Markarian 50
Open cluster in the constellation Cepheus
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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 | |
|---|---|
| |
| Observation data (J2000 epoch) | |
| Right ascension | 23h 15m 13.4s[1] |
| Declination | +60° 26′ 53″[1] |
| Distance | 3,460 pc |
| Absolute magnitude (V) | 8.5 |
| 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] |
Markarian 50 can also refer to a Seyfert galaxy in the constellation Virgo.[5][2]
| 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 |
