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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h18m 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] |
| 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 | |
| Database references | |
| SIMBAD | data |
EO Aurigae is an eclipsing binaryofAlgol type in the northern constellationofAuriga. 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]
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