Plaskett's Star
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Plaskett's Star, also known as HR 2422 and V640 Monocerotis, is a spectroscopic binary at a distance of around 6600 light-years. It is one of the most massive binary stars known, with a total mass of around one hundred times that of the Sun. Wikipedia
Right ascension: 06h 37m 24.04130s
Apparent magnitude (V): 6.06
B−V color index: +0.05
Constellation: Monoceros
Distance: 5,245 ly; (1,608 pc)
U−B color index: –0.88