Gliese 268

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Gliese 268
Gliese268LightCurve.png
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
Epoch J2000       Equinox J2000
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  mas [3]
Distance 19.741 ± 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
Mass 0.22599±0.00065 [8]   M☉
Radius 0.242 [10]   R☉
Luminosity 0.00572 [10]   L☉
Temperature 3,192 [9]   K
Metallicity [Fe/H]0.056 [9]   dex
Gliese 268 B
Mass 0.19248±0.00056 [8]   M☉
Radius 0.218 [10]   R☉
Luminosity0.00427 [10]   L☉
Temperature 3,192 [9]   K
Metallicity [Fe/H]0.056 [9]   dex
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
SIMBAD data
ARICNS data
Celestial map Aur.svg
Red pog.png
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 2 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. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  3. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. 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. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  6. 1 2 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. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085.
  8. 1 2 3 4 Barry, Richard K.; Demory, Brice-Olivier; Ségransan, Damien; Forveille, Thierry; Danchi, William C.; Di Folco, Emmanuel; Queloz, Didier; Spooner, H. R.; Torres, Guillermo; Traub, Wesley A.; Delfosse, Xavier; Mayor, Michel; Perrier, Christian; Udry, Stéphane (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 . S2CID   1623628.
  9. 1 2 3 4 5 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. arXiv: 1604.07920 . Bibcode:2016ApJ...822...97H. doi: 10.3847/0004-637X/822/2/97 .
  10. 1 2 3 4 5 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. arXiv: 2302.04242 . Bibcode:2023AJ....165..265M. doi: 10.3847/1538-3881/acd175 .
  11. ↑ "V* QY Aur". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 7 March 2015.
  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" (PDF). Information Bulletin on Variable Stars. 1248: 1–25. Bibcode:1977IBVS.1248....1K . Retrieved 30 November 2024.
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