Lambda Canis Majoris

Lambda Canis Majoris
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Canis Major
Right ascension 06h 28m 10.20747s[1]
Declination −32° 34′ 48.2455″[1]
Apparent magnitude (V) +4.48[2]
Characteristics
Spectral type B4 V[3]
U−B color index −0.61[2]
B−V color index −0.17[2]
Astrometry
Radial velocity (Rv)+41.0±4.1[4] km/s
Proper motion (μ) RA: −14.41[1] mas/yr
Dec.: +25.21[1] mas/yr
Parallax (π)7.70 ± 0.16 mas[1]
Distance424 ± 9 ly
(130 ± 3 pc)
Absolute magnitude (MV)−0.85[5]
Details
Mass5.7±0.3[6] M☉
Luminosity560[7] L☉
Surface gravity (log g)3.93[8] cgs
Temperature16,300[3] K
Rotational velocity (v sin i)102±9[3] km/s
Age39.8±19.1[6] Myr
Other designations
λ CMa, CD−32°3066, GC 8410, HD 45813, HIP 30788, HR 2361, SAO 196857[9]
Database references
SIMBADdata

Lambda Canis Majoris (λ Canis Majoris) is a solitary,[10] blue-white hued star in the constellation Canis Major. Lambda CMa is visible to the naked eye with an apparent visual magnitude of +4.48.[2] Based upon an annual parallax shift of 7.70 mas as seen from Earth,[1] this star is located about 424 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.14 due to interstellar dust.[5]

This is a B-type main-sequence star with a stellar classification of B4 V.[3] The star is roughly 40 million years old,[6] and is spinning with a projected rotational velocity of 102 km/s.[3] It has about 5.7[6] times the mass of the Sun and is radiating 560[7] times the Sun's luminosity at an effective temperature of 16,300 K.[3]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Braganca2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Castelli1991 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).