1 Geminorum

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1 Geminorum
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Gemini
Right ascension 06h 04m 07.21544s [1]
Declination +23° 15′ 48.0401″ [1]
Spectral type G5III [1]

1 Geminorum (1 Gem) is a star in the constellation Gemini. Its apparent magnitude is 4.15. 1 Geminorum is considered to be on the west side boundary of the constellation of the Gemini figure. This was found in the 19th century by John Flamsteed in a study measuring telescopic positions and they were numbered west to east with their parent.[2]


  1. ^ a b c SIMBAD, 1 Geminorum (accessed 16 September 2012)
  2. ^ http://stars.astro.illinois.edu/sow/1gem.html