When Was Neptune Last in Gemini?
Updated October 5, 2026
As of October 2026, the last time was 1887–1902: Neptune first entered Gemini on 16 August 1887 and, because retrograde motion carried it back and forth across the sign's boundary, entered it four times in all before leaving for good on 21 May 1902. Next: Neptune first enters Gemini on 16 July 2051; retrograde motion carries it back and forth across the sign's boundary, so it enters three times in all and leaves for good on 1 May 2066.
Each bar runs from first entry to final exit. Stretches marked with a neighbouring sign are times it crossed back over the boundary before returning.
Every Neptune-in-Gemini pass, 1600–2600
Dates are in UTC and the Gregorian calendar; in a time zone far from Greenwich an ingress can fall on the neighbouring calendar day. Dates before 14 September 1752 are Gregorian too, though Britain and its colonies still used the Julian calendar, 10 days behind until 11 March 1700 and 11 days behind after, and began the year on 25 March.
| First entry | Final exit | Time in Gemini | Entered |
|---|---|---|---|
| 11 June 1724 | 6 June 1738 | 13 years | 3 times |
| In Gemini: 11 Jun 1724 – 3 Dec 1724 · 12 Apr 1725 – 6 Aug 1737 · 2 Dec 1737 – 6 Jun 1738 | |||
| 16 August 1887 | 21 May 1902 | 13 years | 4 times |
| In Gemini: 16 Aug 1887 – 20 Sept 1887 · 26 May 1888 – 27 Dec 1888 · 22 Mar 1889 – 19 Jul 1901 · 25 Dec 1901 – 21 May 1902 | |||
| 16 July 2051 | 1 May 2066 | 14 years | 3 times |
| In Gemini: 16 Jul 2051 – 22 Oct 2051 · 12 May 2052 – 3 Jul 2065 · 14 Jan 2066 – 1 May 2066 | |||
| 29 June 2215 | 9 April 2230 | 13 years | 4 times |
| In Gemini: 29 Jun 2215 – 13 Nov 2215 · 29 Apr 2216 – 29 Aug 2228 · 7 Nov 2228 – 20 Jun 2229 · 9 Feb 2230 – 9 Apr 2230 | |||
| 16 June 2379 | 7 June 2393 | 13 years | 3 times |
| In Gemini: 16 Jun 2379 – 29 Nov 2379 · 16 Apr 2380 – 8 Aug 2392 · 29 Nov 2392 – 7 Jun 2393 | |||
| 4 June 2543 | 26 May 2557 | 13 years | 3 times |
| In Gemini: 4 Jun 2543 – 15 Dec 2543 · 2 Apr 2544 – 25 Jul 2556 · 16 Dec 2556 – 26 May 2557 | |||
Search Neptune in Gemini in the app
Neptune retrograde in Gemini, the 2051–66 pass
Retrograde periods with at least one station in Gemini: the date Neptune stood still and turned retrograde, and the date it turned direct again.
| Stations retrograde | Stations direct |
|---|---|
| 3 September 2051 0°37′ Gemini | 7 February 2052 27°48′ Taurus |
| 4 September 2052 2°52′ Gemini | 8 February 2053 0°03′ Gemini |
| 7 September 2053 5°07′ Gemini | 11 February 2054 2°18′ Gemini |
| 9 September 2054 7°21′ Gemini | 13 February 2055 4°32′ Gemini |
| 12 September 2055 9°36′ Gemini | 16 February 2056 6°47′ Gemini |
| 13 September 2056 11°50′ Gemini | 17 February 2057 9°01′ Gemini |
| 16 September 2057 14°05′ Gemini | 20 February 2058 11°16′ Gemini |
| 18 September 2058 16°20′ Gemini | 22 February 2059 13°31′ Gemini |
| 21 September 2059 18°35′ Gemini | 24 February 2060 15°46′ Gemini |
| 22 September 2060 20°50′ Gemini | 26 February 2061 18°01′ Gemini |
| 25 September 2061 23°05′ Gemini | 1 March 2062 20°16′ Gemini |
| 28 September 2062 25°20′ Gemini | 3 March 2063 22°31′ Gemini |
| 30 September 2063 27°34′ Gemini | 5 March 2064 24°46′ Gemini |
| 2 October 2064 29°49′ Gemini | 7 March 2065 27°00′ Gemini |
| 4 October 2065 2°03′ Cancer | 10 March 2066 29°14′ Gemini |
How Neptune moves through the zodiac
Across 1600–2600, Neptune spent about 13 years to 14 years in a sign on each pass, not counting retrograde dips out of it, and it returned to the same sign about every 164 years. 100% of passes included at least one retrograde dip back over a sign boundary.
Neptune in other signs
Aries · Taurus · Gemini · Cancer · Leo · Virgo · Libra · Scorpio · Sagittarius · Capricorn · Aquarius · Pisces
Other planets in Gemini
Venus · Mars · Jupiter · Saturn · Chiron · Uranus · Neptune · Pluto
All planets in all signs · How to read these dates
How these dates were found
With Horoskopos's sky search: Neptune's geocentric, apparent, tropical ecliptic longitude, computed with the open-source Astronomy Engine library, with each sign boundary found to the minute. Sample ingresses agree with NASA JPL's Horizons ephemeris to within about three hours. Data generated 2026-10-04; page built 2026-10-05.