Theta Canis Majoris

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θ Canis Majoris
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 06h 54m 11.4s
Declination −12° 02′ 19″
Apparent magnitude (V) +4.08
Distance 252 ± 17 ly
(77 ± 5 pc)
Spectral type K4III
Other designations
14 Canis Majoris, HR 2574, HD 50778, BD −11° 1681, FK5 266, HIP 33160, SAO 152071, GC 9051

Theta Canis Majoris (θ CMa, θ Canis Majoris) is a star in the constellation Canis Major.

θ Canis Majoris is an orange K-type giant with an apparent magnitude of +4.08 located approximately 252 light years from Earth. This star is about the same mass as the Sun, but it has 30 times the Sun's radius.and is thought to be around 8 billion years old.[1]


  1. ^ da Silva, L. et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics 458 (2): 609–623, arXiv:astro-ph/0608160, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105