orbit epoch 00:21 00:21 02:18 02:18 04:15 04:15 06:12 06:12 08:09 08:09 10:07 10:07 12:04 12:04 14:01 14:01 15:58 15:58 17:56 17:56 19:53 19:53 21:50 21:50 23:47 23:47