| 释义 |
- References
{{hatnote|For other stars with this Bayer designation, see Zeta Scorpii.}}{{DISPLAYTITLE:Zeta2 Scorpii}}{{Starbox begin
| name = ζ2 Scorpii}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0 (ICRS)
| constell = Scorpius
| ra = {{RA|16|54|35.00435}}
| dec = {{DEC|−42|21|40.7407}}
| appmag_v = {{nowrap|3.59 to 3.65}}[3]
}}{{Starbox character
| class = K4 III[4]
| u-b = +1.65[5]
| b-v = +1.37[5]
| r-i = +0.68[5]
}}{{Starbox astrometry
| radial_v = {{Val|−18.7|0.9}}[8]
| prop_mo_ra = −127.72
| prop_mo_dec = −229.44
| parallax = 24.65
| p_error = 0.27
| parallax_footnote =
| absmag_v = {{val|0.30|0.09}}[12]
}}{{Starbox detail
| mass = {{val|1.19|0.14}}[12]
| radius = {{val|21.0|1.6}}[12]
| temperature = 4,169[12]
| metal_fe = +0.06[12]
| gravity = {{val|1.84|0.10}}[12]
| rotational_velocity = 2.30[18]
| age_gyr = {{val|5.80|2.26}}[12]
}}{{Starbox catalog
| names=ζ2 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.[20]
}}{{Starbox reference
| Simbad=zet02+Sco
}}{{Starbox end}}Zeta2 Scorpii (Zeta2 Sco, ζ2 Scorpii, ζ2 Sco) is a K-type orange giant star in the constellation of Scorpius.[20] It has an apparent visual magnitude which varies between 3.59 and 3.65,[3] 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 cluster NGC 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 astrophographs. References1. ^1 2 3 4 5 6 7 {{citation | display-authors=1 | last1=da Silva | first1=L. | last2=Girardi | first2=L. | last3=Pasquini | first3=L. | last4=Setiawan | first4=J. | last5=von der Lühe | first5=O. | last6=de Medeiros | first6=J. R. | last7=Hatzes | first7=A. | last8=Döllinger | first8=M. P. | last9=Weiss | first9=A. | title=Basic physical parameters of a selected sample of evolved stars | journal=Astronomy and Astrophysics | volume=458 | issue=2 | pages=609–623 |date=November 2006 | doi=10.1051/0004-6361:20065105 | bibcode=2006A&A...458..609D | arxiv=astro-ph/0608160 | postscript=. }}
2. ^1 {{citation | title=Spectral Types on the MK System for Forty-Three Bright Southern Stars, K2-M6 | last1=Landi Dessy | first1=J. | last2=Keenan | first2=P. C. | journal=Astrophysical Journal | volume=146 | pages=587 | date=November 1966 | doi=10.1086/148925 | bibcode=1966ApJ...146..587L | postscript=. }}
3. ^1 {{citation | last1=Jofré | first1=E.| last2=Petrucci| first2=R. | last3=Saffe| first3=C. | last4=Saker | first4=L. | last5=de la Villarmois | first5=E. Artur | last6=Chavero | first6=C. | last7= Gómez | first7=M. | last8= Mauas | first8=P. J. D. | title=Stellar parameters and chemical abundances of 223 evolved stars with and without planets | journal=Astronomy & Astrophysics | volume=574 | id=A50 | year=2015 | bibcode= 2015A&A...574A..50J | doi=10.1051/0004-6361/201424474 | postscript=. |arxiv = 1410.6422 }}
4. ^1 {{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | title=The Revision of the General Catalogue of Radial Velocities | work=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | location=University of Toronto | publisher=International Astronomical Union | bibcode=1967IAUS...30...57E | postscript=. }}
5. ^1 2 3 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.
6. ^1 2 NSV 8028, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 20, 2009.
7. ^1 2 {{cite simbad | title=zet02 Sco | accessdate=2016-09-20 | postscript=. }}
}}{{Stars of Scorpius|state=collapsed}} 8 : Scorpius (constellation)|K-type giants|Bayer objects|Henry Draper Catalogue objects|Hipparcos objects|Suspected variables|HR objects|Durchmusterung objects |