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Proper Name	None
Bayer Designation	None
Flamsteed Number	15 Monocerotis
HR (BSC)	2456
HD	47839
Variable Designation	S Monocerotis
Constellation	Monoceros
Right Ascension	6h 40m 59s
Declination	+9° 53' 45"
Distance	919 light years 282 parsecs
Magnitude	Apparent: +4.67 Absolute: -2.58
Spectral Class	O7V((f)) Blue-white main sequence star
Optimum Visibility	January

The complex multiple star 15 Monocerotis is the brightest member of the Christmas Tree Cluster, NGC 2264 in northern Monoceros. The illuminated gases surrounding the star and its companions are part of the extensive nebulous region extending from Cone Nebula, also designated NGC 2264, the star-forming region out of which 15 Monocerotis and its cluster emerged. Imagery provided by Aladin sky atlas

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