EQ Virginis

EQ Virginis
Observation data; Epoch J2000 Equinox J2000
Constellation	Virgo
Right ascension	13h 34m 43.2063s[1]
Declination	−08° 20′ 31.3353″[1]
Apparent magnitude (V)	9.31
Characteristics
Spectral type	K5Ve
U−B color index	?
B−V color index	?
Variable type	Flare
Astrometry
Radial velocity (Rv)	−22.42 ± 0.14 km/s
Proper motion (μ)	RA: −286.577±0.110[1] mas/yr ; Dec.: −91.866±0.083[1] mas/yr
Parallax (π)	48.7322 ± 0.0587[1] mas
Distance	66.93 ± 0.08 ly ; (20.52 ± 0.02 pc)
Absolute magnitude (MV)	10.51
Details
Mass	? M☉
Radius	? R☉
Luminosity	? L☉
Temperature	4224 ± 80[2] K
Metallicity	−0.150
Rotation	?
Age	30-50 million years[3] years
Other designations
	EQ Vir, GJ 517, PLX 3101, BD−07° 3646, HD 118100, SAO 139419, 1E 1332.1-0804, HERZ 13903, RBS 1287, HIP 66252, LTT 5253, Ross 478.
Database references
SIMBAD	data
ARICNS	data

EQ Virginis is a flare star in the constellation of Virgo. It is an orange dwarf of spectral type K5Ve and is a member of the IC 2391 moving group.[4] The moving group of stars is between 30 and 50 million years old.[3]

References

Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.
Paulson, Diane B.; Yelda, Sylvana (2006). "Differential Radial Velocities and Stellar Parameters of Nearby Young Stars". Publications of the Astronomical Society of the Pacific. 118 (843): 706–715. arXiv:astro-ph/0605433. Bibcode:2006PASP..118..706P. doi:10.1086/504115. S2CID 16194615.
Montes, D.; López-Santiago, J.; Gálvez, M. C.; Fernández-Figueroa, M. J.; De Castro, E.; Cornide, M. (2001). "Late-type members of young stellar kinematic groups - I. Single stars" (PDF). Monthly Notices of the Royal Astronomical Society. 328 (1): 45–63. arXiv:astro-ph/0106537. Bibcode:2001MNRAS.328...45M. doi:10.1046/j.1365-8711.2001.04781.x. S2CID 55727428.

Simbad

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[Gaia_DR2-1] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Casagrande_2011-2] Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.

[Paulson_2006-3] Paulson, Diane B.; Yelda, Sylvana (2006). "Differential Radial Velocities and Stellar Parameters of Nearby Young Stars". Publications of the Astronomical Society of the Pacific. 118 (843): 706–715. arXiv:astro-ph/0605433. Bibcode:2006PASP..118..706P. doi:10.1086/504115. S2CID 16194615.

[montes_2001-4] Montes, D.; López-Santiago, J.; Gálvez, M. C.; Fernández-Figueroa, M. J.; De Castro, E.; Cornide, M. (2001). "Late-type members of young stellar kinematic groups - I. Single stars" (PDF). Monthly Notices of the Royal Astronomical Society. 328 (1): 45–63. arXiv:astro-ph/0106537. Bibcode:2001MNRAS.328...45M. doi:10.1046/j.1365-8711.2001.04781.x. S2CID 55727428.