Astronomy:Gliese 268

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Short description: Binary star system in the constellation Auriga

Coordinates: Sky map 07h 10m 01.83458s, +38° 31′ 46.0672″

Gliese 268
300px
A blue light light curve of a flare on Gliese 268. The intensity scale is relative to the star's quiescent brightness. Adapted from Pettersen (1975)[1]
Observation data
Equinox J2000.0]] (ICRS)
Constellation Auriga[2]
Right ascension  07h 10m 01.83358s[3]
Declination +38° 31′ 46.0865″[3]
Apparent magnitude (V) 11.52[4]
Characteristics
Spectral type M4.5Ve[5]
U−B color index +1.18[6]
B−V color index +1.71[6]
Variable type Flare star[7]
Astrometry
Radial velocity (Rv)+41.792±0.025[8] km/s
Proper motion (μ) RA: −439.420[3] mas/yr
Dec.: −944.793[3] mas/yr
Parallax (π)165.2147 ± 0.0636[3] mas
Distance19.741 ± 0.008 ly
(6.053 ± 0.002 pc)
Absolute magnitude (MV)+12.48[9]
Orbit[8]
Period (P)10.42672±0.00006 d
Semi-major axis (a)0.01110±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
Gliese 268 A
Mass0.22599±0.00065[8] M☉
Radius0.242[10] R☉
Luminosity0.00572[10] L☉
Temperature3,192[9] K
Metallicity [Fe/H]0.056[9] dex
Gliese 268 B
Mass0.19248±0.00056[8] M☉
Radius0.218[10] R☉
Luminosity0.00427[10] L☉
Temperature3,192[9] K
Other designations
QY Aur, GJ 268, HIP 34603, G 87-26, G 07-51, LFT 512, LHS 226, LTT 11987, Ross 986, TYC 2944-1956-1[11]
Database references
SIMBADdata
ARICNSdata
Gliese 268 is located in the constellation Auriga
Gliese 268 is located in the constellation Auriga
Gliese 268
Location of Gliese 268 in the constellation Auriga

Gliese 268 (QY Aurigae) is a binary star system in the constellation of Auriga, and is one of the one hundred closest star systems to the Earth.

Gliese 268 is composed of two M-type dwarfs, or red dwarfs. The primary component of the system is calculated to have an apparent magnitude of 11.95, and the secondary component an apparent magnitude of 12.45.[10]

In 1975, Bjørn Ragnvald Pettersen discovered that Gliese 268 is a flare star.[1] It received its variable star designation, QY Aurigae, in 1977.[12]

References

  1. ↑ 1.0 1.1 Pettersen, B. R. (June 1975). "Discovery of flare activity on the dM5e star Gliese 268". Astronomy & Astrophysics 41: 87–90. Bibcode: 1975A&A....41...87P. 
  2. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R  Constellation record for this object at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  4. ↑ Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". Vizier Online Data Catalog. Bibcode: 2012yCat.1322....0Z. 
  5. ↑ Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins Catalog of Revised MK Types for the Cooler Stars". The Astrophysical Journal Supplement Series 71: 245. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K. 
  6. ↑ 6.0 6.1 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode: 1986EgUBV........0M. 
  7. ↑ Samus', N. N.; Kazarovets, E. V.; Durlevich, O. V.; Kireeva, N. N.; Pastukhova, E. N. (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports 61 (1): 80. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S. 
  8. ↑ 8.0 8.1 8.2 8.3 Barry, Richard K.; Demory, Brice-Olivier; Ségransan, Damien; Forveille, Thierry; Danchi, William C.; Di Folco, Emmanuel; Queloz, Didier; Spooner, H. R. et al. (2012). "A Precise Physical Orbit for the M-Dwarf Binary Gliese 268". The Astrophysical Journal 760 (1): 55. doi:10.1088/0004-637X/760/1/55. Bibcode: 2012ApJ...760...55B. 
  9. ↑ 9.0 9.1 9.2 9.3 Houdebine, E. R.; Mullan, D. J.; Paletou, F.; Gebran, M. (2016). "Rotation-Activity Correlations in K and M Dwarfs. I. Stellar Parameters and Compilations of v sin I and P/Sin I for a Large Sample of Late-K and M Dwarfs". The Astrophysical Journal 822 (2): 97. doi:10.3847/0004-637X/822/2/97. Bibcode: 2016ApJ...822...97H. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 Ment, Kristo; Charbonneau, David (2023). "The Occurrence Rate of Terrestrial Planets Orbiting Nearby Mid-to-late M Dwarfs from TESS Sectors 1-42". The Astronomical Journal 165 (6): 265. doi:10.3847/1538-3881/acd175. Bibcode: 2023AJ....165..265M. 
  11. ↑ "V* QY Aur". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+QY+Aur. 
  12. ↑ Kukarkin, B. V.; Kholopov, P. N.; Fedorovich, V. P.; Kireyeva, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (March 1977). "62nd Name-List of Variable Stars". Information Bulletin on Variable Stars 1248: 1–25. Bibcode: 1977IBVS.1248....1K. https://ibvs.konkoly.hu/pub/ibvs/1201/1248.pdf. Retrieved 30 November 2024. 



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