Gliese 268
Gliese 268 (QY Aurigae) is a RS Canum Venaticorum variable (RS CVn) star in the Auriga constellation. RS CVn variables are binary star systems with a strong magnetic field influenced by each star's rotation, which is accelerated by the tidal effects of the other star in the system.[5] Gliese 268 in particular is composed of a binary system of two M-type dwarfs, or red dwarfs, and is one of the one hundred closest star systems to the Earth. The primary component of the system has an apparent magnitude of 12.05, and the secondary component an apparent magnitude of 12.45. Neither is visible to the naked eye from Earth.[6]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 07h 10m 01.83458s[1] |
| Declination | 38° 31′ 46.0672″[1] |
| Characteristics | |
| Spectral type | M5Ve + M5Ve[2] |
| U−B color index | +1.18[3] |
| B−V color index | +1.71[3] |
| Variable type | RS CVn |
| Astrometry | |
| Radial velocity (Rv) | 41.792 ± 0.025[4] km/s |
| Proper motion (μ) | RA: -437.44[1] mas/yr Dec.: -947.44[1] mas/yr |
| Parallax (π) | 158.88 ± 0.72[4] mas |
| Distance | 20.53 ± 0.09 ly (6.29 ± 0.03 pc) |
| Orbit[4] | |
| Period (P) | 10.42672 ± 0.00006 d |
| Semi-major axis (a) | 0.1110 ± 0.0005″ |
| Eccentricity (e) | 0.3203 ± 0.0009 |
| Inclination (i) | 100.39 ± 0.03° |
| Longitude of the node (Ω) | 89.98 ± 0.07° |
| Argument of periastron (ω) (secondary) | 211.98 ± 0.19° |
| Semi-amplitude (K1) (primary) | 34.814 ± 0.036 km/s |
| Semi-amplitude (K2) (secondary) | 40.874 ± 0.052 km/s |
| Details[4] | |
| Gliese 268 A | |
| Mass | 0.22599(65) M☉ |
| Gliese 268 B | |
| Mass | 0.19248(56) M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
References
- Perryman; et al. (1997). "HIP 34603". The Hipparcos and Tycho Catalogues.
- "V* QY Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 March 2015.
- Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
- Barry, R. K.; Demory, B.-O.; Ségransan, D.; Forveille, T.; Danchi, W. C.; Di Folco, E.; Queloz, D.; Spooner, H. R.; Torres, G.; Traub, W. A.; Delfosse, X.; Mayor, M.; Perrier, C.; Udry, S. (2012). "A Precise Physical Orbit for the M-Dwarf Binary Gliese 268". The Astrophysical Journal. 760 (1): 55. Bibcode:2012ApJ...760...55B. doi:10.1088/0004-637X/760/1/55. hdl:2060/20130013663.
- "RS CVn Stars". Karl Schwarzschild Observatory. Retrieved 26 August 2011.
- "The 100 Nearest Star Systems". Research Consortium on Nearby Stars. Georgia State University. 1 January 2011. Retrieved 26 August 2011.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.