Astronomical lunar position

Moon Through the Zodiac

Follow the Moon's calculated geocentric longitude as it moves through the twelve equal sectors of the tropical zodiac.

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♊ Gemini 21.4° into sign
Thursday, 29 October 2026

Moon in Gemini

The Moon's calculated geocentric longitude places it in the Gemini sector of the tropical zodiac.

Longitude
81.4°
Within sign
21.4°
Moon phase
🌖 Waning Gibbous
Illuminated
87.8%
Traditional element
Air
Traditional quality
Mutable

Coordinate system: geocentric tropical ecliptic of date. Positions are calculated estimates intended for general sky tracking.

The simple version

How does the Moon get a zodiac sign?

Imagine standing at the centre of Earth and drawing a straight line towards the Moon. Where that line points on the zodiac circle supplies the Moon's sign and degree.

Diagram of the Moon's longitude and zodiac sector Earth is at the centre. The Moon's direction intersects the Gemini sector at 81.4° longitude. ♈ ♉ ♊ ♋ ♌ ♍ ♎ ♏ ♐ ♑ ♒ ♓ 0° Aries Earth centre Moon
81.4° = Gemini 21.4°
The picture is not to scale. The ring shows direction around the ecliptic, viewed from Earth's centre.
1

Begin at Aries zero

The tropical zodiac starts at 0° Aries, the direction of the March equinox.

2

Measure around the ecliptic

The red line is the Moon's geocentric longitude: 81.4° on this date.

3

Find the 30-degree sector

Gemini begins at 60°. The Moon's longitude falls inside that sector.

4

Count within the sign

81.4° minus 60° gives 21.4° into Gemini.

The key idea: the zodiac sign describes the Moon's direction from Earth. It does not mean the Moon has entered a physical ring or moved close to those stars.

The Moon's two-week journey

The Moon normally crosses a zodiac sector in roughly two to three days, though its changing orbital speed means the interval is not perfectly uniform.

♉ Taurus 7.4° 🌕 100% ♉ Taurus 22° 🌕 98% ♊ Gemini 6.7° 🌖 94% ♊ Gemini 21.4° 🌖 88% ♋ Cancer 6° 🌖 80% ♋ Cancer 20.4° 🌖 71% ♌ Leo 4.5° 🌗 61% ♌ Leo 18.4° 🌗 50% ♍ Virgo 2° 🌗 40% ♍ Virgo 15.3° 🌘 30% ♍ Virgo 28.5° 🌘 20% ♎ Libra 11.5° 🌘 13% ♎ Libra 24.3° 🌘 6% ♏ Scorpio 7° 🌑 2%

Upcoming sign crossings

Transition times are refined from the calculated lunar longitude and shown in UTC.

Gemini to Cancer
Cancer to Leo
Leo to Virgo
Virgo to Libra
Libra to Scorpio

What this tracker measures

A real Moon coordinate

This tracker calculates the Moon's geocentric ecliptic longitude from lunar orbital elements and the main periodic perturbations. The result changes with the Moon's motion, not with the month printed on a calendar.

Tropical signs are equal sectors

The tropical zodiac divides the ecliptic into twelve equal 30-degree sectors beginning at the March equinox. These familiar signs are a coordinate convention; the official astronomical constellations have unequal boundaries and are not identical to these sectors.

Geocentric versus what you see

Geocentric means the position is calculated from Earth's centre. A nearby object such as the Moon can appear slightly displaced from a particular place on Earth's surface because of parallax.

Coordinate background: NASA's ecliptic definition, the U.S. Naval Observatory glossary, and JPL Horizons documentation.