HD 93905

HD 93905
Location of HD 93905 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 49m 57.0188s[1]
Declination −34° 03′ 29.4506″[1]
Apparent magnitude (V) 5.61[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A1 V[4]
U−B color index +0.05[5]
B−V color index +0.04[5]
Astrometry
Radial velocity (Rv)−9.5±1.3[6] km/s
Proper motion (μ) RA: −41.069[1] mas/yr
Dec.: +5.845[1] mas/yr
Parallax (π)8.7989 ± 0.1617 mas[1]
Distance371 ± 7 ly
(114 ± 2 pc)
Absolute magnitude (MV)0.00[2]
Details[3]
Mass2.78±0.05 M☉
Radius3.89[7] R☉
Luminosity101±9 L☉
Surface gravity (log g)3.77[8] cgs
Temperature8995+125
−123 K
Rotational velocity (v sin i)85[9] km/s
Age256±6 Myr
Other designations
80 G. Antliae, CD−33° 7288, CPD−33° 2973, HD 93905, HIP 52965, HR 4238, SAO 201805
Database references
SIMBADdata

HD 93905 (HR 4238) is a solitary star located in the southern constellation Antlia. The star has an absolute magnitude of 0[2] and an apparent magnitude of 5.61,[2] making it faintly visible to the naked eye under ideal conditions. The star is located 371 light years[1] away based on its parallax shift and is drifting closer with a helocentric radial velocity of −9.6 km/s.[6]

This star has a classification of A1 V,[4] which indicates that it is an ordinary A-type main-sequence star that is fusing hydrogen at its core. At present it has 2.78[3] times the mass of the Sun but is large and over luminous for its class with 3.89[7] times and 101[3] times the radius and luminosity of the Sun respectively. This is because HD 93905 has already completed most of its main sequence lifetime at an age of 256 million years.[3] HD 93905 has a surface temperature of 8,895 K[3] and spins quickly with a projected rotational velocity of 85 km/s.[9]

  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 Cite error: The named reference Anderson2012 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 Houk1982 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. ^ a b Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Anders2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Royer2007 was invoked but never defined (see the help page).