Pi Tauri (π Tauri) is a solitary,[9] yellow-hued star in the zodiacconstellation of Taurus. With an apparent visual magnitude of +4.69,[2] it is bright enough to be visible to the naked eye. Although it appears to lie among the stars of the Hyades cluster, it is not itself a member, being three times farther from Earth than the cluster. The distance to this star, as determined using an annual parallax shift of 7.83 mas as seen from the Earth,[1] is around 420 light years. At that range, the visual magnitude of the star is diminished by an extinction factor of 0.24 due to interstellar dust.[5]
^ abcdefvan Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
^ abKeenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
^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 59451347, A61.
^ abcdefgTakeda, Yoichi; et al. (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan, 60 (4): 781–802, arXiv:0805.2434, Bibcode:2008PASJ...60..781T, doi:10.1093/pasj/60.4.781.
^ abLang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, vol. 1 (3rd ed.), Birkhäuser, ISBN3-540-29692-1. The radius (R*) is given by:
^ abcMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
^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.
^Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039.
October 21, 2023
tauri, tauri, solitary, yellow, hued, star, zodiac, constellation, taurus, with, apparent, visual, magnitude, bright, enough, visible, naked, although, appears, among, stars, hyades, cluster, itself, member, being, three, times, farther, from, earth, than, clu. Pi Tauri p Tauri is a solitary 9 yellow hued star in the zodiac constellation of Taurus With an apparent visual magnitude of 4 69 2 it is bright enough to be visible to the naked eye Although it appears to lie among the stars of the Hyades cluster it is not itself a member being three times farther from Earth than the cluster The distance to this star as determined using an annual parallax shift of 7 83 mas as seen from the Earth 1 is around 420 light years At that range the visual magnitude of the star is diminished by an extinction factor of 0 24 due to interstellar dust 5 Pi Tauri Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation TaurusRight ascension 04h 26m 36 37093s 1 Declination 14 42 49 6126 1 Apparent magnitude V 4 69 2 CharacteristicsSpectral type G7 IIIa Fe 1 3 U B color index 0 72 2 B V color index 0 98 2 AstrometryRadial velocity Rv 31 4 0 3 4 km sProper motion m RA 9 52 1 mas yr Dec 31 44 1 mas yrParallax p 7 83 0 22 mas 1 Distance420 10 ly 128 4 pc Absolute magnitude MV 1 27 5 DetailsMass3 94 5 M Radius21 6 R Luminosity229 7 L Surface gravity log g 2 54 5 cgsTemperature5 086 7 KMetallicity Fe H 0 08 5 dexAge17 5 MyrOther designationsp Tau 73 Tau BD 14 697 HD 28100 HIP 20732 HR 1396 SAO 93935 8 Database referencesSIMBADdataThis is an evolved G type giant star with a stellar classification of G7 IIIa Fe 1 3 where the suffix notation indicates an underabundance of iron in the spectrum The measured angular diameter is 1 55 0 06 mas 10 At the estimated distance of Pi Tauri this yields a physical size of about 21 times the radius of the Sun 6 It possesses nearly four 5 times the mass of the Sun and is radiating 229 times the Sun s luminosity at an effective temperature of 5 086 K 7 References Edit a b c d e f van Leeuwen F 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b c d 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 a b Keenan Philip C McNeil Raymond C 1989 The Perkins catalog of revised MK types for the cooler stars Astrophysical Journal Supplement Series 71 245 Bibcode 1989ApJS 71 245K doi 10 1086 191373 de Bruijne J H J Eilers A C October 2012 Radial velocities for the HIPPARCOS Gaia Hundred Thousand Proper Motion project Astronomy amp Astrophysics 546 14 arXiv 1208 3048 Bibcode 2012A amp A 546A 61D doi 10 1051 0004 6361 201219219 S2CID 59451347 A61 a b c d e f g Takeda Yoichi et al August 2008 Stellar Parameters and Elemental Abundances of Late G Giants Publications of the Astronomical Society of Japan 60 4 781 802 arXiv 0805 2434 Bibcode 2008PASJ 60 781T doi 10 1093 pasj 60 4 781 a b Lang Kenneth R 2006 Astrophysical formulae Astronomy and astrophysics library vol 1 3rd ed Birkhauser ISBN 3 540 29692 1 The radius R is given by 2 R 127 7 1 55 10 3 AU 0 0046491 AU R 42 6 R displaystyle begin aligned 2 cdot R amp frac 127 7 cdot 1 55 cdot 10 3 text AU 0 0046491 text AU R bigodot amp approx 42 6 cdot R bigodot end aligned nbsp a b c McDonald I et al 2012 Fundamental Parameters and Infrared Excesses of Hipparcos Stars Monthly Notices of the Royal Astronomical Society 427 1 343 57 arXiv 1208 2037 Bibcode 2012MNRAS 427 343M doi 10 1111 j 1365 2966 2012 21873 x S2CID 118665352 pi Tau SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2017 06 30 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 Richichi A et al February 2005 CHARM2 An updated Catalog of High Angular Resolution Measurements Astronomy and Astrophysics 431 2 773 777 Bibcode 2005A amp A 431 773R doi 10 1051 0004 6361 20042039 Retrieved from https en wikipedia org w index php title Pi Tauri amp oldid 1170345108, wikipedia, wiki, book, books, library,
