Astronomy:Upsilon Piscis Austrini

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Short description: Star in the constellation Piscis Austrinus
Upsilon Piscis Austrini
Diagram showing star positions and boundaries of the Piscis Austrinus constellation and its surroundings
12px
Location of υ Piscis Austrini (circled)
Observation data
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
Mass3.5[6] M☉
Radius39[7] R☉
Luminosity387[7] L☉
Surface gravity (log g)1.84[6] cgs
Temperature4,066[8] K
Metallicity [Fe/H]+0.06[6] dex
Rotational velocity (v sin i)1.0±1.0[9] km/s
Age301[6] Myr
Other designations
υ PsA, CPD−34°9054, HD 210066, HIP 109289, HR 8433, SAO 213577[10]
Database references
SIMBADdata

Upsilon Piscis Austrini (υ Piscis Austrini) is a solitary,[11] 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.[12] 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.[13]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 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. ↑ 3.0 3.1 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: 1982mcts.book.....H. 
  4. ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (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, doi:10.1088/0004-6256/146/4/73, Bibcode: 2013AJ....146...73P. 
  6. ↑ 6.0 6.1 6.2 6.3 Borisov, Sviatoslav B.; Chilingarian, Igor V.; Rubtsov, Evgenii V.; Ledoux, Cédric; Melo, Claudio; Grishin, Kirill A.; Katkov, Ivan Yu.; Goradzhanov, Vladimir S. et al. (2023). "New Generation Stellar Spectral Libraries in the Optical and Near-infrared. I. The Recalibrated UVES-POP Library for Stellar Population Synthesis". The Astrophysical Journal Supplement Series 266 (1): 11. doi:10.3847/1538-4365/acc321. Bibcode: 2023ApJS..266...11B. 
  7. ↑ 7.0 7.1 Fetherolf, Tara; Pepper, Joshua; Simpson, Emilie; Kane, Stephen R.; Močnik, Teo; English, John Edward; Antoci, Victoria; Huber, Daniel et al. (2023). "Variability Catalog of Stars Observed during the TESS Prime Mission". The Astrophysical Journal Supplement Series 268 (1): 4. doi:10.3847/1538-4365/acdee5. Bibcode: 2023ApJS..268....4F. 
  8. ↑ Soubiran, C. et al. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics 515: A111, doi:10.1051/0004-6361/201014247, Bibcode: 2010A&A...515A.111S. 
  9. ↑ 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, doi:10.1111/j.1365-2966.2008.13751.x, Bibcode: 2008MNRAS.390..377Z. 
  10. ↑ "ups PsA -- Star", SIMBAD Astronomical Database (Centre de Données astronomiques de Strasbourg), https://simbad.u-strasbg.fr/simbad/sim-id?Ident=ups+PsA, retrieved 2017-05-17. 
  11. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  12. ↑ McDonald, A. R. E.; Hearnshaw, J. B. (August 1983), "The Wolf 630 moving group of stars", Monthly Notices of the Royal Astronomical Society 204 (3): 841–852, doi:10.1093/mnras/204.3.841, Bibcode: 1983MNRAS.204..841M. 
  13. ↑ Upsilon Piscis Austrini (HIP 109289)



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