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HD 64484

HD 64484
Observation data
Epoch J2000      Equinox J2000
Constellation Volans
Right ascension 07h 49m 40.9911s[1]
Declination −66° 11′ 45.5045″[1]
Apparent magnitude (V) 5.76±0.01[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9 V[4]
U−B color index −0.16[5]
B−V color index −0.04[5]
Astrometry
Radial velocity (Rv)11±4.3[6] km/s
Proper motion (μ) RA: −2.037 mas/yr[1]
Dec.: −0.411 mas/yr[1]
Parallax (π)7.1191 ± 0.0628 mas[1]
Distance458 ± 4 ly
(140 ± 1 pc)
Absolute magnitude (MV)−0.11[7]
Details
Mass2.80±0.13[8] M☉
Radius3.3±0.3[8] R☉
Luminosity140±8[3] L☉
Surface gravity (log g)3.86±0.06[9] cgs
Temperature10,544±48[3] K
Metallicity [Fe/H]0.00[10] dex
Rotational velocity (v sin i)154[11] km/s
Age339+50
−44[8] Myr
Other designations
19 G. Volantis, CPD−65°827, FK5 2610, GC 10628, HD 64484, HIP 38210, HR 3081, SAO 249978
Database references
SIMBADdata

HD 64484 (HR 3081) is a solitary[12] star in the southern circumpolar constellation Volans. With an apparent magnitude of 5.76,[2] it is faintly visible to the naked eye under dark skies. Parallax measurements place it at a distance of 458 light years[1] but is receding with a heliocentric radial velocity of 11 km/s.[6]

HD 64484 has a stellar classification of B9 V,[4] indicating that it is an ordinary B-type main-sequence star. It has 2.8 times the mass of the Sun[8] and an effective temperature of 10,544 K,[3] giving it a bluish white hue. However, a slightly enlarged radius of 3.3 R☉[8] yields a luminosity 140 times that of the Sun.[3] This is due to HD 64484 completing 80.6% of its main sequence[3] lifetime at an age of 339 million years.[8] The star has a solar metallicity[10] and like many hot stars — spins rapidly with a projected rotational velocity of 154 km/s.[11]

  1. ^ a b c d e Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d e f Cite error: The named reference Bochanksi2018 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Levato2004 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggelton2008 was invoked but never defined (see the help page).
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