请输入您要查询的百科知识:

 

词条 Pi Chamaeleontis
释义

  1. References

{{Starbox begin|name=π Chamaeleontis}}{{Starbox observe
|epoch=J2000
|constell=Chamaeleon
|ra={{RA|11|37|15.63631}}
|dec={{DEC|-75|53|47.5626}}
|appmag_v=5.64[3]
}}{{Starbox character
|class=A9 IV[4] or F1 III[5]
|b-v=+0.35[6]
|u-b=−0.01[6]
}}{{Starbox astrometry
|radial_v=−9.8 ± 3.7[8]
|prop_mo_ra=−127.94
|prop_mo_dec=−1.82
|parallax=24.09
|p_error=0.33
|parallax_footnote=
|absmag_v=2.56[12]
}}{{Starbox detail
|mass=1.52[13]
|radius=2.2[14]
|temperature=6853 ± 80[8]
|luminosity=8[14]
|gravity=4.08[13]
|metal_fe=-0.28[8]
|rotational_velocity=50[19]
|age_gyr=1.8 ± 0.1[12]
}}{{Starbox catalog
|names={{odlist|CPD=-75° 744|FK5=438|HD=101132|HIP=56675|HR=4479|SAO=256857}}
}}{{Starbox reference
|Simbad=pi.+Cha
}}{{Starbox end}}Pi Chamaeleontis (π Cha) is a star located in the constellation Chamaeleon. Its apparent magnitude is 5.64.[3] Parallax measurements by Hipparcos put the system at 135 light-years (41.5 parsecs) away.

Pi Chamaeleontis is a A-type subgiant[4] or F-type giant star with an effective temperature of about 6,900 K.[8] It has an absolute magnitude of 2.56,[12] a mass of {{solar mass|1.52}},[13] and a radius of {{solar mass|2.2}}.[14] It is roughly 1.8 billion years old.[12]

References

1. ^{{cite journal|title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures|author1=Allende Prieto, C.|author2=Lambert, D. L.|journal=Astronomy and Astrophysics|volume=352|pages=555–562|date=1999|bibcode=1999A&A...352..555A|arxiv=astro-ph/9911002}}
2. ^{{cite journal|bibcode=1975mcts.book.....H|title=University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90°.0 to -53°.0.|journal=Michigan Catalogue of two-dimensional spectral types for the HD stars|volume=1|author1=Houk, N.|author2=Cowley, A. P.|year=1975}}
3. ^{{cite journal|title=Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations|author=Kharchenko, N. V.|display-authors=etal|journal=Astronomische Nachrichten|volume=328|issue=9|page=889|date=2007|bibcode=2007AN....328..889K|doi=10.1002/asna.200710776|arxiv=0705.0878}}
4. ^{{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}}
5. ^{{cite journal|bibcode=2011A&A...530A.138C|doi=10.1051/0004-6361/201016276|title=New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey|journal=Astronomy & Astrophysics|volume=530|pages=A138|author1=Casagrande|first1=L.|last2=Schönrich|first2=R.|last3=Asplund|first3=M.|last4=Cassisi|first4=S.|last5=Ramírez|first5=I.|last6=Meléndez|first6=J.|last7=Bensby|first7=T.|last8=Feltzing|first8=S.|author8-link= Sofia Feltzing |year=2011|arxiv = 1103.4651 }}
6. ^{{cite journal|bibcode=2009A&A...501..941H|doi=10.1051/0004-6361/200811191|arxiv=0811.3982|title=The Geneva-Copenhagen survey of the solar neighbourhood|journal=Astronomy & Astrophysics|volume=501|issue=3|pages=941|year=2009|last1=Holmberg|first1=J.|last2=Nordström|first2=B.|last3=Andersen|first3=J.}}
7. ^{{cite journal|bibcode=2004MNRAS.349..757L|arxiv=astro-ph/0401259|doi=10.1111/j.1365-2966.2004.07557.x|title=Lithium abundances of the local thin disc stars|journal=Monthly Notices of the Royal Astronomical Society|volume=349|issue=2|pages=757|year=2004|last1=Lambert|first1=David L.|last2=Reddy|first2=Bacham E.}}
8. ^{{cite journal|bibcode=2016AJ....151...59C|doi=10.3847/0004-6256/151/3/59|arxiv=1510.05666|title=The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars|journal=The Astronomical Journal|volume=151|issue=3|pages=59|year=2016|last1=Chandler|first1=Colin Orion|last2=McDonald|first2=Iain|last3=Kane|first3=Stephen R.}}
9. ^{{cite journal|bibcode=1990ApJ...354..310B|doi=10.1086/168691|title=Lithium depletion and rotation in main-sequence stars|journal=The Astrophysical Journal|volume=354|pages=310|year=1990|last1=Balachandran|first1=Suchitra}}
[1][2][3][4][5][6][7][8][9]
}}{{Stars of Chamaeleon}}{{giant-star-stub}}

7 : Chamaeleon (constellation)|Bayer objects|F-type giants|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects

随便看

 

开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。

 

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间:2024/11/17 16:10:24