Matches in DBpedia 2014 for { ?s ?p S Monocerotis, also known as 15 Monocerotis, is a massive variable star system located in the constellation Monoceros. It is a spectroscopic binary system with an orbital period of 74 years. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. It is a type O main sequence dwarf varying in between magnitude 4.2 and 4.6. The star lies at the base of the Christmas Tree Cluster in NGC 2264.Physical data for the system is disputed. The Washington Double Star catalog reports it as having 8 components. From orbital parameters and association with NGC 2264 it is given a distance of 720pc, but the Hipparcos parallax suggests less than half that.. }
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- S_Monocerotis abstract "S Monocerotis, also known as 15 Monocerotis, is a massive variable star system located in the constellation Monoceros. It is a spectroscopic binary system with an orbital period of 74 years. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. It is a type O main sequence dwarf varying in between magnitude 4.2 and 4.6. The star lies at the base of the Christmas Tree Cluster in NGC 2264.Physical data for the system is disputed. The Washington Double Star catalog reports it as having 8 components. From orbital parameters and association with NGC 2264 it is given a distance of 720pc, but the Hipparcos parallax suggests less than half that.".