Astronomy:Zeta Piscis Austrini
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Short description: Star in the constellation Piscis Austrinus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Piscis Austrinus[1] |
| Right ascension | 22h 30m 53.77310s[2] |
| Declination | −26° 04′ 25.5041″[2] |
| Apparent magnitude (V) | +6.43[3] |
| Characteristics | |
| Spectral type | K1 III[4] |
| B−V color index | +1.08[3] |
| Astrometry | |
| Radial velocity (Rv) | −23.40±0.12[2] km/s |
| Proper motion (μ) | RA: +40.647[2] mas/yr Dec.: −74.044[2] mas/yr |
| Parallax (π) | 7.9457 ± 0.0243[2] mas |
| Distance | 410 ± 1 ly (125.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.83[1] |
| Details | |
| Mass | 2.9[2] M☉ |
| Radius | 11[2] R☉ |
| Luminosity | 50[2] L☉ |
| Surface gravity (log g) | 2.50[2] cgs |
| Temperature | 4,732[2] K |
| Metallicity [Fe/H] | −0.09[5] dex |
| Rotational velocity (v sin i) | 1.6[6] km/s |
| Age | 410[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Zeta Piscis Austrini, Latinized from ζ Piscis Austrini, is an orange-hued star in the southern constellation of Piscis Austrinus. It has an apparent visual magnitude of +6.43, which is near the lower limit of stars that can be seen with the naked eye. Based upon an annual parallax shift of 7.55 mas as seen from the Gaia telescope, the star is located 410±1 light years from the Sun.[2] This is an evolved K-type giant star with a stellar classification of K1 III.[4] It is a suspected variable star.[8]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 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.
- ↑ Bellazzini, M.; Massari, D.; De Angeli, F.; Mucciarelli, A.; Bragaglia, A.; Riello, M.; Montegriffo, P. (2023). "Photometric metallicity for 694 233 Galactic giant stars from Gaia DR3 synthetic Strömgren photometry. Metallicity distribution functions of halo substructures". Astronomy and Astrophysics 674. doi:10.1051/0004-6361/202345921. Bibcode: 2023A&A...674A.194B.
- ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D.
- ↑ "zet PsA". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=zet+PsA.
- ↑ Demartino, Robert et al. (April 1996), "Accurate Positions Of Suspected Variable Stars Near The South Galactic Pole", Information Bulletin on Variable Stars 4322: 1, Bibcode: 1996IBVS.4322....1D.
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