In 1957, Mercury has four retrograde periods: in Capricorn, Taurus, Virgo and Sagittarius. The first begins on January 1. The last begins on December 16 and runs into the new year.
Retrograde periods in 1957
January 1 – January 21
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Capricorn
- Length
- 20 days
April 25 – May 18
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Taurus
- Length
- 23 days
August 27 – September 18
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Virgo
- Length
- 22 days
December 16, 1957 – January 5, 1958
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- from Capricorn into Sagittarius
- Length
- 20 days