36 Aurigae
Star in the constellation Auriga
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36 Aurigae is a single[11] variable star located about 1030[3] light years away from the Sun in the constellation Auriga. It has the variable star designation V444 Aurigae, while 36 Aurigae is the Flamsteed designation.[10] This object is visible to the naked eye as a dim, white-hued star with a baseline apparent visual magnitude of 5.71. It is moving further from the Earth with a heliocentric radial velocity of +16 km/s.[2]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Auriga[2] |
| Right ascension | 06h 00m 58.56217s[3] |
| Declination | +47° 54′ 06.9295″[3] |
| Apparent magnitude (V) | 5.71[2] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A1 Vp Si[5] or B9.5p Si,Fe[1] |
| Apparent magnitude (G) | 5.68[3] |
| B−V color index | −0.007±0.004[2] |
| Variable type | α2 CVn[6] |
| Astrometry | |
| Radial velocity (Rv) | +15.8±2.1[2] km/s |
| Proper motion (μ) | RA: +4.261±0.080[3] mas/yr Dec.: −21.088±0.066[3] mas/yr |
| Parallax (π) | 3.1546±0.0822 mas[3] |
| Distance | 1,030 ± 30 ly (317 ± 8 pc) |
| Absolute magnitude (MV) | −1.97[2] |
| Details | |
| Mass | 4.42±0.43[7] M☉ |
| Radius | 7.1[8] R☉ |
| Luminosity | 724+348 −234[7] L☉ |
| Surface gravity (log g) | 4.08[4] cgs |
| Temperature | 10,046+522 −496[7] K |
| Rotational velocity (v sin i) | 20[9] km/s |
| Age | 302[4] Myr |
| Other designations | |
| 36 Aur, V444 Aurigae, BD+47°1227, HD 40394, HIP 28499, HR 2101, SAO 40778, 2MASS J06005856+4754069[10] | |
| Database references | |
| SIMBAD | data |
36 Aurigae was discovered to be a variable star when the Hipparcos data was analyzed. Because of that, it was given its variable star designation in 1999.[12]
This is a magnetic chemically peculiar star that has been given stellar classifications of A1 Vp Si[5] and B9.5p Si,Fe,[1] indicating it is a late B- or early A-type star showing peculiarities of silicon and iron in the spectrum. It is an Alpha2 Canum Venaticorum variable that ranges in visual magnitude from 5.70 down to 5.74 with a period of 14.368 days.[6] The star has 4.4[7] times the mass of the Sun and is radiating 724 times the Sun's luminosity from its photosphere at an effective temperature of 10,046 K.[7]