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What year were these space objects discovered 1600-1950

Given a space object, type the year discovered
Years are based on years observed not years published
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IridiumPingo
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Last updated: December 21, 2025
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First submittedDecember 21, 2025
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Planet
Year
Ganymeade
1610
Callisto
1610
Io
1610
Europa
1610
Titan
1655
Iapetus
1671
Rhea
1672
Tethys
1684
Dione
1684
Uranus
1781
Titania
1787
Oberon
1787
Enceladus
1789
Mimas
1789
Ceres
1801
Neptune
1846
Triton
1846
Planet
Year
Hyperion
1846
Ariel
1851
Umbriel
1851
Deimos
1877
Phobos
1877
Amalthea
1892
Phobe
1898
Himalia
1904
Elera
1905
Pasiphae
1908
Sinope
1914
Pluto
1930
Lysithea
1938
Carme
1938
Miranda
1948
Nereid
1949
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