Station instants computed with Swiss Ephemeris to the minute, in UTC. Mars is retrograde about 0.47 times a year for 58–81 days.
Mars is retrograde once in 2009: from Dec 20, 2009, 13:26 UTC at 19°41′ Leo until Mar 10, 2010, 17:09 UTC at 0°18′ Leo.
| Stations retrograde | At | Stations direct | At | Days | Arc | Pre-shadow from | Post-shadow to |
|---|---|---|---|---|---|---|---|
| Dec 20, 2009, 13:26 UTC * | 19°41′ Leo | Mar 10, 2010, 17:09 UTC | 0°18′ Leo | 80.15 | 19.40° | 0°18′ Leo | 19°41′ Leo |
* period crosses a year boundary and is listed in both years.
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