Astronomy:11 Canis Majoris
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Short description: Star in the constellation Canis Major
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 |
| 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 | |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 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 Houk, N.; Smith-Moore, M. (1988), Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars, 4, Bibcode: 1988mcts.book.....H.
- ↑ 4.0 4.1 Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, doi:10.1134/S1063773706110065, Bibcode: 2006AstL...32..759G.
- ↑ 5.0 5.1 5.2 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. doi:10.1093/mnras/staf083. Bibcode: 2025MNRAS.538.1367Q.
- ↑ Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F.
- ↑ 7.0 7.1 7.2 7.3 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. doi:10.3847/1538-4357/adc2fa. Bibcode: 2025ApJ...984...58H.
- ↑ 8.0 8.1 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, doi:10.1051/0004-6361:20053546, Bibcode: 2005A&A...444..941P.
- ↑ "42 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=42+Cnc.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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