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Mercury retrograde 1971: 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 1971: from Dec 19, 1970, 05:59 UTC at 14°05′ Capricorn until Jan 8, 1971, 04:36 UTC at 27°49′ Sagittarius; from Apr 9, 1971, 17:11 UTC at 3°46′ Taurus until May 3, 1971, 10:25 UTC at 23°09′ Aries; from Aug 12, 1971, 19:13 UTC at 10°34′ Virgo until Sep 5, 1971, 06:02 UTC at 27°22′ Leo; from Dec 3, 1971, 02:33 UTC at 28°16′ Sagittarius until Dec 22, 1971, 20:47 UTC at 11°58′ Sagittarius.

Mercury retrograde periods in 1971

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 19, 1970, 05:59 UTC *	14°05′ Capricorn	Jan 8, 1971, 04:36 UTC	27°49′ Sagittarius	19.94	16.28°	27°49′ Sagittarius	14°05′ Capricorn
Apr 9, 1971, 17:11 UTC	3°46′ Taurus	May 3, 1971, 10:25 UTC	23°09′ Aries	23.72	10.62°	23°09′ Aries	3°46′ Taurus
Aug 12, 1971, 19:13 UTC	10°34′ Virgo	Sep 5, 1971, 06:02 UTC	27°22′ Leo	23.45	13.19°	27°22′ Leo	10°34′ Virgo
Dec 3, 1971, 02:33 UTC	28°16′ Sagittarius	Dec 22, 1971, 20:47 UTC	11°58′ Sagittarius	19.76	16.30°	11°58′ Sagittarius	28°16′ Sagittarius

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

Sign changes during retrograde

Instant (UTC)	From	To
Jan 2, 1971, 23:36 UTC	Capricorn	Sagittarius
Apr 18, 1971, 21:52 UTC	Taurus	Aries
Aug 29, 1971, 20:41 UTC	Virgo	Leo

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