EO Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 18m 21.0672s |
| Declination | +36° 37′ 55.362″ |
| Apparent magnitude (V) | 7.71 |
| Characteristics | |
| Spectral type | B3V + B3V |
| Apparent magnitude (G) | 7.69 |
| U−B color index | −0.63 |
| B−V color index | 0.08 |
| Variable type | Algol variable |
| Astrometry | |
| Radial velocity (Rv) | -1.1 km/s |
| Proper motion (μ) | RA: −0.479±0.034 mas/yr Dec.: −2.954±0.026 mas/yr |
| Parallax (π) | 0.9420±0.0306 mas |
| Distance | 3,500 ± 100 ly (1,060 ± 30 pc) |
| Details | |
| EO Aur A | |
| Mass | 6.22±0.73 M☉ |
| Luminosity (bolometric) | 2,784 L☉ |
| Temperature | 13,360 K |
| Age | 23.6±8.0 Myr |
| EO Aur B | |
| Mass | 5.00±2.57 M☉ |
| Luminosity (bolometric) | 1,377 L☉ |
| Temperature | 11,650 K |
| Other designations | |
| BD+36° 1073, HD 34333, HIP 24744, SAO 57857, Gaia DR3 187043317482036224. | |
| Database references | |
| SIMBAD | data |
EO Aurigae is an eclipsing binary of Algol type in the northern constellation of Auriga. With a combined apparent magnitude of 7.71, 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. 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.