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 1909: from Aug 23, 1909, 02:20 UTC at 6°48′ Aries until Oct 24, 1909, 07:16 UTC at 25°27′ Pisces.
| Stations retrograde | At | Stations direct | At | Days | Arc | Pre-shadow from | Post-shadow to |
|---|---|---|---|---|---|---|---|
| Aug 23, 1909, 02:20 UTC | 6°48′ Aries | Oct 24, 1909, 07:16 UTC | 25°27′ Pisces | 62.21 | 11.35° | 25°27′ Pisces | 6°48′ Aries |
| Instant (UTC) | From | To |
|---|---|---|
| Sep 26, 1909, 21:20 UTC | Aries | Pisces |
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