15 Canis Majoris

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15 Canis Majoris
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 06h 53m 32.907s[1]
Declination −20° 13′ 27.32″[1]
Apparent magnitude (V) +4.82
Characteristics
Spectral type B1 Ib[2]
U−B color index -0.96[3]
B−V color index -0.21[3]
Variable type β Cep[2]
Astrometry
Radial velocity (Rv)28.00[4] km/s
Proper motion (μ) RA: -5.46 ± 0.16[1] mas/yr
Dec.: 3.58 ± 0.17[1] mas/yr
Parallax (π)2.68 ± 0.24[1] mas
Distance1,200 ± 100 ly
(370 ± 30 pc)
Details
Mass12.8 ± 1.2[2] M
Radius6.8 ± 1.2[2] R
Luminosity20,000[2] L
Surface gravity (log g)3.89 ± 0.20[2] cgs
Temperature26,100 ± 1,200[2] K
Rotational velocity (v sin i)20 ± 12[2] km/s
Other designations
EY Canis Majoris, HR 2571, HD 50707, BD−20°1616, FK5 2532, HIP 33092, SAO 172520, GC 9034.
Database references
SIMBADdata

15 Canis Majoris is a star in the constellation Canis Major.

15 Canis Majoris is a blue-white B-type subgiant with a mean apparent magnitude of +4.82. It is approximately 1200 light years from Earth.[1] It is classified as a Beta Cephei type variable star and its brightness varies from magnitude +4.79 to +4.84 with a period of 4.43 hours.

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Archived from the original on 2016-04-02.  Vizier catalog entry
  2. ^ a b c d e f g h Hubrig, S.; et al. (January 2009), "New magnetic field measurements of beta Cephei stars and Slowly Pulsating B stars", Astronomische Nachrichten, 330 (4): 317, arXiv:0902.1314Freely accessible, Bibcode:2009AN....330..317H, doi:10.1002/asna.200811187 
  3. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. 
  4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053Freely accessible. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.