EO Aurigae

EO Aurigae

The visual band light curve of EO Aurigae, adapted from Hartigan (1981)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 18m 21.06592s[2]
Declination +36° 37′ 55.3517″[2]
Apparent magnitude (V) 7.71[3]
Characteristics
Spectral type B3V + B3V[4]
U−B color index −0.63[3]
B−V color index 0.08[3]
Variable type Algol variable
Astrometry
Radial velocity (Rv)-1.1[5] km/s
Proper motion (μ) RA: −1.67±1.71[2] mas/yr
Dec.: −3.33±0.75[2] mas/yr
Parallax (π)2.12 ± 1.15 mas[2]
Distanceapprox. 1,500 ly
(approx. 500 pc)
Details
EO Aur A
Mass6.22±0.73[6] M☉
Luminosity (bolometric)2,784[6] L☉
Temperature13,360[6] K
Age23.6±8.0[4] Myr
EO Aur B
Mass5.00±2.57[6] M☉
Luminosity (bolometric)1377[6] L☉
Temperature11,650[6] K
Other designations
BD+36° 1073, HD 34333, HIP 24744, SAO 57857.
Database references
SIMBADdata

EO Aurigae is an eclipsing binary of Algol type in the northern constellation of Auriga. With a combined apparent magnitude of 7.71,[3] it is too faint to be seen with the unaided eye.

The eclipsing binary nature of the star was detected in 1943 by Sergei Gaposchkin at Harvard College Observatory.[7] It consists of a pair of B-type main sequence stars orbiting each other with a period of 4.0656 days. During the eclipse of the primary star, the combined magnitude drops by 0.57; the eclipse of the secondary component drops the magnitude by 0.33.[8]

  1. ^ Cite error: The named reference Hartigan was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference aass34_1 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference tetzlaff was invoked but never defined (see the help page).
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  6. ^ a b c d e f Cite error: The named reference an331_4_349 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Gaposchkin1943 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa446_2_785 was invoked but never defined (see the help page).