Mars retrograde 1990

1 period, 72 days inside the year — 19.8% of 1990. Station times below are UTC and computed to the minute.

73 days · retreats 16.81° · crosses the year boundary

20 October → 1 January 1991 in Gemini

Stations retrograde 20 Oct 1990, 20:20 UTC at 14.68° Gemini
Stations direct 1 Jan 1991, 13:21 UTC at 27.87° Taurus
Shadow opens 27 Aug 1990 (55 days before)
Shadow closes 2 Mar 1991 (60 days after)
Full window including shadows 188 days

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

Computed from the actual motion

The nearest Mars retrogrades either side of 1990

Previous

1988 Ended 28 October 1988 after 63 days, moving back 11.59° through the zodiac.

Next

1991 Begins 22 November 1990 and runs 41 days.

Gap across 1990

2.1 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.