HD 34790

HD 34790
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 21m 12.68806s[1]
Declination +29° 34′ 11.5926″[1]
Apparent magnitude (V) 5.66[2]
Characteristics
Spectral type A1Vs[3]
U−B color index +0.13[4]
B−V color index +0.06[4]
Astrometry
Radial velocity (Rv)−18.7±0.9[5] km/s
Proper motion (μ) RA: −0.40[1] mas/yr
Dec.: +0.91[1] mas/yr
Parallax (π)11.29 ± 0.32 mas
Distance289 ± 8 ly
(89 ± 3 pc)
Orbit[6]
Period (P)2.1517 d
Eccentricity (e)0.0
Periastron epoch (T)21140.396
Details
Luminosity35[7] L☉
Temperature8,682[7] K
Rotational velocity (v sin i)52[8] km/s
Other designations
BD+29° 869, HD 34790, HIP 25001, HR 1752, SAO 77124.
Database references
SIMBADdata

HD 34790 is a double-lined spectroscopic binary[9] star system in the northern constellation of Auriga. It has a combined apparent magnitude of 5.66,[2] which means it is faintly visible to the naked eye. Based upon observations by the Hipparcos satellite, it is located around 289 light years away.[1] It has a combined stellar classification of A1Vs,[3] matching that of an A-type main sequence star, and shines with 35 times the luminosity of the Sun.[7]

The two stars orbit each other with a period of only 2.15 days and an eccentricity of zero, indicating their orbit is close to circular.[6] They are orbiting sufficiently close to each other that their rotation periods have most likely become tidally locked—meaning they always maintain the same face toward each other.[9]

  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 Cite error: The named reference aaass89_2_415 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference aj74_375 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference atao7_209 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcrv1953 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference aa424_727 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference apj616_1_562 was invoked but never defined (see the help page).