17 Canis Majoris is a single[6] star in the southern constellation of Canis Major, located 610 light years away from the Sun.[1] It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.80.[2] The object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 55m 02.73805s[1] |
| Declination | −20° 24′ 17.5527″[1] |
| Apparent magnitude (V) | 5.80[2] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | A2 V[4] |
| B−V color index | 0.048±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | −12.9±0.5[2] km/s |
| Proper motion (μ) | RA: −0.284 mas/yr Dec.: +10.574 mas/yr |
| Parallax (π) | 5.3270 ± 0.0978 mas |
| Distance | 610 ± 10 ly (188 ± 3 pc) |
| Absolute magnitude (MV) | −0.14[2] |
| Details | |
| Mass | 2.84±0.05[3] M☉ |
| Luminosity | 126+18 −15[3] L☉ |
| Temperature | 8,872+164 −162[3] K |
| Rotational velocity (v sin i) | 43[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an A-type main-sequence star with a stellar classification of A2 V,[4] and is near the end of its main sequence lifetime. It has 2.8 times the mass of the Sun and is spinning with a projected rotational velocity of 43 km/s.[3] The star is radiating 126 times the luminosity of the Sun from its photosphere at an effective temperature of 8,872 K.[3] It has a magnitude 8.66 visual companion at an angular separation of 42.90″ along a position angle of 147°, as of 2015.[7]
References
edit- ^ a b c 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. Gaia DR2 record for this source at VizieR.
- ^ a b c d e f 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, S2CID 119257644.
- ^ a b c d e f g Zorec, J.; et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1988mcts.book.....H.
- ^ "17 CMa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 30, 2019.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22.