Mercury retrograde 1990

4 periods, 83 days inside the year — 22.8% of 1990. Station times below are UTC and computed to the minute.

20 days · retreats 16.2° · crosses the year boundary

30 December → 20 January 1990 in Capricorn

Stations retrograde 30 Dec 1989, 23:15 UTC at 26.03° Capricorn
Stations direct 20 Jan 1990, 04:33 UTC at 9.84° Capricorn
Shadow opens 14 Dec 1989 (17 days before)
Shadow closes 8 Feb 1990 (20 days after)
Full window including shadows 57 days

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

24 days · retreats 9.61°

23 April → 17 May 1990 in Taurus

Stations retrograde 23 Apr 1990, 06:45 UTC at 17.66° Taurus
Stations direct 17 May 1990, 02:03 UTC at 8.05° Taurus
Shadow opens 9 Apr 1990 (14 days before)
Shadow closes 2 Jun 1990 (17 days after)
Full window including shadows 54 days

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

23 days · retreats 13.98°

25 August → 17 September 1990 in Virgo

Stations retrograde 25 Aug 1990, 13:50 UTC at 23.69° Virgo
Stations direct 17 Sep 1990, 12:01 UTC at 9.71° Virgo
Shadow opens 5 Aug 1990 (20 days before)
Shadow closes 1 Oct 1990 (14 days after)
Full window including shadows 57 days

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

20 days · retreats 16.3° · 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.

Computed from the actual motion

The nearest Mercury retrogrades either side of 1990

Previous

1989 Ended 20 January 1990 after 20 days, moving back 16.2° through the zodiac.

Next

1991 Begins 14 December 1990 and runs 20 days.

Gap across 1990

0.9 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.