AW Canum Venaticorum
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Canes Venatici |
Right ascension | 13h 51m 47.47504s[1] |
Declination | +34° 26′ 39.2474″[1] |
Apparent magnitude (V) | 4.76[2] (4.73 – 4.85)[3] |
Characteristics | |
Spectral type | M3- IIIa[4] |
B−V color index | ±0.006 1.611[2] |
Variable type | Lb[3] |
Astrometry | |
Radial velocity (Rv) | ±0.25 −44.21[2] km/s |
Proper motion (μ) | RA: −20.477[1] mas/yr Dec.: −31.626[1] mas/yr |
Parallax (π) | 5.2734 ± 0.2529[1] mas |
Distance | 620 ± 30 ly (190 ± 9 pc) |
Absolute magnitude (MV) | −1.56[2] |
Details | |
Mass | ±0.16 2.18[5] M☉ |
Radius | +4.25 −4.57 117.41[5] R☉ |
Luminosity | ±213 2,387[5] L☉ |
Surface gravity (log g) | ±0.30 0.98[6] cgs |
Temperature | ±25 3,529[6] K |
Metallicity [Fe/H] | ±0.11 −0.09[6] dex |
Age | ±0.21 1.11[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
AW Canum Venaticorum is a variable star[3] in the constellation Canes Venatici. It is visible to the naked eye with a nominal apparent visual magnitude of 4.76.[2] The distance to this star, as measured from its annual parallax shift of mas, 5.3[1] is around 620 light years. It is moving closer with a heliocentric radial velocity of −44 km/s.[2]
At the age of 1.1 billion years,[5] this is an evolved red giant star with a stellar classification of M3- IIIa.[4] It is a slow irregular variable of type Lb, with a brightness that ranges between magnitudes 4.73 and 4.85.[3] The star has 2.2[5] times the mass of the Sun and has expanded to 117[5] times the Sun's radius. It is radiating 2,387[5] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,529 K.[6]
References
- 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
- 1 2 3 4 5 6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- 1 2 3 4 Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61: 80, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085.
- 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- 1 2 3 4 5 6 7 8 Baines, Ellyn K.; et al. (2018), "Fundamental Parameters of 87 Stars from the Navy Precision Optical Interferometer", The Astronomical Journal, 155, 30, arXiv:1712.08109, Bibcode:2018AJ....155...30B, doi:10.3847/1538-3881/aa9d8b.
- 1 2 3 4 Prugniel, P.; et al. (2011), "The atmospheric parameters and spectral interpolator for the MILES stars", Astronomy & Astrophysics, 531: A165, arXiv:1104.4952, Bibcode:2011A&A...531A.165P, doi:10.1051/0004-6361/201116769.
- ↑ "HD 120933". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 August 2018.