Astronomy:Markarian 50

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Short description: Open cluster in the constellation Virgo
Markarian 50
Markarian50.png
Observation data (J2000 epoch)
ConstellationCassiopeia
Right ascension 23h 15m 15.1s[1]
Declination+60° 26′ 02″[1]
Distance3,460 pc
Physical characteristics
Estimated age7.5 million years
Other designationsCl Basel 3, Cl Mrk 50, OCISM 56, MWSC 3712, C 2313+602, Cl Biurakan 3, OCl 257
See also: Open cluster, List of open clusters

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]

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. 1.0 1.1 "Cl Mrk 50". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Cl+Mrk+50. 
  2. 2.0 2.1 Baume, Gustavo; Vázquez, Rubén A.; Carraro, Giovanni (December 2004). "The young open cluster Markarian 50" (in en). Monthly Notices of the Royal Astronomical Society 355 (2): 475–484. doi:10.1111/j.1365-2966.2004.08337.x. ISSN 0035-8711. Bibcode2004MNRAS.355..475B. 
  3. 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. doi:10.1086/113410. ISSN 0004-6256. Bibcode1983AJ.....88.1199T. http://adsabs.harvard.edu/cgi-bin/bib_query?1983AJ.....88.1199T. 

Coordinates: Sky map 23h 15m 15.1s, +60° 26′ 02″