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Mercury retrograde 1991: 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 1991: from Dec 14, 1990, 21:09 UTC at 10°01′ Capricorn until Jan 3, 1991, 17:51 UTC at 23°43′ Sagittarius; from Apr 4, 1991, 18:09 UTC at 29°01′ Aries until Apr 28, 1991, 09:49 UTC at 17°59′ Aries; from Aug 7, 1991, 23:58 UTC at 5°55′ Virgo until Aug 31, 1991, 14:34 UTC at 23°03′ Leo; from Nov 28, 1991, 17:01 UTC at 24°11′ Sagittarius until Dec 18, 1991, 11:12 UTC at 7°55′ Sagittarius.

Mercury retrograde periods in 1991

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 14, 1990, 21:09 UTC *	10°01′ Capricorn	Jan 3, 1991, 17:51 UTC	23°43′ Sagittarius	19.86	16.30°	23°43′ Sagittarius	10°01′ Capricorn
Apr 4, 1991, 18:09 UTC	29°01′ Aries	Apr 28, 1991, 09:49 UTC	17°59′ Aries	23.65	11.04°	17°59′ Aries	29°01′ Aries
Aug 7, 1991, 23:58 UTC	5°55′ Virgo	Aug 31, 1991, 14:34 UTC	23°03′ Leo	23.61	12.86°	23°03′ Leo	5°55′ Virgo
Nov 28, 1991, 17:01 UTC	24°11′ Sagittarius	Dec 18, 1991, 11:12 UTC	7°55′ Sagittarius	19.76	16.28°	7°55′ Sagittarius	24°11′ Sagittarius

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

Sign changes during retrograde

Instant (UTC)	From	To
Dec 25, 1990, 22:57 UTC	Capricorn	Sagittarius
Aug 19, 1991, 21:40 UTC	Virgo	Leo

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How Mercury retrograde hits your chart

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