15 Canis Majoris
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 06h 53m 32.907s[1] |
| Declination | −20° 13′ 27.32″[1] |
| Apparent magnitude (V) | +4.82 |
| Characteristics | |
| Spectral type | B1 Ib[2] |
| Variable type | β Cep[2] |
| Astrometry | |
| Proper motion (μ) | RA: -5.46 ± 0.16[1] mas/yr Dec.: 3.58 ± 0.17[1] mas/yr |
| Parallax (π) | 2.68 ± 0.24[1] mas |
| Distance | 1,200 ± 100 ly (370 ± 30 pc) |
| Details | |
| Mass | 12.8 ± 1.2[2] M☉ |
| Radius | 6.8 ± 1.2[2] R☉ |
| Luminosity | 20,000[2] L☉ |
| Surface gravity (log g) | 3.89 ± 0.20[2] cgs |
| Temperature | 26,100 ± 1,200[2] K |
| Rotational velocity (v sin i) | 20 ± 12[2] km/s |
| Other designations | |
15 Canis Majoris is a star in the constellation Canis Major.
15 Canis Majoris is a blue-white B-type subgiant with a mean apparent magnitude of +4.82. It is approximately 1200 light years from Earth.[1] It is classified as a Beta Cephei type variable star and its brightness varies from magnitude +4.79 to +4.84 with a period of 4.43 hours.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Hubrig, S. et al. (January 2009), "New magnetic field measurements of beta Cephei stars and Slowly Pulsating B stars", Astronomische Nachrichten 330 (4): 317, arXiv:0902.1314, Bibcode:2009AN....330..317H, doi:10.1002/asna.200811187
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