11 Canis Majoris

11 Canis Majoris is a single[7] star in the southern constellation of Canis Major, the eleventh entry in John Flamsteed's catalogue of stars in that constellation. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of 5.28.[2] The distance to this star is approximately 1,010 light years from the Sun based on parallax,[1] and it is drifting further away with a radial velocity of around +15 km/s.[4] It has an absolute magnitude of −1.63.[2]

11 Canis Majoris
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Major
Right ascension  06h 46m 51.09272s[1]
Declination −14° 25′ 33.5042″[1]
Apparent magnitude (V) 5.28[2]
Characteristics
Spectral type B8/9III[3]
B−V color index −0.024±0.004[2]
Astrometry
Radial velocity (Rv)+15.0±4.2[4] km/s
Proper motion (μ) RA: −2.853±0.344[1] mas/yr
Dec.: +8.514±0.363[1] mas/yr
Parallax (π)3.2263 ± 0.1847[1] mas
Distance1,010 ± 60 ly
(310 ± 20 pc)
Absolute magnitude (MV)−1.63[2]
Details
Luminosity485.12[2] L☉
Temperature11,540±181[5] K
Rotational velocity (v sin i)130[5] km/s
Other designations
11 CMa, BD−14°1584, GC 8879, HD 49229, HIP 32492, HR 2504, SAO 151919[6]
Database references
SIMBADdata

This star has a stellar classification of B8/9III,[3] matching a B-type star that is in the giant stage. It has a high rate of spin with a projected rotational velocity of 130 km/s.[5] The star is radiating 485[2] times the luminosity of the Sun from its photosphere at an effective temperature of 11,540 K.[5]

References
  1. 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. 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.
  3. Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, 4, Bibcode:1988mcts.book.....H.
  4. Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters, 32 (11): 759–771, arXiv:1606.08053, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.
  5. Paunzen, E.; et al. (December 2005), "An empirical temperature calibration for the ∆ a photometric system . I. The B-type stars", Astronomy and Astrophysics, 444 (3): 941–946, arXiv:astro-ph/0509049, Bibcode:2005A&A...444..941P, doi:10.1051/0004-6361:20053546.
  6. "42 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-08.
  7. Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
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