Sigma2 Gruis

For other stars with this Bayer designation, see σ Gruis.
Sigma2 Gruis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 22h 36m 58.85405s[1]
Declination −40° 35′ 27.7272″[1]
Apparent magnitude (V) 5.86[2] (5.91 + 10.04)[3]
Characteristics
Spectral type A1 V[4]
U−B color index +0.06[2]
B−V color index +0.06[2]
Astrometry
Radial velocity (Rv)+15.0±2.9[5] km/s
Proper motion (μ) RA: +44.56[1] mas/yr
Dec.: −70.07[1] mas/yr
Parallax (π)15.19 ± 0.53 mas[1]
Distance215 ± 7 ly
(66 ± 2 pc)
Absolute magnitude (MV)+1.76[6]
Details[7]
σ2 Gru A
Mass2.15 M☉
Luminosity17.5[6] L☉
Surface gravity (log g)4.36±0.14 cgs
Temperature9,549±325 K
Rotational velocity (v sin i)80.9±0.7[8] km/s
Age255 Myr
Other designations
σ2 Gru, CD−41° 14963, HD 214150, HIP 111643, HR 8602, SAO 231217, WDS J22370-4035[9]
Database references
SIMBADdata

Sigma2 Gruis is a binary star[3] system in the southern constellation of Grus. Its apparent visual magnitude is 5.86.[2] The pair had an angular separation of 2.7 arc seconds along a position angle of 265°, as of 1991.[10] Located around 215 ly (66 pc) distant, the white-hued primary component is an A-type main-sequence star of spectral type A1V,[4] a star that is currently fusing its core hydrogen.

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Nicolet1978 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference David2015 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Diaz2011 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 WDSC2014 was invoked but never defined (see the help page).