Mercury retrograde 1991

4 periods, 70 days inside the year — 19.1% of 1991. Station times below are UTC and computed to the minute.

20 days · retreats 16.3° · crosses the year boundary

14 December → 3 January 1991 in Capricorn

Stations retrograde 14 Dec 1990, 20:55 UTC at 10.14° Capricorn
Stations direct 3 Jan 1991, 17:47 UTC at 23.83° Sagittarius
Shadow opens 27 Nov 1990 (18 days before)
Shadow closes 22 Jan 1991 (19 days after)
Full window including shadows 57 days

Read against Capricorn, and see that sign’s horoscope for the period.

24 days · retreats 11.04°

4 April → 28 April 1991 in Aries

Stations retrograde 4 Apr 1991, 18:12 UTC at 29.15° Aries
Stations direct 28 Apr 1991, 09:36 UTC at 18.11° Aries
Shadow opens 21 Mar 1991 (14 days before)
Shadow closes 16 May 1991 (18 days after)
Full window including shadows 55 days

Read against Aries, and see that sign’s horoscope for the period.

24 days · retreats 12.86°

7 August → 31 August 1991 in Virgo

Stations retrograde 7 Aug 1991, 23:44 UTC at 6.02° Virgo
Stations direct 31 Aug 1991, 14:29 UTC at 23.16° Leo
Shadow opens 19 Jul 1991 (19 days before)
Shadow closes 14 Sep 1991 (14 days after)
Full window including shadows 57 days

Read against Virgo, and see that sign’s horoscope for the period.

20 days · retreats 16.29°

28 November → 18 December 1991 in Sagittarius

Stations retrograde 28 Nov 1991, 16:52 UTC at 24.3° Sagittarius
Stations direct 18 Dec 1991, 11:06 UTC at 8.01° Sagittarius
Shadow opens 10 Nov 1991 (18 days before)
Shadow closes 5 Jan 1992 (18 days after)
Full window including shadows 57 days

Read against Sagittarius, and see that sign’s horoscope for the period.

Computed from the actual motion

The nearest Mercury retrogrades either side of 1991

Previous

1990 Ended 3 January 1991 after 20 days, moving back 16.3° through the zodiac.

Next

1992 Begins 17 March 1992 and runs 23 days.

Gap across 1991

1.2 years between the two — long enough for a whole calendar year to fall inside it with nothing to report.

Both dates are computed from the planet’s apparent motion, not taken from a table. A retrograde begins the moment its daily movement against the stars turns negative, and that moment is findable to the hour.