List of craters of the moon / O

Surname	Named after	location	Mean diameter (km)
Oberth	Hermann Oberth	62 ° 24 ′ 0 ″  N , 155 ° 24 ′ 0 ″  E	60
Obruchev	Vladimir A. Obruchev	38 ° 54 ′ 0 ″  S , 162 ° 6 ′ 0 ″  E	71
O'Day	Marcus O'Day	30 ° 36 ′ 0 ″  S , 157 ° 30 ′ 0 ″  E	71
Oenopides	Enopides of Chios	57 ° 0 ′ 0 ″  N , 64 ° 6 ′ 0 ″  W.	67
Oersted	Hans Christian Ørsted	43 ° 6 ′ 0 ″  N , 47 ° 12 ′ 0 ″  E	42
ohm	Georg Simon Ohm	18 ° 24 ′ 0 ″  N , 113 ° 30 ′ 0 ″  W.	64
Ok	Lorenz Okenfuss	43 ° 42 ′ 0 ″  S , 75 ° 54 ′ 0 ″  E	71
Olbers	Heinrich Wilhelm Malthaus Olbers	7 ° 24 ′ 0 ″  N , 75 ° 54 ′ 0 ″  W.	74
Olcott	William T. Olcott	20 ° 36 ′ 0 ″  N , 117 ° 48 ′ 0 ″  E	81
Olivier	Charles Pollard Olivier	59 ° 6 ′ 0 ″  N , 138 ° 30 ′ 0 ″  E	69
Omar Khayyam	Omar Chayyam	58 ° 0 ′ 0 ″  N , 102 ° 6 ′ 0 ″  W.	70
Onizuka	Ellison Shoji Onizuka	36 ° 12 ′ 0 ″  S , 148 ° 54 ′ 0 ″  W.	29
Opelt	Friedrich Wilhelm Opelt	16 ° 18 ′ 0 ″  S , 17 ° 30 ′ 0 ″  W.	48
Oppenheimer	Robert Oppenheimer	35 ° 12 ′ 0 ″  S , 166 ° 18 ′ 0 ″  W.	208
Oppolzer	Theodor Egon from Oppolzer	1 ° 30 ′ 0 ″  S , 0 ° 30 ′ 0 ″  W.	40
Oresme	Nicholas of Oresme	42 ° 24 ′ 0 ″  S , 169 ° 12 ′ 0 ″  E	76
Orlov	Aleksandr V. Orlov Sergei V. Orlov	25 ° 42 ′ 0 ″  S , 175 ° 0 ′ 0 ″  W.	81
Orontius	Orontius Finnaeus	40 ° 36 ′ 0 ″  S , 4 ° 36 ′ 0 ″  W.	105
Osama	Arabic male name	18 ° 36 ′ 0 ″  N , 5 ° 12 ′ 0 ″  E	0.5
Osiris	Osiris	18 ° 36 ′ 0 ″  N , 27 ° 36 ′ 0 ″  E	1
Osman	Turkish male name	11 ° 0 ′ 0 ″  S , 6 ° 12 ′ 0 ″  W.	2
Ostwald	Wilhelm Ostwald	10 ° 24 ′ 0 ″  N , 121 ° 54 ′ 0 ″  E	104