 2011 – 2022 | 12 | Calar Alto-CASADO |
| 112 | G37 | 21 | 8 | 2.63 | 2014 – 2022 | 9 | Lowell Discovery Telescope |
| 113 | G40 | 51 | 7 | 7.29 | 2015 – 2020 | 6 | Slooh.com Canary Islands Observatory |
| 114 | G45 | 427 | 7 | 61.00 | 2014 – 2016 | 3 | Space Surveillance Telescope, Atom Site |
| 115 | G68 | 15 | 1 | 15.00 | 2010 – 2010 | 1 | Sierra Stars Observatory, Markleeville |
| 116 | G80 | 217 | 1 | 217.00 | 2015 – 2015 | 1 | Sierra Remote Observatories, Auberry |
| 117 | G84 | 6 | 1 | 6.00 | 2013 – 2013 | 1 | Mount Lemmon SkyCenter |
| 118 | G92 | 14 | 3 | 4.67 | 2006 – 2006 | 1 | Jarnac Observatory, Vail |
| 119 | G96 | 541 | 18 | 30.06 | 2005 – 2025 | 21 | Mt. Lemmon Survey |
| 120 | H01 | 4 | 1 | 4.00 | 2009 – 2009 | 1 | Magdalena Ridge Observatory, Socorro |
| 121 | H06 | 47 | 9 | 5.22 | 2006 – 2013 | 8 | iTelescope Observatory, Mayhill |
| 122 | H07 | 8 | 1 | 8.00 | 2014 – 2014 | 1 | 7300 Observatory, Cloudcroft |
| 123 | H15 | 27 | 4 | 6.75 | 2010 – 2017 | 8 | ISON-NM Observatory, Mayhill |
| 124 | H21 | 7 | 2 | 3.50 | 2011 – 2012 | 2 | Astronomical Research Observatory, Westfield |
| 125 | H29 | 6 | 1 | 6.00 | 2003 – 2003 | 1 | Ivywood Observatory, Edmond |
| 126 | H82 | 6 | 1 | 6.00 | 2010 – 2010 | 1 | CBA-NOVAC Observatory, Front Royal |
| 127 | I02 | 4 | 4 | 1.00 | 1998 – 1998 | 1 | Cerro Tololo Observatory, La Serena--2MASS |
| 128 | I41 | 379 | 10 | 37.90 | 2010 – 2024 | 15 | Palomar Mountain--ZTF |
| 129 | I52 | 4 | 1 | 4.00 | 2019 – 2019 | 1 | Steward Observatory, Mt. Lemmon Station |
| 130 | I77 | 8 | 1 | 8.00 | 2010 – 2010 | 1 | CEAMIG-REA Observatory, Belo Horizonte |
| 131 | I89 | 46 | 7 | 6.57 | 2013 – 2013 | 1 | iTelescope Observatory, Nerpio |
| 132 | J04 | 9 | 2 | 4.50 | 2010 – 2015 | 6 | ESA Optical Ground Station, Tenerife |
| 133 | J37 | 9 | 3 | 3.00 | 2008 – 2011 | 4 | Huelva |
| 134 | J43 | 136 | 8 | 17.00 | 2011 – 2024 | 14 | Oukaimeden Observatory, Marrakech |
| 135 | J75 | 48 | 5 | 9.60 | 2009 – 2011 | 3 | OAM Observatory, La Sagra |
| 136 | K33 | 4 | 1 | 4.00 | 2013 – 2013 | 1 | San Defendente |
| 137 | K83 | 14 | 1 | 14.00 | 2020 – 2020 | 1 | Osservatorio Astronomico Beppe Forti, Montelupo |
| 138 | K95 | 10 | 2 | 5.00 | 2016 – 2017 | 2 | MASTER-SAAO Observatory, Sutherland |
| 139 | L01 | 3 | 1 | 3.00 | 2019 – 2019 | 1 | Visnjan Observatory, Tican |
| 140 | L51 | 3 | 1 | 3.00 | 2022 – 2022 | 1 | MARGO, Nauchnyi |
| 141 | M11 | 3 | 1 | 3.00 | 2022 – 2022 | 1 | Novaastro Observatory, Banon |
| 142 | M22 | 460 | 8 | 57.50 | 2022 – 2025 | 4 | ATLAS South Africa, Sutherland |
| 143 | O18 | 14 | 3 | 4.67 | 2023 – 2025 | 3 | WFST, Lenghu |
| 144 | P07 | 554 | 7 | 79.14 | 2021 – 2024 | 4 | Space Surveillance Telescope, HEH Station |
| 145 | R17 | 12 | 1 | 12.00 | 2025 – 2025 | 1 | ATLAS-TDO |
| 146 | T05 | 3149 | 10 | 314.90 | 2016 – 2025 | 10 | ATLAS-HKO, Haleakala |
| 147 | T08 | 2845 | 11 | 258.64 | 2017 – 2025 | 9 | ATLAS-MLO, Mauna Loa |
| 148 | T09 | 166 | 37 | 4.49 | 2016 – 2024 | 9 | Subaru Telescope, Maunakea |
| 149 | T12 | 3 | 2 | 1.50 | 2018 – 2018 | 1 | University of Hawaii 88-inch telescope, Maunakea |
| 150 | T14 | 3524 | 251 | 14.04 | 2003 – 2023 | 21 | Canada-France-Hawaii Telescope, Maunakea |
| 151 | U55 | 3 | 1 | 3.00 | 2022 – 2022 | 1 | Golden Ears Observatory, Maple Ridge |
| 152 | U69 | 2 | 1 | 2.00 | 2014 – 2014 | 1 | iTelescope SRO Observatory, Auberry |
| 153 | V00 | 151 | 24 | 6.29 | 2021 – 2025 | 5 | Kitt Peak-Bok |
| 154 | V30 | 9 | 2 | 4.50 | 2014 – 2014 | 1 | Heaven on Earth Observatory, Mayhill |
| 155 | V37 | 8 | 1 | 8.00 | 2014 – 2014 | 1 | McDonald Observatory-LCO ELP |
| 156 | W68 | 1025 | 8 | 128.13 | 2022 – 2025 | 4 | ATLAS Chile, Rio Hurtado |
| 157 | W76 | 13 | 3 | 4.33 | 2020 – 2022 | 3 | CHILESCOPE Observatory, Rio Hurtado |
| 158 | W84 | 644 | 37 | 17.41 | 2013 – 2022 | 10 | Cerro Tololo-DECam |
| 159 | W88 | 28 | 6 | 4.67 | 2015 – 2021 | 7 | Slooh.com Chile Observatory, La Dehesa |
| 160 | W92 | 3 | 1 | 3.00 | 2023 – 2023 | 1 | MASTER-OAFA Observatory, San Juan |
| 161 | W94 | 3 | 1 | 3.00 | 2022 – 2022 | 1 | MAPS, San Pedro de Atacama |
| 162 | W98 | 3 | 1 | 3.00 | 2017 – 2017 | 1 | Polonia Observatory, San Pedro de Atacama |
| 163 | X09 | 6 | 1 | 6.00 | 2025 – 2025 | 1 | Deep Random Survey, Rio Hurtado |
| 164 | X74 | 12 | 4 | 3.00 | 2019 – 2020 | 2 | Observatorio Campo dos Amarais |
| 165 | Y00 | 45 | 7 | 6.43 | 2014 – 2022 | 9 | SONEAR Observatory, Oliveira |
| 166 | Y05 | 9 | 3 | 3.00 | 2023 – 2023 | 1 | SONEAR Wykrota-CEAMIG, Serra da Piedade |
| 167 | Y89 | 12 | 2 | 6.00 | 2023 – 2025 | 3 | Proxima Centauri Observatory, Valdin |
| 168 | Z22 | 12 | 3 | 4.00 | 2016 – 2017 | 2 | MASTER-IAC Observatory, Tenerife |
| 169 | Z32 | 18 | 1 | 18.00 | 2023 – 2023 | 1 | Observatorio Astrofisico de Javalambre |
| 170 | Z80 | 56 | 8 | 7.00 | 2016 – 2023 | 8 | Northolt Branch Observatory |
| 171 | Z84 | 3 | 1 | 3.00 | 2017 – 2017 | 1 | Calar Alto-Schmidt |
| Sum | 171 | 36350 | 359 | 101.25 | 1894 – 2025 | 132 | 171 names |