HD 32309

HD 32309
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension 05h 01m 25.58117s[1]
Declination −20° 03′ 06.9054″[1]
Apparent magnitude (V) 4.91[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9V[4]
B−V color index −0.047±0.002[2]
Astrometry
Radial velocity (Rv)+24.2±2.8[2] km/s
Proper motion (μ) RA: +36.377[1] mas/yr
Dec.: −15.600[1] mas/yr
Parallax (π)16.5337 ± 0.1691 mas[1]
Distance197 ± 2 ly
(60.5 ± 0.6 pc)
Absolute magnitude (MV)1.00[2]
Details
Mass2.56±0.02[3] or 3.24[5] M☉
Radius3.1[6] R☉
Luminosity46.5[2] L☉
Surface gravity (log g)4.27±0.14[5] cgs
Temperature12,450±423[5] K
Rotational velocity (v sin i)293[5] or 302[3] km/s
Age124[5] Myr
Other designations
BD−20°990, HD 32309, HIP 23362, HR 1621, SAO 169981[7]
Database references
SIMBADdata

HD 32309 is a single[8] star in the southern constellation of Lepus. It has a blue-white hue and is visible to the naked eye with an apparent visual magnitude of 4.91.[2] The distance to this object is 197 light years based on parallax.[1] It is drifting further away from the Sun with a radial velocity of +24 km/s.[2] This is a member of the Columba association of co-moving stars.[9]

This is a B-type main-sequence star with a stellar classification of B9V.[4] It is around 124[5] million years old and is spinning rapidly with a projected rotational velocity of about 300 km/s.[5][3] Mass estimates range from 2.56[3] to 3.24[5] times the mass of the Sun and it has about 3.1[6] times the Sun's radius. The star is radiating 46.5[2] times the luminosity of the Sun from its photosphere at an effective temperature of 12,450 K.[5]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h i Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference CADARS 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).
  9. ^ Cite error: The named reference Elliott2016 was invoked but never defined (see the help page).