<templatestyles src="Template:Sky/styles.css" />Coordinates: Sky map 07h 03.2m 00s, −08° 20′ 00″

Messier 50

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Messier 50 or M 50, also known as NGC 2323 or the Heart-shaped Cluster, is an open cluster of stars in the constellation Monoceros. It was recorded by G. D. Cassini before 1711 and independently discovered by Charles Messier in 1772Template:Efn while observing Biela's Comet. It is sometimes described as a 'heart-shaped' figure or a blunt arrowhead.[1]

M50 is about 2,900 light-years away from Earth[2] and is near to but narrowly not estimated to be gravitationally tied to the Canis Major (CMa) OB1 association.[3] It has a core radius of Script error: No such module "convert".[4] and spans Script error: No such module "convert"..[3] The cluster has 508 confirmed and 109 probable members – their combined mass is more than Script error: No such module "val"., the mean stellar density would thus be 1.3 stars per cubic parsec.[3] It is around 140 million years old,[5] with two high-mass white dwarfs[6] and two chemically peculiar stars.[7]

Traditionally considered to be a single star cluster, in 2025 it was found to consist of two separate sub-clusters (NGC 2323-a and NGC 2323-b), making it a binary cluster.[8]

Gallery

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See also

References and footnotes

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External links

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