Markarian 50 is an open cluster in the Milky Way galaxy. It is about 3,460 pc away in the constellation Cassiopeia.[2] Markarian 50 is a very young open cluster, only about 7.5 million years old. Markarian 50 may be a member of the OB association Cassiopeia OB2.[2] The Wolf-Rayet star WR 157 is a member of Markarian 50.[3]
Prominent stars[4]
Star name
Effective temperature
Absolute magnitude
Bolometric magnitude
Mass (M☉)
Spectral type
HD 219460 A
30200
-4.7
-7.7
21
B0III
WR 157 (Companion to HD 219460 A)
65000
20
WN4.5
Mrk50-31
28200
-4.6
-7.4
19
B0.5I
Mrk50-23
23600
-4.5
-6.7
14
B1III
Mrk50-30A
22400
-3.6
-5.7
11
B1.5V
Mrk50-1
22400
-2.8
-4.8
9
B1.5V
^ ab"Cl Mrk 50". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 December 2020.
^ abBaume, Gustavo; Vázquez, Rubén A.; Carraro, Giovanni (December 2004). "The young open cluster Markarian 50". Monthly Notices of the Royal Astronomical Society. 355 (2): 475–484. Bibcode:2004MNRAS.355..475B. doi:10.1111/j.1365-2966.2004.08337.x. hdl:11336/38930. ISSN 0035-8711. S2CID 122774454.
^Turner, D. G.; Moffat, A. F. J.; Lamontagne, R.; Maitzen, H. M. (August 1983). "The WN4.5 component of HD 219460 in the open cluster Markarian 50". The Astronomical Journal. 88: 1199–1209. Bibcode:1983AJ.....88.1199T. doi:10.1086/113410. ISSN 0004-6256. S2CID 120580751.
^Massey, P.; Degioia-Eastwood, K.; Waterhouse, E. (2001). "The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations". The Astronomical Journal. 121 (2): 1050–1070. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769. S2CID 53345173.
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