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Proper NameNone
Bayer DesignationNone
Flamsteed Number2 Monocerotis
HR (BSC)2108
Right Ascension5h 59m 4s
Declination-9° 33' 30"
Distance289 light years
88 parsecs
MagnitudeApparent: +5.03
Absolute: +0.31
Spectral ClassA5mF0III white giant
Optimum VisibilityJanuary
NotesA hot giant star in Monoceros, a few degrees eastward of the feet of Orion. The primary of this system is some three times the diameter of the Sun, and is known to be a spectroscopic binary: variations in its spectrum reveal an orbiting companion star.

The slightly fainter star to the north of 2 Monocerotis is the pulsating variable 1 Monocerotis. These two stars are relatively close neighbours in space, lying a little over twenty light years from one another. Imagery provided by Aladin sky atlas


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