V830 Tauri

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V830 Tauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension  04h 33m 10.033s[1]
Declination +24° 33′ 43.38″[1]
Apparent magnitude (V) 12.08 - 12.37[2]
Evolutionary stage T Tau[3]
Spectral type M0-1[4]
Variable type BY Dra[2]
Distance427 ly
(131[3] pc)
Mass1.00 ± 0.05 M
Radius2.0 ± 0.2 R
Luminosity1.2 L
Temperature4,250 ± 50 K
Rotation2.741 days
Rotational velocity (v sin i)30.5 ± 0.5 km/s
Age~2 Myr
Other designations
V830 Tauri, IRAS C04301+2427, 2MASS J04331003+2433433
Database references

V830 Tauri is a star located 427 light-years (or 131 parsecs) away from the Sun in the constellation Taurus.[5] This star is very young, with an age of only 2 million years,[5][6] compared to the Sun's age, which is 4.6 billion years. The star has an exoplanet orbiting around it.


V830 Tauri is an M-type star.[5] The star has a mass of roughly 1 solar mass, but has a radius of 2 solar radii,[5][6] due to the star's age, which means that it hasn't fully contracted yet to become a main-sequence star. It has a surface temperature of 4250 K.[5][6] For comparison, the Sun's surface temperature is 5,772 K.

V830 Tauri is a T Tauri star, a pre-main sequence star that has a surrounding disc producing emission lines in its spectrum. It is classified as a weak-lined T Tauri star.[3] It is also classified as a BY Draconis variable, cool stars with starspots and chromospheric activity that vary in brightness as they rotate.[2] The variable period of 2.74 days matches the rotation period.[3]


On June 20, 2016, an exoplanet was found via radial velocity.[5][6] It is one of the if not the youngest exoplanet ever found. The exoplanet has a mass of about 0.77 masses of Jupiter and is orbiting 0.057 AU away from its host star with a period of 4.93 days and an inclination of 55 degrees.[5][6]


  1. ^ a b Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally Published In: 2003yCat.2246....0C. 2246. Bibcode:2003yCat.2246....0C.
  2. ^ a b c Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally Published In: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  3. ^ a b c d e Donati, J. F.; Moutou, C.; Malo, L.; Baruteau, C.; Yu, L.; Hébrard, E.; Hussain, G.; Alencar, S.; Ménard, F.; Bouvier, J.; Petit, P.; Takami, M.; Doyon, R.; Cameron, A. Collier (2016). "A hot Jupiter orbiting a 2-million-year-old solar-mass T Tauri star". Nature. 534 (7609): 662–6. arXiv:1606.06236. Bibcode:2016Natur.534..662D. doi:10.1038/nature18305. PMID 27324847.
  4. ^ Strassmeier, Klaus G. (2009). "Starspots". The Astronomy and Astrophysics Review. 17 (3): 251–308. Bibcode:2009A&ARv..17..251S. doi:10.1007/s00159-009-0020-6.
  5. ^ a b c d e f g "The Extrasolar Planet Encyclopaedia — V830 Tau b". exoplanet.eu. Retrieved 2017-07-30.
  6. ^ a b c d e "V830 Tau b". exoplanetarchive.ipac.caltech.edu. Retrieved 2017-07-30.