HD 73634

HD 73634
Observation data
Epoch J2000.0 (ICRS)      Equinox J2000.0 (ICRS)
Constellation Vela
Right ascension 08h 37m 38.63278s[1]
Declination −42° 59′ 20.6894″[1]
Apparent magnitude (V) +4.11[2]
Characteristics
Spectral type A7Ia[3] or A6II[4]
B−V color index 0.109±0.011[2]
Astrometry
Radial velocity (Rv)+19.3±0.6[2] km/s
Proper motion (μ) RA: −10.75±0.13[1] mas/yr
Dec.: +9.66±0.12[1] mas/yr
Parallax (π)1.79 ± 0.15 mas[1]
Distance1,800 ± 200 ly
(560 ± 50 pc)
Absolute magnitude (MV)−4.61[2]
Details
Mass7.8±0.2[5] M☉
Radius33.69+2.42
−3.24[6] R☉
Luminosity4,140.2±594.5[6] L☉
Temperature7,977+415
−271[6] K
Age39.8±4.9[5] Myr
Other designations
e Vel, CD−42°4451, FK5 324, GC 11852, HD 73634, HIP 42312, HR 3426, SAO 220204[7]
Database references
SIMBADdata

HD 73634 is a single[8] star in the southern constellation of Vela. It has the Bayer designation e Velorum; HD 73634 is the star's designation from the Henry Draper Catalogue. The star is white in hue and is faintly visible to the naked eye, having an apparent visual magnitude of +4.11.[2] Parallax measurements provide a distance estimate of approximately 1,800 light years from the Sun. It is drifting further away with a radial velocity of +19 km/s.[2]

This evolved object has received stellar classifications of A7Ia[3] and A6II,[4] indicating that it is a massive supergiant or bright giant star. It has 7.8 times the mass of the Sun and is around 40 million years old.[5] The star has expanded to nearly 34 times the girth of the Sun and is radiating around 4,140 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 7,977 K.[6]

  1. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Stephenson1971 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Gray1989 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).