11 Canis Majoris

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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  mas [1]
Distance 1,010 ± 60  ly
(310 ± 20  pc)
Absolute magnitude  (MV)−1.63 [2]
Details
Mass 3.9 [5]   M☉
Radius 8.8 [6]   R☉
Luminosity 465 [5]   L☉
Surface gravity (log g)3.85 [7]   cgs
Temperature 13,274 [7]   K
Metallicity [Fe/H]+0.39 [7]   dex
Rotational velocity (v sin i)130 [8]  km/s
Other designations
11 CMa, BD−14°1584, GC 8879, HD 49229, HIP 32492, HR 2504, SAO 151919 [9]
Database references
SIMBAD data

11 Canis Majoris is a single [10] 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]

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. [8] The star is radiating 465 times the luminosity of the Sun [5] from its photosphere at an effective temperature of 13,274  K . [7]

References

  1. 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 . Gaia DR2 record for this source at VizieR.
  2. 1 2 3 4 5 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. 1 2 Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, vol. 4, Bibcode:1988mcts.book.....H.
  4. 1 2 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, S2CID   119231169.
  5. 1 2 3 Quintana, Alexis L.; Wright, Nicholas J.; Martínez García, Juan (2025). "A census of OB stars within 1 KPC and the star formation and core collapse supernova rates of the Milky Way". Monthly Notices of the Royal Astronomical Society. 538 (3): 1367. arXiv: 2503.08286 . Bibcode:2025MNRAS.538.1367Q. doi: 10.1093/mnras/staf083 .
  6. ↑ Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel; Jenkins, Jon M.; Stassun, Keivan; Twicken, Joseph D.; Vanderspek, Roland; Winn, Joshua N. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series. 268 (1): 4. arXiv: 2208.11721 . Bibcode:2023ApJS..268....4F. doi: 10.3847/1538-4365/acdee5 .
  7. 1 2 3 4 Huson, Dylan; Cowan, Indiana; Sizemore, Logan; Kounkel, Marina; Hutchinson, Brian (2025). "Gaia Net: Toward Robust Spectroscopic Parameters of Stars of all Evolutionary Stages". The Astrophysical Journal. 984 (1): 58. arXiv: 2503.02958 . Bibcode:2025ApJ...984...58H. doi: 10.3847/1538-4357/adc2fa .
  8. 1 2 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, S2CID   119436374.
  9. ↑ "42 Cnc". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-07-08.
  10. ↑ 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 , S2CID   14878976.
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