Gliese 268

Gliese 268
Observation data; Epoch J2000 Equinox J2000
Constellation	Auriga
Right ascension	07h 10m 01.83458s
Declination	38° 31′ 46.0672″
Characteristics
Spectral type	M5Ve + M5Ve
U−B color index	+1.18
B−V color index	+1.71
Variable type	RS CVn
Astrometry
Radial velocity (Rv)	41.792 ± 0.025 km/s
Proper motion (μ)	RA: -437.44 mas/yr ; Dec.: -947.44 mas/yr
Parallax (π)	158.88 ± 0.72 mas
Distance	20.53 ± 0.09 ly ; (6.29 ± 0.03 pc)
Orbit
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
Gliese 268 A
Mass	0.22599(65) M☉
Gliese 268 B
Mass	0.19248(56) M☉
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
Database references
SIMBAD	data
ARICNS	data

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.^{[citation needed]} Neither is visible to the naked eye from Earth.^[6]

References[]

^ Jump up to: ^a ^b ^c ^d Perryman; et al. (1997). "HIP 34603". The Hipparcos and Tycho Catalogues.
^ Jump up to: ^a ^b "V* QY Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 March 2015.
^ Jump up to: ^a ^b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
^ Jump up to: ^a ^b ^c ^d 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.

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[van_Leeuwen2007-1] Jump up to: ^a ^b ^c ^d Perryman; et al. (1997). "HIP 34603". The Hipparcos and Tycho Catalogues.

[SIMBAD-2] Jump up to: ^a ^b "V* QY Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 March 2015.

[EgUBV-3] Jump up to: ^a ^b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.

[Barry-4] Jump up to: ^a ^b ^c ^d 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.

[German-5] "RS CVn Stars". Karl Schwarzschild Observatory. Retrieved 26 August 2011.

[hundred-6] "The 100 Nearest Star Systems". Research Consortium on Nearby Stars. Georgia State University. 1 January 2011. Retrieved 26 August 2011.

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Observation data Epoch J2000 Equinox J2000
Constellation	Auriga
Right ascension	07^h 10^m 01.83458^s^[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 (R_v)	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
QY Aur, GJ 268, HIP 34603, G 87-26, G 07-51, LFT 512, LHS 226, LTT 11987, Ross 986, TYC 2944-1956-1^[2]
Database references
SIMBAD	data
ARICNS	data