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 2099: from Sep 13, 2099, 23:03 UTC at 2°29′ Taurus until Nov 18, 2099, 11:45 UTC at 19°20′ Aries.
| Stations retrograde | At | Stations direct | At | Days | Arc | Pre-shadow from | Post-shadow to |
|---|---|---|---|---|---|---|---|
| Sep 13, 2099, 23:03 UTC | 2°29′ Taurus | Nov 18, 2099, 11:45 UTC | 19°20′ Aries | 65.53 | 13.15° | 19°20′ Aries | 2°29′ Taurus |
| Instant (UTC) | From | To |
|---|---|---|
| Oct 2, 2099, 18:01 UTC | Taurus | Aries |
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