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Mercury retrograde 1951: exact dates and times

Station instants computed with Swiss Ephemeris to the minute, in UTC. Mercury is retrograde about 3.3 times a year for 19–24 days.

Mercury is retrograde 4 times in 1951: from Dec 23, 1950, 14:48 UTC at 18°11′ Capricorn until Jan 12, 1951, 15:34 UTC at 1°55′ Capricorn; from Apr 14, 1951, 17:50 UTC at 8°34′ Taurus until May 8, 1951, 11:50 UTC at 28°21′ Aries; from Aug 17, 1951, 14:04 UTC at 15°09′ Virgo until Sep 9, 1951, 20:22 UTC at 1°38′ Virgo; from Dec 7, 1951, 11:57 UTC at 2°20′ Capricorn until Dec 27, 1951, 06:38 UTC at 16°01′ Sagittarius.

Mercury retrograde periods in 1951

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 23, 1950, 14:48 UTC *	18°11′ Capricorn	Jan 12, 1951, 15:34 UTC	1°55′ Capricorn	20.03	16.26°	1°55′ Capricorn	18°11′ Capricorn
Apr 14, 1951, 17:50 UTC	8°34′ Taurus	May 8, 1951, 11:50 UTC	28°21′ Aries	23.75	10.21°	28°21′ Aries	8°34′ Taurus
Aug 17, 1951, 14:04 UTC	15°09′ Virgo	Sep 9, 1951, 20:22 UTC	1°38′ Virgo	23.26	13.51°	1°38′ Virgo	15°09′ Virgo
Dec 7, 1951, 11:57 UTC	2°20′ Capricorn	Dec 27, 1951, 06:38 UTC	16°01′ Sagittarius	19.78	16.31°	16°01′ Sagittarius	2°20′ Capricorn

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

Sign changes during retrograde

Instant (UTC)	From	To
May 1, 1951, 21:25 UTC	Taurus	Aries
Dec 12, 1951, 12:40 UTC	Capricorn	Sagittarius

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