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Delta Canis Majoris

"Wezen" redirects here. Not to be confused with Wazn, a star in Columba.
δ Canis Majoris
Location of δ Canis Majoris (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Major
Right ascension 07h 08m 23.48608s[1]
Declination −26° 23′ 35.5474″[1]
Apparent magnitude (V) 1.824[2]
Characteristics
Spectral type F8 Ia[3]
U−B color index +0.584[2]
B−V color index +0.67[4][5]
Variable type ?[6]
Astrometry
Radial velocity (Rv)34.3 ± 0.9[7] km/s
Proper motion (μ) RA: –3.12[1] mas/yr
Dec.: +3.31[1] mas/yr
Parallax (π)2.03 ± 0.38 mas[1]
Distanceapprox. 1,600 ly
(approx. 490 pc)
Absolute magnitude (MV)−6.77±0.41[8]
Details
Mass14–15[8] M☉
Radius188[9] R☉
Luminosity37,500[10] – 51,000[11] L☉
Surface gravity (log g)1.00±0.14[3] cgs
Temperature5818±53[12] K
Metallicity [Fe/H]0.28[4] dex
Rotational velocity (v sin i)13.4±1.9[5] km/s
Age12[3] Myr
Other designations
Wezen, Wesen, Wezea, Alwazn, Al Wazor, 25 Canis Majoris, CD−263916, FK5 273, HD 54605, HIP 34444, HR 2693, SAO 173047.
Database references
SIMBADdata

Delta Canis Majoris (Latinised from δ Canis Majoris, abbreviated Delta CMa, δ CMa), officially named Wezen /ˈwiːzən/,[13] is a star in the constellation of Canis Major. It is a yellow-white F-type supergiant with an apparent magnitude of +1.83. Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.[14]

  1. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference sps1966 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference mnras402_2_1369 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Luck2014 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference a-v e was invoked but never defined (see the help page).
  6. ^ Koen, Chris; Eyer, Laurent (2002). "New periodic variables from the Hipparcos epoch photometry". Monthly Notices of the Royal Astronomical Society. 331 (1): 45–59. arXiv:astro-ph/0112194. Bibcode:2002MNRAS.331...45K. doi:10.1046/j.1365-8711.2002.05150.x. ISSN 0035-8711. S2CID 10505995.
  7. ^ Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Neuhauser was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference tycho-gaia was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference hohle2010 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference rmaa39_3 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference PASA24_3_151 was invoked but never defined (see the help page).
  13. ^ "IAU Catalog of Star Names". Retrieved 28 July 2016.
  14. ^ Cite error: The named reference baas25_1319 was invoked but never defined (see the help page).

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