W Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 7h 08m 03s |
| Declination | −11° 55′ 24″ |
| Apparent magnitude (V) | 6.29-7.07v[1] |
| Characteristics | |
| Spectral type | C6,3(N)[1] |
| B−V color index | 2.55[2] |
| Variable type | semiregular variable[1] |
| Astrometry | |
| Radial velocity (Rv) | 19.6[3] km/s |
| Proper motion (μ) | RA: -6.22[4] mas/yr Dec.: 2.82[4] mas/yr |
| Parallax (π) | 0.39[3] mas |
| Distance | 1444-1450[5] ly (443-445[5] pc) |
| Absolute magnitude (MV) | -4.13[5] |
| Details | |
| Radius | 234[5] R☉ |
| Temperature | 2900[5] K |
| Metallicity [Fe/H] | 0.3[4] dex |
| Other designations | |
W Canis Majoris is a carbon star in the constellation Canis Major. A cool star, it has a surface temperature of around 2900 K and a radius 234 times that of the sun, with a bolometric magnitude of -4.13 and distance estimated at 443 or 445 parsecs (1444-1450) light-years based on bolometric magnitude or radius. [5] It varies between magnitudes 6.27 and 7.09 over a period of 160 days.[1]
See also
References
- 1 2 3 4 Otero, Sebastian Alberto (7 November 2011). "W Canis Majoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 12 March 2014.
- ↑ "HD 54361, a carbon bright giant star in Canis Major", Ashland Astronomy Studio, retrieved 2013-08-18
- 1 2 "V* W CMa", SIMBAD Astronomical Database(Centre de donées astronomiques de Strasbourg), retrieved 2013-08-12
- 1 2 3 "HIP 34413", Wolfram Alpha, retrieved 2013-08-12
- 1 2 3 4 5 6 van Belle, Gerard T.; Paladini, Claudia; Aringer, Bernhard; Hron, Josef; et al. (2013). "The PTI Carbon Star Angular Size Survey: Effective Temperatures and Non-sphericity" (PDF). The Astrophysical Journal 775 (1): article id. 45, 19 pp. arXiv:1307.6585. Bibcode:2013ApJ...775...45V. doi:10.1088/0004-637X/775/1/45.
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