Star in the constellation Capricornus
Psi Capricorni Location of ψ Capricorni (circled)
Observation dataEpoch J2000 Equinox J2000 Constellation Capricornus Right ascension 20h 46m 05.733s [ 1] Declination −25° 16′ 15.23″[ 1] Apparent magnitude (V)4.13[ 2] Characteristics Evolutionary stage main sequence Spectral type F5 V[ 3] U−Bcolor index −0.03[ 2] B−Vcolor index +0.42[ 2] Astrometry Radial velocity (Rv )+20.3[ 4] km/s Proper motion (μ)RA: −52.557mas /yr [ 1] Dec.: −156.935mas /yr [ 1] Parallax (π)68.3370± 0.1823 mas [ 1] Distance 47.7 ± 0.1 ly pc ) Absolute magnitude (MV )3.33[ 5] Details Mass +0.12 [ 6] M ☉ Radius ± 0.03[ 6] R ☉ Luminosity +0.18 [ 6] L ☉ Surface gravity (log g )4.25[ 7] cgs Temperature +56 [ 6] K Metallicity [Fe/H] 0.15[ 7] dex Rotational velocity (v sin i )± 2.0[ 8] Age +0.36 [ 6] Gyr Other designations ψ Cap ,16 Capricorni ,CD −25°15018FK5 779GC 28929GJ 805HD 197692HIP 102485HR 7936SAO 189664PLX 4947.00[ 9] Database references SIMBAD data
Psi Capricorni is a single,[ 10] star in the southernzodiac constellation ofCapricornus . Its name is aBayer designation that isLatinized from ψ Capricorni, and abbreviated Psi Cap or ψ Cap. This star is faintly visible to the naked eye with anapparent visual magnitude of +4.13.[ 2] light-years (14.6 pc ) based onparallax measurements,[ 1] radial velocity of +20 km/s.[ 4] [ 11]
This object is anF-type main-sequence star with astellar classification of F5 V.[ 3] mass of the Sun .[ 6] [ 8] Sun has an equatorial rotation velocity of 2 km/s). Analysis of the line profile of the star's spectrum indicates that it is undergoingdifferential rotation , with the variation by latitude being similar to the Sun.[ 12] Sun's radius and is radiating 3.77 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 6,589 K.[ 6] infrared excess , suggesting the presence of an orbitingdebris disk at a separation ofAU [ 13]
InChinese ,天田 Tiān Tián Celestial Farmland ω Capricorni ,3 Piscis Austrini , and24 Capricorni .[ 14] Chinese name for ω Capricorni itself is天田四 Tiān Tián sì the Fourth Star of Celestial Farmland ).[ 15]
InR. H. Allen 's version, this star represented the battle-axeYue .[ 16]
^a b c d e 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 atVizieR .^a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data ,SIMBAD ,Bibcode :1986EgUBV........0M . ^a b Ehrenreich, D.; et al. (November 2010), "Deep infrared imaging of close companions to austral A- and F-type stars",Astronomy and Astrophysics ,523 : A73,arXiv :1007.0002 Bibcode :2010A&A...523A..73E ,doi :10.1051/0004-6361/201014763 ,S2CID 54913363 . ^a b Nordström, B.; et al. (2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ~14000 F and G dwarfs",Publications of the Astronomical Society of Australia ,21 (2):129– 133,arXiv :0811.3982 Bibcode :2004PASA...21..129N ,doi :10.1071/AS04013 ,S2CID 123457673 . ^ Reiners, Ansgar (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation",Astronomy and Astrophysics ,446 (1):267– 277,arXiv :astro-ph/0509399 Bibcode :2006A&A...446..267R ,doi :10.1051/0004-6361:20053911 ,S2CID 8642707 ^a b c d e f g Harada, Caleb K.; et al. (June 2024), "Setting the Stage for the Search for Life with the Habitable Worlds Observatory: Properties of 164 Promising Planet-survey Targets",The Astrophysical Journal Supplement Series ,272 (2), id. 30,arXiv :2401.03047 Bibcode :2024ApJS..272...30H ,doi :10.3847/1538-4365/ad3e81 ^a b Luck, R. Earle (March 2018), "Abundances in the Local Region. III. Southern F, G, and K Dwarfs",The Astronomical Journal ,155 (3): 31,Bibcode :2018AJ....155..111L ,doi :10.3847/1538-3881/aaa9b5 S2CID 125765376 , 111. ^a b Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?",Astronomy & Astrophysics ,542 : A116,arXiv :1204.2459 Bibcode :2012A&A...542A.116A ,doi :10.1051/0004-6361/201118724 ,S2CID 53666672 . ^ "psi Cap" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2019-10-24 .^ 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,arXiv :0806.2878 Bibcode :2008MNRAS.389..869E ,doi :10.1111/j.1365-2966.2008.13596.x S2CID 14878976 . ^ Bailer-Jones, C. A. L. (March 2015), "Close encounters of the stellar kind",Astronomy & Astrophysics ,575 : 13,arXiv :1412.3648 Bibcode :2015A&A...575A..35B ,doi :10.1051/0004-6361/201425221 ,S2CID 59039482 , A35. ^ Reiners, Ansgar; et al. (September 2001), "Detection of differential rotation in psi Cap with profile analysis",Astronomy and Astrophysics ,376 :L13– L16,arXiv :astro-ph/0107332 Bibcode :2001A&A...376L..13R ,doi :10.1051/0004-6361:20011023 ,S2CID 14762283 . ^ Gáspár, András; et al. (2016), "The Correlation between Metallicity and Debris Disk Mass",The Astrophysical Journal ,826 (2): 171,arXiv :1604.07403 Bibcode :2016ApJ...826..171G ,doi :10.3847/0004-637X/826/2/171 S2CID 119241004 . ^ (in Chinese) 中國星座神話 , written by 陳久金. Published by 台灣書房出版有限公司, 2005,ISBN 978-986-7332-25-7 ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 Archived 2011-05-21 at theWayback Machine ^ Allen, R. H. (1963),Star Names
