Upsilon Gruis

υ Gruis
Observation data
Epoch J2000      Equinox J2000
Constellation Grus
Right ascension 23h 06m 53.62552s[1]
Declination −38° 53′ 32.2484″[1]
Apparent magnitude (V) 5.614[2]
Characteristics
Spectral type A1V[3]
B−V color index +0.01[4]
Astrometry
Radial velocity (Rv)+16[5] km/s
Proper motion (μ) RA: +34.31[1] mas/yr
Dec.: +6.40[1] mas/yr
Parallax (π)11.45 ± 0.56 mas[1]
Distance280 ± 10 ly
(87 ± 4 pc)
Absolute magnitude (MV)+0.92[6]
Details
Radius2.2[7] R☉
Luminosity42[6] L☉
Temperature10,141 ± 290[2] K
Rotational velocity (v sin i)320[8] km/s
Other designations
υ Gru, CD−39° 14936, HD 218242, HIP 114132, HR 8790, SAO 214313.[9]
Database references
SIMBADdata

υ Gruis, Latinised as Upsilon Gruis, is a double star in the southern constellation of Grus. The apparent magnitude is 5.61, which is bright enough to be viewed with the naked eye. Located around 87 parsecs (280 ly) distant, the white-hued primary is an A-type main-sequence star of spectral type A1V, a star that is currently fusing its core hydrogen. it is spinning rapidly with a projected rotational velocity of 320 km/s. The companion is a magnitude 8.24 star at an angular separation of 0.90″ from the primary along a position angle of 205°, as of 2009.[10]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference aaa458_1_293 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference houk1979 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference aass34_1 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcrv1953 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 Cadars2001 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa463_2_671 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).