Astronomical Algorithms Retrograde dates computed for 2025

Mercury retrograde 2025

Mercury is retrograde three times in 2025: March 15 to April 7, July 18 to August 11 and November 9 to November 29.

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Mercury retrograde dates in 2025

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
23 9.6° Aries 26.8° Pisces Pisces
24 15.6° Leo 4.3° Leo Cancer
20 6.9° Sagittarius 20.7° Scorpio Scorpius, then Libra

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
March 1 March 15 March 24 April 7 April 26
June 30 July 18 July 31 August 11 August 25
October 21 November 9 November 20 November 29 December 17

Every planet in retrograde in 2025

The outer planets turn retrograde once a year, around their opposition, when Earth overtakes them. Every planet is retrograde at some point in 2025.

Planet Turns retrograde Turns direct Days Constellation In the middle
Uranus 151 Taurus, then Aries Opposition, November 17, 2024
Jupiter 118 Taurus Opposition, December 7, 2024
Mars 79 Cancer, then Gemini Opposition, January 16
Venus 42 Pisces Inferior conjunction, March 23
Mercury 23 Pisces Inferior conjunction, March 24
Neptune 159 Pisces Opposition, September 23
Saturn 138 Pisces Opposition, September 21
Mercury 24 Cancer Inferior conjunction, July 31
Uranus 151 Taurus Opposition, November 21
Mercury 20 Scorpius, then Libra Inferior conjunction, November 20
Jupiter 119 Gemini Opposition, January 10, 2026

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 2025?

Mercury is retrograde three times in 2025: March 15 to April 7, July 18 to August 11 and November 9 to November 29. 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 2025?

Uranus, Jupiter, Mars, Venus, Mercury, Neptune and Saturn. 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.