Zeta2 Scorpii (Zeta2 Sco, ζ2 Scorpii, ζ2 Sco) is a K-type orange giantstar in the constellation of Scorpius.[8] It has an apparent visual magnitude which varies between 3.59 and 3.65,[2] and is located near the blue-white supergiant star ζ1 Scorpii in Earth's sky. In astronomical terms, ζ2 is much closer to the Sun and unrelated to ζ1 except for line-of sight co-incidence. ζ1 is 5,700 light-years away and probably an outlying member of open star clusterNGC 6231 (also known as the "northern jewel box" cluster), whereas ζ2 is a mere 132 lightyears distant and thus much less luminous in real terms. ζ2 can also be distinguished from its optical partner, ζ1, because of its orangish colour especially in long-exposure astrophotographs.
Reddish ζ2 Scorpii alongside the fainter ζ1 Scorpii to the south of NGC 6231
ReferencesEdit
^ abcdevan Leeuwen, F. (November 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.
^ abNSV 8028, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 20, 2009.
^Landi Dessy, J.; Keenan, P. C. (November 1966), "Spectral Types on the MK System for Forty-Three Bright Southern Stars, K2-M6", Astrophysical Journal, 146: 587, Bibcode:1966ApJ...146..587L, doi:10.1086/148925.
^ abcHR 6271, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 20, 2009.
^Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick (eds.), "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, University of Toronto: International Astronomical Union, vol. 30, p. 57, Bibcode:1967IAUS...30...57E.
^ abcdefgda Silva, L.; et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics, 458 (2): 609–623, arXiv:astro-ph/0608160, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105, S2CID 9341088.
^Jofré, E.; Petrucci, R.; Saffe, C.; Saker, L.; de la Villarmois, E. Artur; Chavero, C.; Gómez, M.; Mauas, P. J. D. (2015), "Stellar parameters and chemical abundances of 223 evolved stars with and without planets", Astronomy & Astrophysics, 574: A50, arXiv:1410.6422, Bibcode:2015A&A...574A..50J, doi:10.1051/0004-6361/201424474, S2CID 53666931, A50.
zeta2, scorpii, other, stars, with, this, bayer, designation, zeta, scorpii, zeta2, scorpii, type, orange, giant, star, constellation, scorpius, apparent, visual, magnitude, which, varies, between, located, near, blue, white, supergiant, star, scorpii, earth, . For other stars with this Bayer designation see Zeta Scorpii Zeta2 Scorpii Zeta2 Sco z2 Scorpii z2 Sco is a K type orange giant star in the constellation of Scorpius 8 It has an apparent visual magnitude which varies between 3 59 and 3 65 2 and is located near the blue white supergiant star z1 Scorpii in Earth s sky In astronomical terms z2 is much closer to the Sun and unrelated to z1 except for line of sight co incidence z1 is 5 700 light years away and probably an outlying member of open star cluster NGC 6231 also known as the northern jewel box cluster whereas z2 is a mere 132 lightyears distant and thus much less luminous in real terms z2 can also be distinguished from its optical partner z1 because of its orangish colour especially in long exposure astrophotographs z2 Scorpii Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation ScorpiusRight ascension 16h 54m 35 00435s 1 Declination 42 21 40 7407 1 Apparent magnitude V 3 59 to 3 65 2 CharacteristicsSpectral type K4 III 3 U B color index 1 65 4 B V color index 1 37 4 R I color index 0 68 4 AstrometryRadial velocity Rv 18 7 0 9 5 km sProper motion m RA 127 72 1 mas yr Dec 229 44 1 mas yrParallax p 24 65 0 27 mas 1 Distance132 1 ly 40 6 0 4 pc Absolute magnitude MV 0 30 0 09 6 DetailsMass1 19 0 14 6 M Radius21 0 1 6 6 R Surface gravity log g 1 84 0 10 6 cgsTemperature4 169 6 KMetallicity Fe H 0 06 6 dexRotational velocity v sin i 2 30 7 km sAge5 80 2 26 6 GyrOther designationsz2 Sco Zeta2 Scorpii Zeta2 Sco CD 42 11646 CPD 42 7549 GC 22751 HD 152334 HIP 82729 HR 6271 LTT 6737 NLTT 43744 PPM 322371 SAO 227402 8 Database referencesSIMBADdataReddish z2 Scorpii alongside the fainter z1 Scorpii to the south of NGC 6231References Edit a b c d e van Leeuwen F November 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 NSV 8028 database entry New Catalogue of Suspected Variable Stars the improved version Sternberg Astronomical Institute Moscow Russia Accessed on line November 20 2009 Landi Dessy J Keenan P C November 1966 Spectral Types on the MK System for Forty Three Bright Southern Stars K2 M6 Astrophysical Journal 146 587 Bibcode 1966ApJ 146 587L doi 10 1086 148925 a b c HR 6271 database entry The Bright Star Catalogue 5th Revised Ed Preliminary Version D Hoffleit and W H Warren Jr CDS ID V 50 Accessed on line November 20 2009 Evans D S June 20 24 1966 Batten Alan Henry Heard John Frederick eds The Revision of the General Catalogue of Radial Velocities Determination of Radial Velocities and their Applications Proceedings from IAU Symposium no 30 University of Toronto International Astronomical Union vol 30 p 57 Bibcode 1967IAUS 30 57E a b c d e f g da Silva L et al November 2006 Basic physical parameters of a selected sample of evolved stars Astronomy and Astrophysics 458 2 609 623 arXiv astro ph 0608160 Bibcode 2006A amp A 458 609D doi 10 1051 0004 6361 20065105 S2CID 9341088 Jofre E Petrucci R Saffe C Saker L de la Villarmois E Artur Chavero C Gomez M Mauas P J D 2015 Stellar parameters and chemical abundances of 223 evolved stars with and without planets Astronomy amp Astrophysics 574 A50 arXiv 1410 6422 Bibcode 2015A amp A 574A 50J doi 10 1051 0004 6361 201424474 S2CID 53666931 A50 a b zet02 Sco SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2016 09 20 Retrieved from https en wikipedia org w index php title Zeta2 Scorpii amp oldid 1170118840, wikipedia, wiki, book, books, library,
