Xi Piscium Binary star system in the constellation Pisces
Xi Piscium
Location of ξ Piscium (circled)
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS )
Constellation Pisces [ 1]
Right ascension 01h 52m 33.34s [ 2]
Declination +03° 11′ 15.1″ [ 2]
Apparent magnitude (V)4.60[ 3]
Characteristics
Evolutionary stage red clump [ 4]
Spectral type K0 III[ 5]
U−B color index
+0.74[ 3]
B−V color index
+0.95[ 3]
Astrometry Radial velocity (Rv )+26.13[ 5] km/s Proper motion (μ) RA: +32.687[ 2] mas /yr Dec.: +25.146[ 2] mas /yr Parallax (π)16.6641± 0.2416 mas [ 2] Distance 196 ± 3 ly pc ) Absolute magnitude (MV )+0.78[ 1] Orbit [ 6] Period (P)672 .4± 1.4 dEccentricity (e)± 0.03Periastron epoch (T)2437651 ± 40 JD Argument of periastron (ω)± 9° Semi-amplitude 1 )± 0.14 km/sDetails ξ Psc A Mass 2.00[ 5] M ☉ Radius 9[ 7] R ☉ Luminosity 45.7[ 5] L ☉ Surface gravity (log g )2.8[ 7] cgs Temperature ± 25[ 5] K Metallicity [Fe/H] −0.11[ 7] dex Rotational velocity (v sin i )0.0[ 7] km/s Age 1.22[ 5] Gyr Other designations ξ Psc, ξ Psc , 111 Piscium , BD +02°290FK5 65HD 11559HIP 8833HR 549SAO 110206WDS J02020+246AB[ 8] Database references SIMBAD data
Xi Piscium (ξ Piscium ) is an orange-hued binary star [ 9] zodiac constellation of Pisces . In 1690, the astronomer Johannes Hevelius in his Firmamentum Sobiescianum regarded the constellation Pisces as being composed of four subdivisions. Xi Piscium was considered to be part of the Linum Austrinum , the South Cord.[ 10] apparent visual magnitude of 4.60.[ 3] parallax shift of 16.7 mas as seen from Earth, it is located about 196 light years from the Sun . It is moving away from the Sun, having a radial velocity of +26 km/s.[ 5]
This is a single-lined spectroscopic binary system with an orbital period of 4.6 years and an eccentricity of around 0.18.[ 6] William Wallace Campbell using the Mills spectrograph at the Lick Observatory .[ 11] evolved K-type giant star with a stellar classification of K0 III.[ 5] red clump star, which indicates it is generating energy through helium fusion at its core.[ 4]
References
1 2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331, arXiv :1108.4971 Bibcode :2012AstL...38..331A , doi :10.1134/S1063773712050015 , S2CID 119257644 . 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1. arXiv :2208.00211 Bibcode :2023A& A...674A...1G . doi :10.1051/0004-6361/202243940 S2CID 244398875 .
Gaia DR3 record for this source at VizieR . 1 2 3 4 Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society 133 (4): 475– 493, Bibcode :1966MNRAS.133..475A , doi :10.1093/mnras/133.4.475 1 2 Tautvaišienė, G.; et al. (December 2010), "C, N and O abundances in red clump stars of the Milky Way", Monthly Notices of the Royal Astronomical Society 409 (3): 1213– 1219, arXiv :1007.4064 Bibcode :2010MNRAS.409.1213T , doi :10.1111/j.1365-2966.2010.17381.x S2CID 119182458 . 1 2 3 4 5 6 7 8 Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal , 150 (3): 23, arXiv :1507.01466 Bibcode :2015AJ....150...88L , doi :10.1088/0004-6256/150/3/88 , S2CID 118505114 , 88. 1 2 Pourbaix, D.; et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics , 424 : 727– 732, arXiv :astro-ph/0406573 Bibcode :2004A& A...424..727P , doi :10.1051/0004-6361:20041213 , S2CID 119387088 . 1 2 3 4 Massarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity", The Astronomical Journal , 135 (1): 209– 231, Bibcode :2008AJ....135..209M , doi :10.1088/0004-6256/135/1/209 ↑ "xi. Psc" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2017-07-25 .↑ Griffin, R. F.; Herbig, G. H. (1981), "Spectroscopic Orbits of Xi Piscium 60 Andromedae and ξ1 Ceti", Monthly Notices of the Royal Astronomical Society 196 : 33– 43, Bibcode :1981MNRAS.196...33G , doi :10.1093/mnras/196.1.33 ↑ Hevelius, J. (1690), Firmamentum Sobiescianum , Leipzig .↑ Campbell, William Wallace (1901), "Some recent results secured with the Mills spectrograph", Lick Observatory Bulletin , 1 (4): 22– 25, Bibcode :1901LicOB...1...22C , doi :10.5479/ADS/bib/1901LicOB.1.22C ↑ "AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日" (in Chinese). Archived from the original on 2016-03-03. Retrieved 2012-08-30 .
