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DIMANCHE 16 AOÛT 2026 À 09:17 UTC+2

Observation of the Gemini constellation

Visualize in real time the position of the Gemini constellation in the sky.

General presentation

Gemini is one of the most recognizable zodiacal constellations in the northern hemisphere's winter sky. It is visible mainly in winter and early spring, when it peaks high in the night sky. This constellation is easy to spot because it contains two bright stars close together, giving the impression of two parallel figures in the sky. Thanks to its position on the ecliptic, Gemini is crossed by the Sun once a year and serves as an important reference in astronomy and observation of the sky.

Shape of the Gemini constellation

The constellation of Gemini has a very characteristic shape composed of two parallel lines of stars, representing the twins. These two columns seem to descend side by side in the sky. They are dominated by two very bright stars: Castor and Pollux, which mark the heads of both characters.

Stars of the Gemini constellation

StarMagnitudeDistanceEquatorial position J2000Current Equatorial PositionCurrent Horizontal Position at MarseilleLink
Castor1.9251 light yearsRight ascension :
7ʰ34ᵐ35.873ˢ
Declination : 31°53'35.873″		Right ascension :
7ʰ36ᵐ17.2684639837ˢ
Declination :
31°49′42.5407647474″		Azimut :
-78.73182790153513°
Altitude :
60.5665974743678°
Pollux1.1433.78 light yearsRight ascension :
7ʰ45ᵐ18.95ˢ
Declination : 28°1'18.95″		Right ascension :
7ʰ46ᵐ57.2062480963ˢ
Declination :
27°57′24.442878413″		Azimut :
-75.20339635084085°
Altitude :
56.450018951664354°
Alhena1.93109 light yearsRight ascension :
6ʰ37ᵐ42.711ˢ
Declination : 16°23'42.711″		Right ascension :
6ʰ39ᵐ14.5309451902ˢ
Declination :
16°22′38.6809750049″		Azimut :
-38.93756117785821°
Altitude :
58.02603354863567°
Mebsuta3.2870 light yearsRight ascension :
6ʰ43ᵐ56ˢ
Declination : 25°7'56″		Right ascension :
6ʰ45ᵐ33.9457737319ˢ
Declination :
25°6′16.6661073894″		Azimut :
-51.59434372457659°
Altitude :
64.4956383759575°
Tejat2.9232 light yearsRight ascension :
6ʰ22ᵐ58ˢ
Declination : 22°30'58″		Right ascension :
6ʰ24ᵐ34.1229955853ˢ
Declination :
22°30′3.8549449668″		Azimut :
-38.822272689289996°
Altitude :
65.05785685935881°
Propus3.3380 light yearsRight ascension :
6ʰ14ᵐ52ˢ
Declination : 22°30'52″		Right ascension :
6ʰ16ᵐ28.3666914924ˢ
Declination :
22°29′54.1993783876″		Azimut :
-34.84389500081737°
Altitude :
65.93881446426474°
Wasat3.5560.5 light yearsRight ascension :
7ʰ20ᵐ7ˢ
Declination : 21°58'7″		Right ascension :
7ʰ21ᵐ41.922755369ˢ
Declination :
21°55′59.6602127544″		Azimut :
-60.10630109394342°
Altitude :
56.65751537633816°
Mekbuda3.91168 light yearsRight ascension :
7ʰ4ᵐ6ˢ
Declination : 20°34'6″		Right ascension :
7ʰ5ᵐ40.3296382394ˢ
Declination :
20°31′52.6606464886″		Azimut :
-53.16099753389393°
Altitude :
58.03019737606064°
Theta Geminorum3.59189 light yearsRight ascension :
6ʰ52ᵐ47.3388ˢ
Declination : 33°57'47.3388″		Right ascension :
6ʰ54ᵐ32.0821482093ˢ
Declination :
33°55′42.353289001″		Azimut :
-71.55184255213689°
Altitude :
69.05762816719488°
Kappa Geminorum3.57141 light yearsRight ascension :
7ʰ44ᵐ26.854ˢ
Declination : 24°23'26.854″		Right ascension :
7ʰ46ᵐ2.6265910994ˢ
Declination :
24°20′3.6621792863″		Azimut :
-70.03834239054584°
Altitude :
54.31347075906082°
Lambda Geminorum3.58100.9 light yearsRight ascension :
7ʰ18ᵐ5.58ˢ
Declination : 16°32'5.58″		Right ascension :
7ʰ19ᵐ36.9251343251ˢ
Declination :
16°29′33.9121361156″		Azimut :
-53.37256781679838°
Altitude :
52.813390639489185°
Xi Geminorum3.3658.7 light yearsRight ascension :
6ʰ45ᵐ17.36ˢ
Declination : 12°53'17.36″		Right ascension :
6ʰ46ᵐ46.5631590877ˢ
Declination :
12°52′5.3865284357″		Azimut :
-38.84523352838858°
Altitude :
54.07226769577912°
Nu Geminorum4.16540 light yearsRight ascension :
6ʰ28ᵐ57.786ˢ
Declination : 20°12'57.786″		Right ascension :
6ʰ30ᵐ32.3798755098ˢ
Declination :
20°11′43.5066940611″		Azimut :
-39.001503963452116°
Altitude :
62.36670058392551°
Tau Geminorum4.42321 light yearsRight ascension :
7ʰ11ᵐ8.3704ˢ
Declination : 30°14'8.3704″		Right ascension :
7ʰ12ᵐ49.4908009314ˢ
Declination :
30°12′3.5039872182″		Azimut :
-69.66106288380092°
Altitude :
63.73508300601478°
Iota Geminorum3.79120.4 light yearsRight ascension :
7ʰ25ᵐ43.595ˢ
Declination : 27°47'43.595″		Right ascension :
7ʰ27ᵐ22.3246584062ˢ
Declination :
27°44′40.0003051505″		Azimut :
-69.81009878085116°
Altitude :
59.71652871100494°
Upsilon Geminorum4.04270 light yearsRight ascension :
7ʰ35ᵐ55.35ˢ
Declination : 26°53'55.35″		Right ascension :
7ʰ37ᵐ33.0435935098ˢ
Declination :
26°50′12.6415876616″		Azimut :
-71.22227256684354°
Altitude :
57.39373766091088°