| areo.info / MER / Opportunity / | Sol 4222 Sol 4221 Sol 4220 |
| Sol 4221 local noon on Opportunity landing site was 2015-12-09 04:56 UTC on Earth. | last modified: 2016-01-31 21:49 UTC |
| All Mars images derived from original data published by NASA and JPL on Marsrover Image Gallery and exploratorium.edu. | |