Omega2 Tauri

For other stars with this Bayer designation, see ω Tauri.
Omega2 Tauri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Taurus
Right ascension 04h 17m 15.66155s[1]
Declination +20° 34′ 42.9340″[1]
Apparent magnitude (V) +4.914[2]
Characteristics
Spectral type A3m[3]
B−V color index +0.259[4]
Astrometry
Radial velocity (Rv)+15.0±0.6[5] km/s
Proper motion (μ) RA: −39.41[1] mas/yr
Dec.: −60.79[1] mas/yr
Parallax (π)34.55 ± 0.38 mas[1]
Distance94 ± 1 ly
(28.9 ± 0.3 pc)
Absolute magnitude (MV)+2.62[6]
Details
Mass1.9±0.1[3] M☉
Radius1.514±0.044[7] R☉
Luminosity6.6[8] L☉
Temperature7,541±137[7] K
Rotational velocity (v sin i)70.1[4] km/s
Age100[4] Myr
Other designations
ω2 Tau, 50 Tau, BD+20° 724, HD 27045, HIP 19990, HR 1329, SAO 76532[9]
Database references
SIMBADdata

Omega2 Tauri is a solitary,[10] white hued star in the zodiac constellation of Taurus. It has an apparent visual magnitude of +4.9,[2] which is bright enough to be seen with the naked eye at night. The distance to this system, as determined using an annual parallax shift of 34.55 mas as seen from the Earth,[1] is about 94 light years.

This is a young Am star with an age of around 100 million[4] years and a stellar classification of A3m.[3] It displays an infrared excess emission, indicating the presence of an orbiting debris disk with a mean temperature of 99 K.[11] This star is a probable member of the Octans Near association, a nearby moving group of stars that share a common motion through space.[4]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Hog2000 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Zuckerman2013 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference masana2006 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Su2006 was invoked but never defined (see the help page).