Tau3 Gruis

Tau3 Gruis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Grus
Right ascension 22h 56m 47.80014s[1]
Declination −47° 58′ 09.1951″[1]
Apparent magnitude (V) 5.71[2]
Characteristics
Spectral type kA5hA7mF2[3]
U−B color index +0.17[2]
B−V color index +0.22[2]
Astrometry
Proper motion (μ) RA: −25.18[1] mas/yr
Dec.: +2.07[1] mas/yr
Parallax (π)13.40 ± 0.34[1] mas
Distance243 ± 6 ly
(75 ± 2 pc)
Other designations
τ Gru, CD−48° 14364, FK5 3832, HD 216823, HIP 113307, HR 8722, SAO 231364[4]
Database references
SIMBADdata

Tau3 Gruis is a solitary,[5] white-hued star in the southern constellation of Grus. Its apparent magnitude is 5.71,[2] which is bright enough to be faintly visible to the naked eye. Located around 243 light-years (75 pc) distant, it is a A-type chemically peculiar star of spectral type kA5hA7mF2.[3] This notation indicates the spectrum displays the K-line of an A5 star, the hydrogen lines of an A7 star, and the metal lines of an F2 star.[6]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 Freely accessible, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 4 Feinstein, A. (1974), "Photoelectric UBVRI observations of Am stars", Astronomical Journal, 79: 1290, Bibcode:1974AJ.....79.1290F, doi:10.1086/111675.
  3. 1 2 Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
  4. ↑ "tau03 Gru -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-06-24.
  5. ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, arXiv:0806.2878 Freely accessible, doi:10.1111/j.1365-2966.2008.13596.x.
  6. ↑ Gray, Richard O.; Corbally, J. (2009), Stellar Spectral Classification, Princeton University Press, p. 178, ISBN 0691125112.
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