• 390: Utsunomiya
• 391: Sendai Observatory, Ayashi Station
• 392: JCPM Sapporo Station
• 393: JCPM Sakura Station
• 394: JCPM Hamatonbetsu Station
• 395: Tokyo-Asahikawa
• 396: Asahikawa
• 397: Sapporo Science Center
• 398: Nagatoro
• 399: Kushiro

400-499

• 400: Kitami
• 401: Oosato
• 402: Dynic Astronomical Observatory
• 403: Kani
• 404: Yamamoto
• 405: Kamihoriguchi
• 406: Bibai
• 407: Kahoku
• 408: Nyukasa
• 409: Kiyose and Mizuho
• 410: Sengamine (Sengamine Observatory, Hyōgo, Japan)
• 411: Oizumi Observatory
• 412: Iwaki
• 413: Siding Spring Observatory
• 414: Mount Stromlo
• 415: Kambah, near Canberra (Kambah Observatory)
• 416: Barton, near Canberra
• 417: Yanagida Astronomical Observatory
• 418: Tamworth
• 419: Windsor
• 420: Sydney
• 421: Mt. Kajigamori, Otoyo
• 422: Loomberah
• 423: North Ryde
• 424: Macquarie, near Canberra
• 425: Taylor Range Observatory, Brisbane
• 426: Woomera
• 427: Stockport
• 428: Reedy Creek
• 429: Hawker
• 430: Rainbow Observatory, near Coonabarabran
• 431: Mt. Tarana Observatory, Bathurst
• 432: Boambee
• 433: Bagnall Beach Observatory
• 434: S. Benedetto Po
• 435: G. Colombo Astronomical Observatory, Padua
• 436: Osservatorio di Livergnano
• 437: Haverford
• 438: Smith College Observatory, Northampton
• 439: ROTSE-III, Los Alamos
• 440: Elginfield Observatory
• 441: Swilken Brae, St. Andrews
• 442: Gualba Observatory
• 443: Obs. Astronomico Plomer, Buenos Aires
• 444: Star Cruiser Observatory
• 445: Observatori d'Ontinyent
• 446: Kingsnake Observatory
• 447: Centennial Observatory
• 448: Desert Moon Observatory, Las Cruces
• 449: Griffin Hunter Observatory
• 450: Carla Jane Observatory, Charlotte
• 451: West Skies Observatory, Mulvane
• 452: Big Cypress Observatory
• 453: Edwards Raven Observatory
• 454: Maryland Space Grant Consortium Observatory
• 455: CBA Concord
• 456: Daventry Observatory
• 457: Partizanske
• 458: Guadarrama Observatory
• 459: Smith River Observatory, Danbury
• 460: Area 52 Observatory, Nashville
• 461: Szeged University, Piszkesteto Stn. (Konkoly)
• 462: Mount Belleview Observatory
• 463: Sommers-Bausch Observatory, Boulder
• 464: Toby Point Observatory, Narragansett
• 465: Takapuna
• 466: Mount Molehill Observatory, Auckland
• 467: Auckland Observatory (Stardome Observatory)
• 468: Astronomical Observatory, Campo Catino (Osservatorio Astronomico Campo Catino)
• 469: Courroux
• 470: Ceccano
• 471: Houstrup
• 472: Merlette
• 473: Remanzacco
• 474: Mount John Observatory, Lake Tekapo (Mount John University Observatory)
• 475: Turin Observatory (before 1913)
• 476: Grange Observatory, Bussoleno
• 477: Galleywood
• 478: Lamalou-les-Bains
• 479: Sollies-Pont
• 480: Cockfield
• 481: Moorwarfen
• 482: St. Andrews
• 483: Carter Observatory, Black Birch Station
• 484: Happy Valley, Wellington
• 485: Carter Observatory, Wellington
• 486: Palmerston North
• 487: Macnairston Observatory
• 488: Newcastle-upon-Tyne
• 489: Hemingford Abbots
• 490: Wimborne Minster
• 491: Centro Astronómico de Yebes, Spain
• 492: Mickleover
• 493: Calar Alto Observatory
• 494: Stakenbridge
• 495: Altrincham
• 496: Bishopstoke
• 497: Ascot-Loudwater
• 498: Northampton
• 499: Cheam

500-599

• 500: Geocentric
• 501: Herstmonceux
• 502: Colchester
• 503: Cambridge
• 504: Le Creusot, France
• 505: Simon Stevin
• 506: Bendestorf
• 507: Nyenheim
• 508: Zeist
• 509: La Seyne sur Mer
• 510: Siegen
• 511: Observatoire de Haute-Provence, France
• 512: Leiden (before 1860)
• 513: Lyons
• 514: Mundenheim (1907-1913)
• 515: Volkssternwarte Dhaun, near Kirn
• 516: Hamburg (before 1909)
• 517: Geneva (from 1967), Switzerland
• 518: Marine Observatory, Hamburg
• 519: Meschede
• 520: Bonn
• 521: Bamberg
• 522: Observatory of Strasbourg (Observatoire de Strasbourg)
• 523: Frankfurt
• 524: Mannheim
• 525: Marburg
• 526: Kiel
• 527: Altona
• 528: Gottingen
• 529: Christiania
• 530: Lubeck
• 531: Collegio Romano, Rome (Osservatorio del Collegio Romano)
• 532: Munich, Germany (Universitäts-Sternwarte München, Bogenhausener Sternwarte; a.k.a. Königlichen Sternwarte zu Bogenhausen)
• 533: Padua
• 534: Leipzig (since 1861)
• 535: Palermo (Osservatorio Astronomico di Palermo "Giuseppe S. Vaiana", Sicily)
• 536: Berlin-Babelsberg (Berlin Observatory after 1913)
• 537: Urania Observatory, Berlin (Urania Sternwarte)
• 538: Pola, Croatia (Kaiserlichen und Koniglichen Kriegsmarine Pola Sternwarte; Austro-Hungarian Imperial [and Royal] Naval Observatory in Pola, now Pula, Croatia)
• 539: Kremsmunster
• 540: Linz (Davidschlag Observatory; Private Observatory Meyer/Obermair; Sternwarte Davidschlag, Austria)
• 541: Prague Observatory
• 542: Falkensee
• 543: Leipzig (before 1861)
• 544: Wilhelm Foerster Observatory, Berlin (Wilhelm-Foerster-Sternwarte)
• 545: Vienna Observatory (before 1879)
• 546: Oppolzer Observatory, Vienna
• 547: Breslau
• 548: Berlin (1835-1913) (Berliner Sternwarte, Berlin Observatory, before 1913)
• 549: Uppsala (Uppsala Astronomical Observatory (UAO); Astronomiska observatoriet i Uppsala)
• 550: Schwerin
• 551: Hurbanovo, formerly O'Gyalla
• 552: Osservatorio S. Vittore, Bologna (Osservatorio San Vittore, Italy)
• 553: Chorzow
• 554: Burgsolms Observatory, Wetzlar
• 555: Cracow-Fort Skala
• 556: Reintal, near Munich
• 557: Ondřejov Observatory (Observatoř Ondřejov, Czech Republic)
• 558: Warsaw
• 559: Serra La Nave
• 560: Madonna di Dossobuono (Osservatorio Madonna di Dossobuono, Italy)
• 561: Piszkesteto Stn. (Konkoly) (Piszkéstető Station, Konkoly Obszervatórium, Budapest)
• 562: Figl Observatory, Vienna
• 563: Seewalchen
• 564: Herrsching
• 565: Bassano Bresciano (Osservatorio Astronomico di Bassano Bresciano, Italy)
• 566: Haleakala-NEAT/GEODSS
• 567: Chions (Osservatorio di Chions; Chaonis Observatory, Italy)
• 568: Mauna Kea Observatory, Hawaii
• 569: Helsinki
• 570: Vilnius (since 1939)
• 571: Cavriana (Osservatorio "Giordano Bruno", Italy)
• 572: Cologne
• 573: Eldagsen
• 574: Gottolengo
• 575: La Chaux de Fonds
• 576: Burwash
• 577: Metzerlen Observatory
• 578: Linden Observatory
• 579: Novi Ligure
• 580: Graz
• 581: Sedgefield
• 582: Orwell Park
• 583: Odessa-Mayaki
• 584: Leningrad
• 585: Kiev comet station
• 586: Pic du Midi (Observatoire du Pic du Midi, France)
• 587: Sormano (Osservatorio Astronomico Sormano, Italy)
• 588: Eremo di Tizzano
• 589: Osservatorio Astrometrico Santa Lucia Stroncone
• 590: Metzerlen
• 591: Resse Observatory
• 592: Solingen, Germany
• 593: Monte Argentario
• 594: Monte Autore
• 595: Farra d'Isonzo (Osservatorio Astronomico di Farra d'Isonzo, Italy)
• 596: Colleverde di Guidonia (Osservatorio Colleverde di Guidonia, Italy)
• 597: Springe
• 598: Loiano (Osservatorio Astronomico di Loiano, Italy)
• 599: Campo Imperatore-CINEOS (Osservatorio di Campo Imperatore, Italy)

600-699

• 600: TLC Observatory, Bologna
• 601: Engelhardt Observatory, Dresden
• 602: Urania Observatory, Vienna
• 603: Bothkamp, near Kiel, Germany (Sternwarte Bothkamp, Bothkamp Observatory)
• 604: Archenhold Sternwarte, Berlin-Treptow
• 605: Marl
• 606: Norderstedt
• 607: Hagen Observatory, Ronkhausen
• 608: Haleakala-AMOS
• 609: Osservatorio Polino
• 610: Pianoro
• 611: Starkenburg Sternwarte, Heppenheim (Starkenburg Observatory)
• 612: Lenkerbeck
• 613: Heisingen
• 614: Soisy-sur-Seine
• 615: St. Veran
• 616: Brno
• 617: Arbonne-la-Forêt
• 618: Martigues
• 619: Sabadell
• 620: Observatorio Astronomico de Mallorca
• 621: Bergisch Gladbach Observatory
• 622: Oberwichtrach
• 623: Liege
• 624: Dertingen
• 625: Kihei-AMOS Remote Maui Experimental Site
• 626: Geel
• 627: Blauvac
• 628: Mulheim-Ruhr
• 629: JATE Observatory, Szeged
• 630: Osenbach
• 631: Hamburg-Georgswerder
• 632: San Polo A Mosciano
• 633: Romito
• 634: Crolles
• 635: Pergignan
• 636: Essen (Walter-Hohmann-Sternwarte Essen; Walter Hohmann Observatory)
• 637: Hamburg-Himmelsmoor
• 638: Detmold
• 639: Dresden
• 640: Senftenberger Sternwarte
• 641: Overberg
• 642: Oak Bay, Victoria
• 643: OCA-Anza Observatory
• 644: Palomar Mountain/NEAT
• 645: Apache Point-Sloan Digital Sky Survey
• 646: Santana Observatory, Rancho Cucamonga
• 647: Stone Finder Observatory, Calgary
• 648: Winer Observatory, Sonoita
• 649: Powell Observatory, Louisburg
• 650: Temecula
• 651: Grasslands Observatory, Tucson
• 652: Rock Finder Observatory, Calgary
• 653: Torus Observatory, Buckley
• 654: Table Mountain Observatory, Wrightwood-PHMC
• 655: Sooke
• 656: Victoria
• 657: Climenhaga Observatory, Victoria
• 658: National Research Council of Canada (Dominion Astrophysical Observatory)
• 659: Heron Cove Observatory, Orcas
• 660: Leuschner Observatory, Berkeley
• 661: Rothney Astrophysical Observatory, Priddis
• 662: Lick Observatory, Mount Hamilton
• 663: Red Mountain Observatory
• 664: Manastash Ridge Observatory
• 665: Wallis Observatory
• 666: Moorpark College Observatory
• 667: Wanapum Dam
• 668: San Emigdio Peak
• 669: Ojai
• 670: Camarillo
• 671: Stony Ridge
• 672: Mount Wilson
• 673: Table Mountain Observatory, Wrightwood
• 674: Ford Observatory, Wrightwood
• 675: Palomar Mountain (Palomar Observatory)
• 676: San Clemente
• 677: Lake Arrowhead
• 678: Fountain Hills (Fountain Hills Observatory, Fountain Hills, AZ)
• 679: San Pedro Martir
• 680: Los Angeles
• 681: Calgary
• 682: Kanab
• 683: Goodricke-Pigott Observatory, Tucson
• 684: Prescott (Prescott Observatory)
• 685: Williams, AZ
• 686: U. of Minn. Infrared Obs., Mt. Lemmon (Mount Lemmon)
• 687: Northern Arizona University, Flagstaff
• 688: Lowell Observatory, Anderson Mesa Station (Anderson Mesa), Flagstaff
• 689: U.S. Naval Observatory, Flagstaff (USNOFS)
• 690: Lowell Observatory, Flagstaff
• 691: Steward Observatory, Kitt Peak-Spacewatch
• 692: Steward Observatory, Tucson
• 693: Catalina Station, Tucson
• 694: Tumamoc Hill, Tucson
• 695: Kitt Peak National Observatory
• 696: Whipple Observatory, Mt. Hopkins (Fred Lawrence Whipple Observatory)
• 697: Kitt Peak, McGraw-Hill
• 698: Mt. Bigelow
• 699: Lowell Observatory-LONEOS (LONEOS)

700-799

• 700: Chinle
• 701: Junk Bond Observatory, Sierra Vista, AZ
• 702: Joint Obs. for cometary research, Socorro, NM (now the New Mexico Tech Remote Observatory)
• 703: Catalina Sky Survey, Tucson, AZ
• 704: Lincoln Laboratory ETS, New Mexico (ETS = Experimental Test System)
• 705: Apache Point (Apache Point Observatory, NM)
• 706: Salida, CO
• 707: Chamberlin field station, CO
• 708: Chamberlin Observatory, Denver, CO
• 709: W & B Observatory, Cloudcroft, NM
• 710: MPO Observatory, Florissant, CO
• 711: McDonald Observatory, Fort Davis, TX
• 712: USAF Academy Observatory, Colorado Springs, CO
• 713: Thornton, CO
• 714: Bagdad, AZ
• 715: Jornada Observatory, Las Cruces, NM
• 716: Palmer Divide Observatory, Colorado Springs, CO
• 717: Prude Ranch, TX
• 718: University of Utah, Tooele, UT
• 719: Frank T. Etscorn Campus Observatory, Socorro, NM (New Mexico Tech Astronomy Club)
• 720: Universidad de Monterrey, Nuevo León, Mexico
• 721: Lime Creek (Lime Creek Observatory, NE)
• 722: Missouri City, TX
• 723: Cottonwood Observatory, Ada, OK
• 724: National Observatory, Tacubaya (Observatorio Astronómico Nacional; Observatorio de Tacubaya, Mexico)
• 725: Fair Oaks Ranch (Fair Oaks Ranch Observatory, Fair Oaks Ranch, Texas)
• 726: Brainerd (Fire in the Sky Observatory, Brainerd, MN)
• 727: Zeno Observatory, Edmond, OK
• 728: Corpus Christi, TX
• 729: Glenlea Astronomical Observatory, Winnipeg, MB
• 730: University of North Dakota, Grand Forks, ND
• 731: Rose-Hulman Observatory, Terre Haute, IN
• 732: Oaxaca, Oaxaca, Mexico
• 733: Allen, Texas
• 734: Farpoint Observatory, Eskridge, KS
• 735: George Observatory, Needville, TX
• 736: Houston, TX
• 737: New Bullpen Observatory, Alpharetta, GA
• 738: Observatory of the State University of Missouri
• 739: Sunflower Observatory, Olathe, KS
• 740: SFA Observatory, Nacogdoches, TX (Stephen F. Austin State University Observatory)
• 741: Goodsell Observatory, Northfield, MN
• 742: Drake University, Des Moines, IA
• 743: University of Minnesota, Minneapolis, MN
• 744: Doyan Rose Observatory, Indianapolis, IN
• 745: Glasgow, Missouri
• 746: Brooks Astronomical Observatory, Mt. Pleasant, MI
• 747: Baton Rouge Observatory, LA
• 748: Van Allen Observatory, Iowa City, IA
• 749: Oakwood, GA
• 750: Hobbs Observatory, Fall Creek, WI
• 751: Lake Saint Louis, MO
• 752: Puckett Observatory, Mountain Town, GA
• 753: Washburn Observatory, Madison, WI
• 754: Yerkes Observatory, Williams Bay, WI
• 755: Optec Observatory, MI
• 756: Dearborn Observatory, Evanston, IL
• 757: High Point, NC
• 758: BCC Observatory, Cocoa, FL (Astronaut Memorial Planetarium & Observatory; BCC = Brevard Community College)
• 759: Nashville, TN
• 760: Goethe Link Observatory, Brooklyn, IN
• 761: Zephyrhills (Quail Hollow Observatory, Zephyrhills, FL)
• 762: Four Winds Observatory, Lake Leelanau, MI
• 763: King City, ON
• 764: Puckett Observatory, Stone Mountain, GA
• 765: Cincinnati, OH
• 766: Michigan State University Observatory, East Lansing, MI
• 767: Angell Hall Observatory, Ann Arbor, MI
• 768: Dearborn, MI
• 769: McMillin Observatory, Columbus, OH
• 770: Crescent Moon Observatory, Columbus, OH
• 771: Boyeros Observatory, Havana, Cuba (Observatorio de Rancho Boyeros)
• 772: Boltwood Observatory, Stittsville, ON
• 773: Warner and Swasey Observatory, Cleveland, OH
• 774: Warner and Swasey Nassau Station, Chardon, OH
• 775: Sayre Observatory, South Bethlehem, PA
• 776: Foggy Bottom, Hamilton (Foggy Bottom Observatory, Hamilton , NY)
• 777: Toronto, ON
• 778: Allegheny Observatory, Pittsburgh, PA
• 779: David Dunlap Observatory, Richmond Hill, ON
• 780: Leander McCormick Observatory, Charlottesville, VA
• 781: Quito, Ecuador
• 782: Quito, comet astrograph station
• 783: Rixeyville, VA
• 784: Stull Observatory, Alfred University, NY
• 785: Fitz-Randolph Observatory, Princeton, NJ
• 786: U.S. Naval Obs., Washington (since 1893)
• 787: U.S. Naval Obs., Washington (before 1893)
• 788: Mount Cuba Observatory, Wilmington, DE
• 789: Litchfield Observatory, Hamilton College, Clinton, Oneida County, NY
• 790: Dominion Observatory, Ottawa, ON
• 791: Flower and Cook Observatory, Philadelphia, PA
• 792: U. of Rhode Island, Quonochontaug, RI
• 793: Dudley Observatory, Albany (before 1893)
• 794: Vassar College Observatory, Poughkeepsie, NY
• 795: Rutherford, NY
• 796: Stamford, CT
• 797: Yale Observatory, New Haven, CT (Yale University Observatory)
• 798: Yale Observatory, Bethany, CT (Yale University Observatory)
• 799: Winchester, MA

800-899

• 800: Harvard Observatory, Arequipa, Peru (Boyden Station)
• 801: Oak Ridge Observatory
• 802: Harvard Observatory, Cambridge, MA (Harvard College Observatory)
• 803: Taunton
• 804: Santiago-San Bernardo
• 805: Santiago-Cerro El Roble
• 806: Santiago-Cerro Calan
• 807: Cerro Tololo Observatory, La Serena (Cerro Tololo Inter-American Observatory)
• 808: El Leoncito (became the Dr. Carlos U. Cesco Observatory (Estación de Altura Carlos Ulrico Cesco) in 1990; seems to be the same as the Observatorio Félix Aguilar, San Juan National University)
• 809: European Southern Observatory, La Silla (La Silla Observatory)
• 810: Wallace Observatory, Westford (George R. Wallace Jr. Astrophysical Observatory (WAO), Westford, MA)
• 811: Maria Mitchell Observatory, Nantucket
• 812: Vina del Mar
• 813: Santiago-Quinta Normal (1862-1920)
• 814: North Scituate
• 815: Santiago-Santa Lucia (1849-1861)
• 816: Rand Observatory
• 817: Sudbury (Sudbury, Massachusetts)
• 818: Gémeaux Observatory, Laval, QC (Observatoire Gémeaux)
• 819: Val-des-Bois, QC
• 820: Tarija
• 821: Cordoba-Bosque Alegre (Estación Astrofísica de Bosque Alegre, Observatorio Astronómico de Córdoba, Argentina)
• 822: Cordoba (Observatorio Astronómico de Córdoba, Argentina)
• 823: Fitchburg
• 824: Lake Clear
• 825: Granville
• 826: Plessissville, QC
• 827: Saint-Félicien, QC
• 828: Assonet
• 829: Complejo Astronómico El Leoncito (CASLEO)
• 830: Hudson
• 831: Rosemary Hill Observatory, University of Florida
• 832: Etters
• 833: Obs. Astronomico de Mercedes, Buenos Aires
• 834: Buenos Aires-AAAA
• 835: Drum Hill Station, Chelmsford
• 836: Furnace Brook Observatory, Cranston
• 837: Jupiter
• 838: Dayton
• 839: La Plata (La Plata Astronomical Observatory; Observatorio Astronómico de La Plata)
• 840: Flint
• 841: Martin Observatory, Blacksburg
• 842: Gettysburg College Observatory
• 843: Emerald Lane Observatory, Decatur
• 844: Los Molinos
• 845: Clinton B. Ford Observatory , Ithaca
• 846: Principia Astronomical Observatory, Elsah
• 847: Lunar Cafe Observatory
• 848: Tenagra Observatory, Cottage Grove
• 849: Everstar Observatory, Olathe, KS (EverStaR Observatory)
• 850: Cordell-Lorenz Observatory, Sewanee
• 851: Burke-Gaffney Observatory, Halifax
• 852: River Moss Observatory, St. Peters
• 853: Biosphere 2 Observatory
• 854: Sabino Canyon Observatory, Tucson
• 855: Wayside Observatory, Minnetonka
• 856: Riverside
• 857: Iowa Robotic Observatory, Sonoita
• 858: Tebbutt Observatory, Edgewood
• 859: Wykrota Observatory-CEAMIG (Observatório Wykrota - CEAMIG (Centro de Estudos Astronômicos de Minas Gerais))
• 860: Valinhos
• 861: Barao Geraldo
• 862: Saku
• 863: Furukawa
• 864: Kumamoto (KCAO (Kumamoto Civil Astronomical Observatory), Kumamoto, Kumamoto, Japan)
• 865: Emmy Observatory, New Paltz
• 866: U.S. Naval Academy, Michelson
• 867: Saji Observatory
• 868: Hidaka Observatory
• 869: Tosa
• 870: Campinas (Observatório de Campinas, a.k.a. Observatório Municipal de Campinas "Jean Nicolini")
• 871: Akou
• 872: Tokushima
• 873: Kurashiki Observatory
• 874: Itajuba
• 875: Yorii
• 876: Honjo
• 877: Okutama
• 878: Kagiya
• 879: Tōkai (Tōkai, Aichi, Japan)
• 880: Rio de Janeiro
• 881: Toyota
• 882: JCPM Oi Station
• 883: Shizuoka (Shizuoka, Shizuoka, Japan)
• 884: Kawane
• 885: JCPM Yakiimo Station
• 886: Mishima (Mishima, Shizuoka, a.k.a. Susono, Shizuoka, Japan)
• 887: Ojima (Ojima, Gunma, Japan)
• 888: Gekko Observatory
• 889: Karasuyama (Karasuyama, Tochigi, Japan)
• 890: JCPM Tone Station
• 891: JCPM Kimachi Station
• 892: YGCO Hoshikawa and Nagano Stations
• 893: Sendai Municipal Observatory (Sendai Astronomical Observatory)
• 894: Kiyosato
• 895: Hatamae
• 896: Yatsugatake South Base Observatory (near 386 Yatsugatake-Kobuchizawa)
• 897: YGCO Chiyoda Station (YGCO: Yamaneko Group of Comet Observers)
• 898: Fujieda (Fujieda, Shizuoka, Japan)
• 899: Toma

900-999

• 900: Moriyama (Moriyama, Shiga, Japan)
• 901: Tajimi
• 902: Ootake
• 903: Fukuchiyama and Kannabe (Fukuchiyama and Kannabe Observatory, Japan)
• 904: Go-Chome and Kobe-Suma
• 905: Nachi-Katsuura Observatory
• 906: Cobram
• 907: Melbourne
• 908: Toyama
• 909: Snohomish Hilltop Observatory
• 910: Caussols-ODAS
• 911: Collins Observatory, Corning Community College
• 912: Carbuncle Hill Observatory, Greene
• 913: Observatorio Kappa Crucis, Montevideo
• 914: Underwood Observatory, Hubbardston
• 915: River Oaks Observatory, New Braunfels
• 916: Oakley Observatory, Terre Haute
• 917: Pacific Lutheran University Keck Observatory
• 918: Badlands Observatory, Quinn
• 919: Desert Beaver Observatory
• 920: RIT Observatory, Rochester, NY (RIT = Rochester Institute of Technology)
• 921: SW Institute for Space Research, Cloudcroft
• 922: Timberland Observatory, Decatur
• 923: The Bradstreet Observatory, St. Davids
• 924: Observatoire du Cégep de Trois-Rivières
• 925: Palominas Observatory
• 926: Tenagra II Observatory
• 927: Madison-YRS
• 928: Moonedge Observatory, Northport
• 929: Port Allen
• 930: Tahiti
• 931: Punaauia
• 932: John J. McCarthy Obs., New Milford
• 933: Rockland Observatory, Sierra Vista
• 934: Poway Valley
• 935: Wyrick Observatory, Haymarket
• 936: Ibis Observatory, Manhaatan
• 937: Bradbury Observatory, Stockton-on-Tees
• 938: Linhaceira
• 939: Observatorio Rodeno
• 940: Waterlooville
• 941: Observatorio Pla D'Arguines
• 942: Grantham
• 943: Peverell
• 944: Observatorio Geminis, Dos Hermanas
• 945: Observatorio Monte Deva
• 946: Ametlla de Mar Observatory
• 947: Saint-Sulpice
• 948: Pymoor
• 949: Durtal
• 950: Roque de los Muchachos Observatory, La Palma
• 951: Highworth
• 952: Marxuquera
• 953: Montjoia
• 954: Teide Observatory (Observatorio del Teide)
• 955: Sassoeiros
• 956: Observatorio Pozuelo
• 957: Merignac
• 958: Observatoire de Dax
• 959: Ramonville Saint Agne
• 960: Rolvenden
• 961: City Observatory, Edinburgh
• 962: Gandia
• 963: Werrington
• 964: Southend Bradfield
• 965: Observação Astronómica no Algarve, Portimão (COAA: Centro de Observação Astronómica no Algarve)
• 966: Church Stretton
• 967: Greens Norton
• 968: Haverhill
• 969: London-Regents Park (George Bishop's Observatory, Regent's Park, 1836-1861)
• 970: Chelmsford
• 971: Lisbon
• 972: Dun Echt
• 973: Harrow
• 974: Genoa
• 975: Valencia
• 976: Leamington Spa
• 977: Markree (Markree Observatory, County Sligo, Ireland)
• 978: Conder Brow
• 979: South Wonston
• 980: Lancaster
• 981: Armagh
• 982: Dunsink Observatory, Dublin
• 983: San Fernando
• 984: Eastfield
• 985: Telford
• 986: Ascot
• 987: The Isle of Man Observatory
• 988: Glasgow
• 989: Wilfred Hall Observatory, Preston
• 990: Madrid, Spain (Observatorio Astronómico de Madrid)
• 991: Liverpool (since 1867)
• 992: Liverpool (before 1867)
• 993: Woolston Observatory
• 994: Godalming
• 995: Durham
• 996: Oxford
• 997: Hartwell
• 998: London-Mill Hill (University of London Observatory)
• 999: Bordeaux-Floirac (Observatoire de Bordeaux)

A00-A99

• A00: Clark Observatory, Gravesend
• A01: Masia Cal Maciarol Modul 1
• A02: Masia Cal Maciarol Modul 8
• A03: Torredembarra
• A04: Saint-Caprais
• A05: Belesta
• A06: Mataro
• A07: Gretz-Armainvilliers
• A08: Malibert
• A09: Quincampoix
• A10: Observatori Astronomic de Corbera
• A11: Wormhout
• A12: Stazione Astronomica di Sozzago
• A13: Observatoire Naef, Marly, Switzerland (Observatory Naef Ependes)
• A14: Les Engarouines Observatory
• A15: Josef Bresser Sternwarte, Borken
• A16: Tentlingen
• A17: Guidestar Observatory, Weinheim
• A18: Herne
• A19: Koln
• A20: Sogel
• A21: Irmtraut
• A22: Starkenburg Sternwarte-SOHAS
• A23: Sternwarte Weinheim, Germany
• A24: New Millennium Observatory, Mozzate
• A25: Nova Milanese
• A26: Darmstadt
• A27: Eridanus Observatory, Langelsheim
• A28: Kempten
• A29: Santa Maria a Monte
• A30: Crespadoro
• A31: Corcaroli Observatory
• A32: Panker
• A33: Volkssternwarte Kirchheim
• A34: Grosshabersdorf
• A35: Hormersdorf Observatory
• A36: Ganda di Aviatico
• A37: Mueggelheim
• A38: Campocatino Automated Telescope, Collepardo
• A39: Altenburg
• A40: Pieta
• A41: Rezman Observatory, Kamnik
• A42: Gehrden
• A43: Inastars Observatory, Potsdam
• A44: Altschwendt
• A45: Karrenkneul
• A46: Lelekovice
• A47: Matera
• A48: Povegliano Veronese
• A49: Uppsala-Angstrom
• A50: Andrushivka Astronomical Observatory (Андрушiвська Астрономiчна Обсерваторiя)
• A51: Danzig
• A52: Etyek
• A53: Peschiera del Garda
• A54: Ostrorog
• A55: Osservatorio Astronomico Vallemare di Borbona, Italy
• A56: Parma
• A57: Osservatorio Astron. Margherita Hack, Firenze
• A58: Observatoire de Chalandray-Canotiers
• A59: Karlovy Vary Observatory
• A60: YSTAR-NEOPAT Station, Sutherland
• A61: Tortona
• A62: Aichtal
• A63: Cosmosoz Obs., Tassin la Demi Lune
• A64: Couvaloup de St-Cergue
• A65: Le Couvent de Lentin
• A66: Stazione Osservativa Astronomica, Livorno
• A67: Chiusa di Pesio
• A68: Swedenborg Obs., Bockholmwik
• A69: Osservatorio Palazzo Bindi Sergardi
• A70: Lumijoki
• A71: Stixendorf
• A72: Radebeul Observatory (Sternwarte "Adolph Diesterweg" Radebeul, Germany)
• A73: Penzing Astrometric Obs., Vienna
• A74: Bergen-Enkheim Observatory, Germany
• A75: Fort Pius Observatory, Barcelona
• A76: Andromeda Observatory, Miskolc
• A77: Observatoire Chante-Perdrix, Dauban, Haute-Provence, France
• A78: Stia
• A79: Zvezdno Obshtestvo Observatory, Plana
• A80: Lindenberg Observatory
• A81: Balzaretto Observatory, Rome
• A82: Osservatorio Astronomico di Trieste
• A83: Jakokoski Observatory
• A84: TUBITAK National Observatory
• A85: Odessa Astronomical Observatory, Kryzhanovka
• A86: Albigneux
• A87: Rimbach
• A88: Bolzaneto
• A89: Sterni Observatory, Kempten
• A90: Sant Gervasi Observatory, Barcelona
• A91: Hankasalmi Observatory, Hankasalmi, Finland
• A92: Urseanu Observatory, Bucharest
• A93: Lucca
• A94: Cormons
• A95: Taurus Hill Observatory, Varkaus
• A96: Klosterneuburg
• A97: Stammersdorf
• A98: Taurus-1 Observatory, Baran'
• A99: Osservatorio del Monte Baldo

B00-B99

• B00: Savigny-le-Temple
• B01: Taunus Observatory, Frankfurt
• B02: Kielce
• B03: Alter Satzberg, Vienna
• B04: Saint-Barthelemy Observatory
• B05: Ka-Dar Observatory, Barybino
• B06: Montseny Astronomical Observatory
• B07: Camorino
• B08: San Lazzaro di Savena
• B09: Capannoli, Italy Pietro Dora Vivarelli ASA
• B10: Observatoire du Mas des Gres, Moydans
• B11: Osservatorio Cima Rest, Imola
• B12: The Koschny Observatory, Noordwijkerhout
• B13: Osservatorio di Tradate
• B14: Ca del Monte
• B15: Inastars Observatory, Potsdam (since 2006)
• B16: 1st Moscow Gymnasium Observatory, Lipki
• B17: AZT-8 Evpatoria
• B18: Terskol
• B19: Observatori Iluro, Mataro
• B20: Observatori Carmelita, Tiana
• B21: Gaisberg Observatory (Sternwarte Gaisberg), Schaerding (Schärding, Austria)
• B22: Observatori d'Ager, Barcelona
• B23: Fiamene
• B24: Cesson
• B25: Catania
• B26: Observatoire des Terres Blanches, Reillanne
• B27: Picard Observatory, St. Veit
• B28: Mandi Observatory, Pagnacco, Italy
• B29: L'Ampolla Observatory, Tarragona
• B30: Szamotuly-Galowo, Poland
• B31: Southern African Large Telescope (SALT), Sutherland
• B32: Observatory Gelenau(Germany)
• B33: Libbiano Observatory, Peccioli - AAAV
• B34: Green Island Observatory, Gecitkale
• B35: Bareket observatory, Macabim, Israel.
• B36: Redshed Observatory, Kallham
• B37: Obs. de L' Ametlla del Valles, Barcelona
• B38: Santa Mama
• B39: Tradate
• B40: Skylive Observatory, Catania, Italy (Gruppo Astrofili Catanesi)
• B41: Zlin Observatory
• B42: Vitebsk
• B43: Hennef
• B44: Eygalayes
• B45: Narama
• B46: Sintini Observatory, Argenta
• B47: Metsala Observatory, Espoo
• B48: Bocholt
• B49: Paus Observatory, Sabadell
• B50: Corner Observatory, Durmersheim
• B51: Vallauris
• B52: Observatorio El Far
• B53: Casal Lumbroso, Rome
• B54: Ager
• B55: Comeglians
• B56: Observatorio Sant Pere, Mataro
• B57: Laietania Observatory, Parets del Valles
• B58: Polaris Observatory, Budapest
• B59: Borken
• B60: Deep Sky Observatorium, Bad Bentheim
• B61: Valldoreix Obs.,Sant Cugat del Valles
• B62: Brelingen
• B63: Solaris Observatory, Luczanowice
• B64: Slope Rock Observatory, Hyvinkaa
• B65: Komakallio Observatory, Kirkkonummi
• B66: Osservatorio di Casasco
• B67: Sternwarte Mirasteilas, Falera, Switzerland