Markarian 50

Markarian 50
Observation data (J2000 epoch)
Right ascension	23h 15m 13.4s [1]
Declination	+60° 26′ 53″ [1]
Distance	3,460 pc
Physical characteristics
Estimated age	7.5 million years
Other designations	Cl Basel 3, Cl Mrk 50, OCISM 56, MWSC 3712, C 2313+602, Cl Biurakan 3, OCl 257
Associations
Constellation	Cepheus [2]
See also: Open cluster, List of open clusters

Markarian 50 is a young open cluster in the Milky Way galaxy. Located at about 3,460 pc away in the constellation Cepheus, ^[2] its age is estimated at only about 7.5 million years old. Markarian 50 may be a member of the OB association Cassiopeia OB2. ^[3] The Wolf-Rayet star WR 157 is a member of Markarian 50. ^[4]

Markarian 50 can also refer to a Seyfert galaxy in the constellation Virgo. ^{[5] [2]}

Prominent stars ^[6]

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

References

1. "Cl Mrk 50". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 23 April 2025.
2. "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008.
3. Baume, 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.
4. 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.
5. "Mrk 50". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 23 April 2025.
6. 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.