Astronomical Algorithms Retrograde dates computed for 2029

Mercury retrograde 2029

Mercury is retrograde four times in 2029: January 7 to January 27, May 1 to May 25, September 2 to September 25 and December 22 to January 11, 2030.

‹ 2028 2029

Mercury retrograde dates in 2029

Is Mercury retrograde right now? Yes. On November 12, 2026 Mercury is in retrograde motion, until November 13.

Turns retrograde Turns direct Days From Back to Constellation
20 3.6° Aquarius 17.5° Capricorn Capricornus, then Sagittarius
24 26.7° Taurus 17.6° Taurus Taurus, then Aries
23 1.8° Libra 17.4° Virgo Virgo, then Leo
20 17.7° Capricorn 1.4° Capricorn Sagittarius

Dates are in Universal Time. "From" and "Back to" give the ecliptic longitude of Mercury at the two turning points, in the tropical zodiac (30° signs counted from the vernal equinox). The constellation is the one Mercury is actually in front of, which no longer matches the sign because of precession.

Each retrograde period, step by step

Mercury crosses the same stretch of sky three times: forward, backward, then forward again. It enters that stretch two to three weeks before it turns retrograde and leaves it two to three weeks after it turns direct. Astrologers call these two intervals the shadow periods. In the middle, Mercury passes between Earth and the Sun (inferior conjunction).

Enters the zone Turns retrograde Inferior conjunction Turns direct Leaves the zone
December 21, 2028 January 7 January 16 January 27 February 16
April 17 May 1 May 12 May 25 June 10
August 13 September 2 September 15 September 25 October 9
December 4 December 22 December 31 January 11, 2030 January 30, 2030

Every planet in retrograde in 2029

The outer planets turn retrograde once a year, around their opposition, when Earth overtakes them. Every planet is retrograde at some point in 2029.

Planet Turns retrograde Turns direct Days Constellation In the middle
Saturn 136 Aries Opposition, October 30, 2028
Uranus 150 Taurus Opposition, December 3, 2028
Mercury 20 Capricornus, then Sagittarius Inferior conjunction, January 16
Jupiter 123 Virgo Opposition, April 12
Mars 80 Virgo Opposition, March 25
Mercury 24 Taurus, then Aries Inferior conjunction, May 12
Neptune 158 Pisces Opposition, October 2
Mercury 23 Virgo, then Leo Inferior conjunction, September 15
Saturn 135 Taurus, then Aries Opposition, November 13
Uranus 150 Taurus Opposition, December 8
Venus 41 Sagittarius Inferior conjunction, January 6, 2030
Mercury 20 Sagittarius Inferior conjunction, December 31

What retrograde motion is

Seen from Earth, the planets normally drift eastward against the stars, in the direction of their orbit. Retrograde motion is the interval when a planet appears to drift westward instead. Nothing changes in its orbit: it is an effect of perspective between two worlds moving at different speeds around the Sun.

Mercury is the fastest planet. Every 116 days, its synodic period, it catches up with Earth and passes between us and the Sun. For about three weeks around that passage, as it overtakes us on the inside, it slides backward in front of the stars. That happens three times in most years, four in some.

You can watch it happen: in the 3D heliocentric view, press Play and watch Mercury overtake Earth on the inside.

How these dates are computed

The position of Mercury comes from the VSOP87 theory as given in Jean Meeus' Astronomical Algorithms, corrected for the time its light takes to reach Earth. A period begins and ends on the two days when the geocentric ecliptic longitude stops changing: the stations. Because the planet is almost motionless there, the instant is only defined to within a few hours, and the dates are given to the day.

Frequently asked questions

When is Mercury retrograde in 2029?

Mercury is retrograde four times in 2029: January 7 to January 27, May 1 to May 25, September 2 to September 25 and December 22 to January 11, 2030. Dates are in Universal Time.

Is Mercury retrograde right now?

Yes. On November 12, 2026 Mercury is in retrograde motion, until November 13.

Which planets are retrograde in 2029?

Saturn, Uranus, Mercury, Jupiter, Mars, Neptune and Venus. The table on this page gives the first and last day of each period.

Does Mercury really move backwards?

No. Mercury always orbits the Sun in the same direction. About every 116 days it passes between Earth and the Sun, and for some three weeks its faster motion makes it drift westward against the background stars as seen from Earth, the way a car you overtake seems to move backwards.