V538 Aurigae
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 41m 20.3357s |
| Declination | +53° 28′ 51.808″ |
| Apparent magnitude (V) | 6.23 |
| Characteristics | |
| Spectral type | K1 V |
| U−B color index | 0.51 |
| B−V color index | 0.84 |
| R−I color index | 0.29 |
| Variable type | BY Draconis variable |
| Astrometry | |
| Radial velocity (Rv) | 1.7 km/s |
| Proper motion (μ) | RA: 2.7 mas/yr Dec.: -523.61 mas/yr |
| Parallax (π) | 81.69 ± 0.83 mas |
| Distance | 39.9 ± 0.4 ly (12.2 ± 0.1 pc) |
| Absolute magnitude (MV) | 7.07 |
| Details | |
| Metallicity [Fe/H] | +0.16[1] dex |
| Rotation | 11 days[1] |
| Age | 4–8 × 108[2] years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
V538 Aurigae is a star in the northern constellation of Auriga. With an apparent visual magnitude of 6.23, this star requires good dark sky conditions to view with the naked eye. It is located at a distance of 39.9 light-years (12.2 parsecs) from Earth.
This is a BY Draconis variable, which means it undergoes changes in luminosity because regions of pronounced surface magnetic activity are moved into and out of the line of sight from the Earth as the star rotates (once every 11 days).[1] It has a spectral class of K1 V, indicating that it is a K-type main sequence star.
References
- ↑ 1.0 1.1 1.2 Maldonado, J. et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948
- ↑ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", The Astrophysical Journal 687 (2): 1264–1293, arXiv:0807.1686, Bibcode:2008ApJ...687.1264M, doi:10.1086/591785
External links
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