HD 34968

HD 34968
Observation data
Epoch J2000      Equinox J2000
Constellation Lepus
Right ascension 05h 20m 26.91498s[1]
Declination −21° 14′ 23.1367″[1]
Apparent magnitude (V) 4.69 (4.73 + 8.45)[2]
Characteristics
Spectral type A0 V[3]
B−V color index −0.048±0.003[4]
Astrometry
Radial velocity (Rv)30.9±0.5[5] km/s
Proper motion (μ) RA: +17.149[1] mas/yr
Dec.: −9.382[1] mas/yr
Parallax (π)8.7188 ± 0.1661 mas[1]
Distance374 ± 7 ly
(115 ± 2 pc)
Absolute magnitude (MV)−0.82[4]
Details
HD 34968 A
Mass3.34±0.06[6] M☉
Radius2.0[7] R☉
Luminosity245+38
−33[6] L☉
Temperature10,046+70
−69[6] K
Rotational velocity (v sin i)84[6] km/s
Other designations
BD−21° 1135, HD 34968, HIP 24927, HR 1762, SAO 170327, WDS J05204-2114A[8]
Database references
SIMBADdata

HD 34968 is a binary star[2] system in the southern constellation Lepus. The combined apparent visual magnitude of 4.69[2] is bright enough to be visible to the naked eye. The distance to HD 34968 can be estimated from its annual parallax shift of 8.7 mas, yielding a range of 374 light years. It is moving further away from the Earth with a heliocentric radial velocity of 31 km/s,[5] having come within 118.6 ly some 3,686,000 years ago.[4]

The primary member, component A, is a magnitude 4.73 star. Houk and Smith-Moore (1978) gave this object a stellar classification of A0 V,[3] indicating it is an ordinary A-type main-sequence star. Gray and Garrison (1987) classified it as B9.5 III and noted that the spectrum is slightly variable.[9] It is 99.2%±2.6% of the way through its main sequence lifetime,[6] with 3.34[6] times the mass of the Sun and 2.0[7] times the Sun's radius. The star is spinning with a projected rotational velocity of 84 km/s.[6] It is radiating 245[6] times the Sun's luminosity from its photosphere at an effective temperature of 10,046 [6]

The fainter secondary, component B, is a magnitude 8.45[2] star at an angular separation of 4.1″ along a position angle of 279°, as of 2008.[10]

  1. ^ a b c d e 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 Eggleton2008 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h i Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference cadars was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Gray1987 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).