, 捷克 (Hvězdárna Kle?)
047: Poznań, Poland (Obserwatorium Astronomiczne Uniwersytet im. Adama Mickiewicza w Poznaniu, Poznań Observatory)
048: 赫拉德茨-克拉洛韦, 捷克(赫拉德茨-克拉洛韦天文台)
049: Uppsala-Kvistaberg, Sweden (Kvistabergs Observatorium)
050: Stockholm (before 1931), Sweden (Stockholms observatorium)
051: Cape, South Africa (Royal Observatory at the Cape of Good Hope)
052: Stockholm-Saltsj?baden (since 1931), Sweden (Stockholms observatorium, Saltsj?baden Observatory)
053: Konkoly Observatory, Budapest (since 1934), Hungary (Konkoly Obszervatórium)
054: Brorfelde, Denmark (Brorfelde Observatoriet)
055: Kraków (Cracow), Poland (Kraków Observatory)
056: Skalnaté Pleso，斯洛伐克（岩湖天文台）
057: Belgrade, Serbia (Belgrade Astronomical Observatory(AOB); Астрономске опсерватори?е у Београду; Astronomske opservatorije u Beogradu)
058: K?nigsberg, German Empire (before 1944)
059: Lomnicky ?tít (Lomnicky peak, Slovakia)
060: Warsaw-Ostrowik, Poland (Warsaw University Observatory)
061: Uzhgorod, Ukraine
062: Turku, Finland (Iso-Heikkil? Observatory, University of Turku; Turun observatorio, Turun yliopisto)
063: Turku-Tuorla, Finland (Tuorla Observatory, University of Turku; Tuorlan observatorio, Turun yliopisto)
064: Turku-Kevola, Finland (Kevola Observatory, University of Turku; Kevolan t?htitorni, Turun yliopisto)
065: Traunstein, Germany
066: Athens, Greece (National Observatory of Athens)
067: Lvov University Observatory, Ukraine
068: Lvov Polytechnic Institute, Ukraine
069: Baldone, near Riga, Latvia
070: Vilno (before 1883), Russian Empire
071: Smolyan, Bulgaria (Bulgarian National Astronomical Observatory- Rozhen, Национална Астрономическа Обсерватория Рожен, a.k.a. Rozhen National Astronomical Observatory)
072: Scheuren Observatory, Germany
073: Bucharest, Romania
074: Boyden Observatory, Bloemfontein, South Africa
075: Tartu, Estonia (Tartu Observatory)
076: Johannesburg-Hartbeespoort, South Africa (Union Observatory Annex, Hartbeespoort)
077: Yale-Columbia Station, Johannesburg, South Africa (Yale-Columbia Southern Station, 1925–1951 [1])
078: Johannesburg, South Africa (Union Observatory)
079: Radcliffe Observatory, Pretoria, South Africa
080: Istanbul, Turkey
081: Leiden Station, Johannesburg, South Africa (Leiden Southern Station, Hartbeespoort)
082: St. P?lten , Austria
083: Golosseevo-Kiev, Ukraine
084: Pulkovo Observatory, Russia
085: Kiev, Ukraine
086: Odessa, Ukraine
087: Helwan, Egypt
088: Kottomia, Egypt
089: Nikolaev, Ukraine (Nikolaev Astronomical Observatory)
090: Mainz, Germany
091: Observatoire de Nurol, Aurec sur Loire, France
092: Torun-Piwnice, Poland (Piwnice Obserwatorium Astronomiczne; Piwnice Astronomical Observatory)
093: Skibotn, Norway
094: Crimea-Sime?s, Ukraine (Crimean Astrophysical Observatory-Simeis)
095: Crimea-Nauchnij, Ukraine (Crimean Astrophysical Observatory-Nauchnij)
096: Merate, Italy
097: Wise Observatory, Mitzpeh Ramon, Israel
098: Asiago Observatory, Cima Ekar, Italy (Stazione osservativa di Asiago Cima Ekar)
099: Lahti, Finland (Lahti Ursa Observatory; Lahden Ursan t?htitorni)
100-199100: ?ht?ri, Finland
101: Kharkov, Ukraine (Astronomical Observatory of Kharkov National University,