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 2040: from Nov 23, 2039, 20:48 UTC at 21°45′ Cancer until Feb 9, 2040, 11:48 UTC at 3°02′ Cancer.
| Stations retrograde | At | Stations direct | At | Days | Arc | Pre-shadow from | Post-shadow to |
|---|---|---|---|---|---|---|---|
| Nov 23, 2039, 20:48 UTC * | 21°45′ Cancer | Feb 9, 2040, 11:48 UTC | 3°02′ Cancer | 77.63 | 18.73° | 3°02′ Cancer | 21°45′ Cancer |
* period crosses a year boundary and is listed in both years.
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