EO Aurigae

Thevisual bandlight 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−Bcolor index	−0.63[3]
B−Vcolor 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]
Distance	approx. 1,500 ly (approx. 500 pc)
Details
EO Aur A
Mass	6.22±0.73[6] M☉
Luminosity (bolometric)	2,784[6] L☉
Temperature	13,360[6] K
Age	23.6±8.0[4] Myr
EO Aur B
Mass	5.00±2.57[6] M☉
Luminosity (bolometric)	1377[6] L☉
Temperature	11,650[6] K
Other designations
BD+36° 1073,HD 34333,HIP 24744,SAO 57857.
Database references
SIMBAD	data

EO Aurigae is aneclipsing binary ofAlgol type in the northernconstellation ofAuriga. With a combinedapparent 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 atHarvard College Observatory.^[7] It consists of a pair ofB-type main sequence stars orbiting each other with a period of 4.0656 days. During the eclipse of the primary star, the combinedmagnitude drops by 0.57; the eclipse of the secondary component drops the magnitude by 0.33.^[8]

• HIP 24744
• Image EO Aurigae

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