[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/30-piscium-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/30-piscium-wikipedia\/","headline":"30 Piscium – Wikipedia","name":"30 Piscium – Wikipedia","description":"before-content-x4 From Wikipedia, the free encyclopedia after-content-x4 Star in the constellation Pisces 30 Piscium after-content-x4 Location of 30 (also called","datePublished":"2016-06-23","dateModified":"2016-06-23","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/e\/e4\/Pisces_constellation_map.svg\/240px-Pisces_constellation_map.svg.png","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/e\/e4\/Pisces_constellation_map.svg\/240px-Pisces_constellation_map.svg.png","height":"240","width":"240"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/30-piscium-wikipedia\/","about":["Wiki"],"wordCount":3879,"articleBody":"     (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4From Wikipedia, the free encyclopedia       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Star in the constellation Pisces30 Piscium       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Location of 30 (also called YY) Piscium (circled). It presents in a narrow triangle with two other stars of similar brightness, 27 and 33 Piscium.Observation dataEpoch J2000\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Equinox J2000ConstellationPiscesRight ascension00h 01m 57.61523s[1]Declination\u221206\u00b0\u00a000\u2032\u00a050.6684\u2033[1]Apparent\u00a0magnitude\u00a0(V)4.31 \u2013 4.41[2]CharacteristicsSpectral\u00a0typeM3\u00a0III[3]B\u2212V color index1.631\u00b10.011[4]Variable\u00a0typeLPV,[5]LB?[2]AstrometryRadial velocity (Rv)\u221211.7\u00b10.5[6]\u00a0km\/sProper motion (\u03bc) RA:\u00a0+51.158[1]\u00a0mas\/yr Dec.:\u00a0\u221239.551[1]\u00a0mas\/yr Parallax (\u03c0)7.8859\u00a0\u00b1\u00a00.4358\u00a0mas[1]Distance410 \u00b1 20\u00a0ly (127 \u00b1 7\u00a0pc)Absolute\u00a0magnitude\u00a0(MV)\u22121.20[5]DetailsRadius73.66+16.69\u22126.79[1]\u00a0R\u2609Luminosity1,148.5\u00b171.1[1]\u00a0L\u2609Surface gravity (log\u00a0g)2[7]\u00a0cgsTemperature3,647[7]\u00a0KOther designationsDatabase referencesSIMBADdata30 Piscium (HIP 154) is a solitary[9]variable star in the zodiac constellation of Pisces. It is visible to the naked eye with an apparent visual magnitude of 4.37.[7] Its calculated mid-value of antiposed parallax shift as the earth moves around the sun of very roughly 7.8859\u00a0mas, makes it around 410\u00a0light years away. Its net movement in the present epoch is one of moving closer \u2013 radial velocity (speed away from our star system) is \u221212\u00a0km\/s.[6]  This is an aging red giant star with a stellar classification of M3\u00a0III,[3] indicating it has exhausted the hydrogen at its core and evolved off the main sequence. It is a candidate long-period variable star[5] and has been given the designation YY Psc.[11] It varies in brightness between magnitudes 4.31 and 4.41 with no clear period. Possible periods of 23.1, 32.0, 53.6, and 167.8 days have been identified.[10] The star has 74 times the Sun’s radius and is radiating 1,148.5[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,647\u00a0K.[7]References[edit]^ a b c d e f g h Brown, A. G. A.;  et\u00a0al. (Gaia collaboration) (August 2018). “Gaia Data Release 2: Summary of the contents and survey properties”. Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A…616A…1G. doi:10.1051\/0004-6361\/201833051. Gaia DR2 record for this source at VizieR.^ a b Samus, N. N.; Durlevich, O. V.;  et\u00a0al. (2009). “VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)”. VizieR On-line Data Catalog: B\/GCVS. Originally Published in: 2009yCat….102025S. 1. Bibcode:2009yCat….102025S.^ a b Keenan, P.; McNeil, R. (October 1989), “The Perkins catalog of revised MK types for the cooler stars”, Astrophysical Journal Supplement Series, 71: 245\u2013266, Bibcode:1989ApJS…71..245K, doi:10.1086\/191373.^ 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\u00a0119257644.^ a b c Rimoldini, L.;  et\u00a0al. (December 2012), “Automated classification of Hipparcos unsolved variables”, Monthly Notices of the Royal Astronomical Society, 427 (4): 2917\u20132937, arXiv:1301.1545, Bibcode:2012MNRAS.427.2917R, doi:10.1111\/j.1365-2966.2012.21752.x, S2CID\u00a0119191320.^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), “Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project”, Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A…546A..61D, doi:10.1051\/0004-6361\/201219219, S2CID\u00a059451347, A61.^ a b c d P\u00e9rez Mart\u00ednez, M. I.;  et\u00a0al. (November 2014), “The non-active stellar chromosphere: Ca II basal flux”, Monthly Notices of the Royal Astronomical Society, 445 (1): 270\u2013279, Bibcode:2014MNRAS.445..270P, doi:10.1093\/mnras\/stu1706.^ “30 Psc”. SIMBAD. Centre de donn\u00e9es astronomiques de Strasbourg. Retrieved 2018-03-10.^ 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\u2013879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111\/j.1365-2966.2008.13596.x, S2CID\u00a014878976.^ a b Tabur, V; Bedding, T. R; Kiss, L. L; Moon, T. T; Szeidl, B; Kjeldsen, H (2009). “Long-term photometry and periods for 261 nearby pulsating M giants”. Monthly Notices of the Royal Astronomical Society. 400 (4): 1945. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111\/j.1365-2966.2009.15588.x. S2CID\u00a015358380.^ Kukarkin, B. V.;  et\u00a0al. (January 1975), “60th Name-List of Variable Stars”, Information Bulletin on Variable Stars, 961: 1, Bibcode:1975IBVS..961….1K.       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/30-piscium-wikipedia\/#breadcrumbitem","name":"30 Piscium – Wikipedia"}}]}]