List of Mars craters / O

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Surname Named after location Mean
diameter (km)
Ocampo Ocampo , city in Mexico 32.7 ° N
138.2 ° E
7.1
Ohara Ohara , city in Japan 4.9 ° N
82.4 ° E
10.8
Orson Welles Orson Welles , American film director, actor, and writer 0.19 ° S
314.1 ° E
115.99