V394 Aurigae
Star in the constellation Auriga
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V394 Aurigae is a semi-regular variable star in the constellation Auriga. Its brightness varies between magnitudes 6.01 and 6.11,[2] so it is faintly visible to the naked eye under ideal observing conditions. Located around 880 light-years distant, V394 Aurigae shines with a luminosity approximately 985 times that of the Sun[1][6] and has a surface temperature of 3,639 K.[5]
 | |
| Observation data Epoch J2000[1] Equinox ICRS | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 06m 22.44529s[1] |
| Declination | +29° 30′ 44.6832″[1] |
| Apparent magnitude (V) | 6.01 - 6.11[2] |
| Characteristics | |
| Evolutionary stage | AGB[3] |
| Spectral type | M3II[4] |
| Apparent magnitude (G) | 5.02[1] |
| U−B color index | 1.94 |
| B−V color index | 1.73 |
| Variable type | Semi-regular[2] |
| Astrometry | |
| Radial velocity (Rv) | −36.99±0.19[1] km/s |
| Proper motion (μ) | RA: 11.503±0.083[1] mas/yr Dec.: −5.126±0.059[1] mas/yr |
| Parallax (π) | 3.7146±0.0756 mas[1] |
| Distance | 880 ± 20 ly (269 ± 5 pc) |
| Details | |
| Radius | 85[5] R☉ |
| Luminosity | 985[6] L☉ |
| Surface gravity (log g) | 0.78[7] cgs |
| Temperature | 3,639[5] K |
| Other designations | |
| DO 11899, HIC 28930, PPM Star Catalogue 95388, STT 129, GC 7725, HIP 28930, SAO 77958, ADS 4673, GCRV 3829, HR 2146, AG+29° 663, IDS 06000+2931, TYC 1876-1774-1, BD+29° 1112, IRAS 06031+2931, UBV M 11751, CCDM J06064+2931, GSC 01876-01774, IRC +30137, YZ 29 2943, CSI+29 1112 1, HD 41429, 2MASS J06062243+2930445, Gaia DR3 3437486803458219904. | |
| Database references | |
| SIMBAD | data |
In 1991, Leroy F. Snyder discovered that the star, then called HR 2146, is a variable star.[9] It was given its variable star designation, V394 Aurigae, in 1993.[10] Koen and Eyer found that the star's brightness, as seen by Hipparcos, varies with a period of 3.9 days.[11]
It is a double star: the secondary, designated V394 Aurigae B, is an eleventh-magnitude F7V star[12] with a separation of 10 arcseconds.[13]