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Mercury retrograde 1964: 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 1964: from Dec 26, 1963, 09:40 UTC at 20°44′ Capricorn until Jan 15, 1964, 11:42 UTC at 4°30′ Capricorn; from Apr 16, 1964, 21:50 UTC at 11°31′ Taurus until May 10, 1964, 16:09 UTC at 1°31′ Taurus; from Aug 19, 1964, 14:14 UTC at 17°58′ Virgo until Sep 11, 1964, 17:48 UTC at 4°17′ Virgo; from Dec 9, 1964, 07:05 UTC at 4°53′ Capricorn until Dec 29, 1964, 02:15 UTC at 18°35′ Sagittarius.

Mercury retrograde periods in 1964

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 26, 1963, 09:40 UTC *	20°44′ Capricorn	Jan 15, 1964, 11:42 UTC	4°30′ Capricorn	20.08	16.24°	4°30′ Capricorn	20°44′ Capricorn
Apr 16, 1964, 21:50 UTC	11°31′ Taurus	May 10, 1964, 16:09 UTC	1°31′ Taurus	23.76	10.00°	1°31′ Taurus	11°31′ Taurus
Aug 19, 1964, 14:14 UTC	17°58′ Virgo	Sep 11, 1964, 17:48 UTC	4°17′ Virgo	23.15	13.67°	4°17′ Virgo	17°58′ Virgo
Dec 9, 1964, 07:05 UTC	4°53′ Capricorn	Dec 29, 1964, 02:15 UTC	18°35′ Sagittarius	19.8	16.31°	18°35′ Sagittarius	4°53′ Capricorn

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

Sign changes during retrograde

Instant (UTC)	From	To
Dec 16, 1964, 14:31 UTC	Capricorn	Sagittarius

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