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Theta Geminorum
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Gemini
Right ascension 6h 52m 47.3s
Declination 33° 57' 40"
Apparent magnitude (V) 3.60
Distance 206 ly
(63.19 pc)
Spectral type A3III
Other designations
34 Geminorum, HD 50019, HR 2540, SAO 59570, FK5 261, NSV --, BD +34 1481 , HIP 33018

Theta Geminorum (θ Gem / θ Geminorum) is a Class A3, fourth-magnitude star in the constellation Gemini. A seldom used proper name for this star is Nageba, derived from the Arabic title التوامان النجيبة Al-Tawa'man Al-Najibah meaning "The Highborn Twins", referring to the belief that the twins were the divinely ordained sons of a king.

Theta Geminorum is a binary star with components of magnitudes 3.60 and 5.18, separated by 2.9 arcseconds. This stellar system is located about 200 light-years from Earth.


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