Mars retrograde 1915: exact dates and times

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 1915: from Dec 31, 1915, 22:29 UTC at 29°49′ Leo until Mar 21, 1916, 14:43 UTC at 10°20′ Leo.

Mars retrograde periods in 1915

All instants UTC. Arc = degrees travelled backwards between the two stations.
Stations retrograde	At	Stations direct	At	Days	Arc	Pre-shadow from	Post-shadow to
Dec 31, 1915, 22:29 UTC *	29°49′ Leo	Mar 21, 1916, 14:43 UTC	10°20′ Leo	80.68	19.50°	10°20′ Leo	29°49′ Leo

* period crosses a year boundary and is listed in both years.

✦ By Yuri Kan · verified against Swiss Ephemeris (JPL DE441) computations · Methodology · Updated 2026-09-05

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