Astronomy:17 Canis Majoris
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 55m 02.73800s[1] |
| Declination | −20° 24′ 17.5578″[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: −0.242[1] mas/yr Dec.: −10.241[1] mas/yr |
| Parallax (π) | 5.4157 ± 0.0438 mas |
| Distance | 602 ± 5 ly (185 ± 1 pc) |
| Absolute magnitude (MV) | −0.14[2] |
| Details | |
| Mass | 2.84±0.05[3] M☉ |
| Radius | 5.2[5] R☉ |
| Luminosity | 126+18 −15[3] L☉ |
| Surface gravity (log g) | 3.38[1] cgs |
| Temperature | 8,872+164 −162[3] K |
| Rotational velocity (v sin i) | 43[3] km/s |
| Age | 340[1] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
17 Canis Majoris is a single[7] star in the southern constellation of Canis Major, located 602 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]
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.[8]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Zorec, J. et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 4.0 4.1 Houk, Nancy; Smith-Moore, M. (1978), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, 4, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1988mcts.book.....H.
- ↑ Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ "17 CMa". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=17+CMa.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22.
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