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17 Canis Majoris

17 Canis Majoris
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
Distance610 ± 10 ly
(188 ± 3 pc)
Absolute magnitude (MV)−0.14[2]
Details
Mass2.84±0.05[3] M☉
Luminosity126+18
−15[3] L☉
Temperature8,872+164
−162[3] K
Rotational velocity (v sin i)43[3] km/s
Other designations
17 CMa, BD−20°1624, GC 9078, HD 51055, HIP 33248, HR 2588, SAO 172569, ADS 5585, CCDM 06550-2025, WDS J06550-2024[5]
Database references
SIMBADdata

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]

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

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ "17 CMa". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 30, 2019.
  6. ^ 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.
  7. ^ 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.
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