Cygnus OB9
Appearance
Cygnus OB9 | |
---|---|
Observation data (J2000.0epoch) | |
Right ascension | 20h21m00.0s[1] |
Declination | 39° 54′ 00″ |
Distance | 5000ly |
Apparent magnitude(V) | 7.7 |
Physical characteristics | |
Associations | |
Constellation | Cygnus |
Cygnus OB9is anOB associationinCygnus.[2]It is near to theCygnus OB2association. The region is embedded within a wider one of star formation known asCygnus X,which is one of the most luminous objects in the sky at radio wavelengths. The region is approximately 5000 light years from Earth in theconstellation of Cygnus.[3]
Although Cygnus OB9 has many O and B type stars, Cygnus OB9 is also hidden behind a massive dust cloud known as theCygnus RiftlikeCygnus OB2.
Star name | Spectral type | Luminosity(L☉) | Temperature(K) | Mass(M☉) |
---|---|---|---|---|
V2245 Cygni (HD 229196) | O5 | 255900 | 40862 | 61.6 |
ALS 11244 | O5If | 125900 | 38612 | 40.1 |
BD+39 4177 | O6.5 | 136800 | 37870 | 39.3 |
HD 229250 | O7 | 110700 | 36872 | 33.9 |
BD+39 4168 | O7 | 123600 | 36872 | 37.3 |
HD 229202 | O8V | 62500 | 34877 | 25 |
See also
[edit]References
[edit]- ^"Ass Cyg OB 9".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2021-01-02.
- ^Pickett, Daniel Edward (1993). "Photoelectric UBV photometry of Cygnus OB3 and Cygnus OB9".ProQuest Dissertations and Theses; Thesis (M.S.)--University of Montana.52–03: 39.Bibcode:1993PhDT.......160P.
- ^Zakirov, M. M.; Eshankulova, M. U. (2008). "Close binary systems in regions of OB associations. VI. V498 Cyg in Cyg OB9".Kinematics and Physics of Celestial Bodies.24(2): 77–88.Bibcode:2008KPCB...24...77Z.doi:10.3103/S0884591308020037.S2CID121799853.
- ^Comerón, F.; Pasquali, A. (2012)."New members of the massive stellar population in Cygnus".Astronomy & Astrophysics.110:2715.Bibcode:2012A&A...543A.101C.doi:10.1051/0004-6361/201219022.