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 1973: from Sep 19, 1973, 23:20 UTC at 9°16′ Taurus until Nov 26, 1973, 00:06 UTC at 25°18′ Aries.
| Stations retrograde | At | Stations direct | At | Days | Arc | Pre-shadow from | Post-shadow to |
|---|---|---|---|---|---|---|---|
| Sep 19, 1973, 23:20 UTC | 9°16′ Taurus | Nov 26, 1973, 00:06 UTC | 25°18′ Aries | 67.03 | 13.97° | 25°18′ Aries | 9°16′ Taurus |
| Instant (UTC) | From | To |
|---|---|---|
| Oct 29, 1973, 22:56 UTC | Taurus | Aries |
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