Upsilon Piscis Austrini

Upsilon Piscis Austrini
Diagram showing star positions and boundaries of the Piscis Austrinus constellation and its surroundings


Location of υ Piscis Austrini (circled)

Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Piscis Austrinus
Right ascension 22h 08m 25.93132s[1]
Declination −34° 02′ 37.8248″[1]
Apparent magnitude (V) +4.98[2]
Characteristics
Spectral type K4 III[3]
B−V color index +1.50[2]
Astrometry
Radial velocity (Rv)+20.1[4] km/s
Proper motion (μ) RA: +4.55[1] mas/yr
Dec.: −49.02[1] mas/yr
Parallax (π)7.69 ± 0.22[1] mas
Distance420 ± 10 ly
(130 ± 4 pc)
Absolute magnitude (MV)−0.47±0.062[5]
Details
Temperature4,066[6] K
Rotational velocity (v sin i)1.0±1.0[7] km/s
Other designations
υ PsA, CPD−34° 9054, HD 210066, HIP 109289, HR 8433, SAO 213577[8]
Database references
SIMBADdata

Upsilon Piscis Austrini (υ Piscis Austrini) is a solitary,[9] orange-hued star in the southern constellation of Piscis Austrinus. It is faintly visible to the naked eye with an apparent visual magnitude of +4.98.[2] Based upon an annual parallax shift of 7.69 mas as seen from the Earth,[1] the star is located 420 light years from the Sun.

This is an evolved K-type giant star with a stellar classification of K4 III.[3] It is catalogued as a member of the Wolf 630 moving group.[10] Upsilon Piscis Austrini is moving through the Galaxy at a speed of 36.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 17,700 and 25,400 light years from the center of the Galaxy.[11]

References

  1. 1 2 3 4 5 6 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 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
  3. 1 2 Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 3, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode:1982MSS...C03....0H.
  4. ↑ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W.
  5. ↑ Park, Sunkyung; et al. (2013), "Wilson-Bappu Effect: Extended to Surface Gravity", The Astronomical Journal, 146 (4): 73, Bibcode:2013AJ....146...73P, arXiv:1307.0592 Freely accessible, doi:10.1088/0004-6256/146/4/73.
  6. ↑ Soubiran, C.; et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, Bibcode:2010A&A...515A.111S, arXiv:1004.1069 Freely accessible, doi:10.1051/0004-6361/201014247.
  7. ↑ Zamanov, R. K.; et al. (October 2008), "Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics", Monthly Notices of the Royal Astronomical Society, 390 (1): 377−382, Bibcode:2008MNRAS.390..377Z, arXiv:0807.3817 Freely accessible, doi:10.1111/j.1365-2966.2008.13751.x.
  8. ↑ "ups PsA -- Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-05-17.
  9. ↑ 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.
  10. ↑ McDonald, A. R. E.; Hearnshaw, J. B. (August 1983), "The Wolf 630 moving group of stars", Monthly Notices of the Royal Astronomical Society, 204: 841−852, Bibcode:1983MNRAS.204..841M, doi:10.1093/mnras/204.3.841.
  11. ↑ Upsilon Piscis Austrini (HIP 109289)
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