In 2010, Mercury has four retrograde periods: in Capricorn, Taurus, Virgo and Sagittarius. The year opens with a retrograde carried over from the year before; it ends on January 15. The last ends on December 30.
Retrograde periods in 2010
December 26, 2009 – January 15, 2010
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Capricorn
- Length
- 20 days
April 18 – May 11
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Taurus
- Length
- 23 days
August 20 – September 12
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Virgo
- Length
- 23 days
December 10 – December 30
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- from Capricorn into Sagittarius
- Length
- 20 days