| 词条 | Theta Indi |
| 释义 |
| name = θ Indi }}{{Starbox image |image={{Location mark |image=Indus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=Theta Indi |x=552|y=466 }} |caption=Location of θ Indi (circled) }}{{Starbox observe | epoch = J2000 | constell = Indus | ra = {{RA|21|19|51.98955}}[1] | dec = {{DEC|-53|26|57.9315}}[1] | appmag_v = 4.40[2] }}{{Starbox character | class = A5IV-V[3] | b-v = +0.18[2] }}{{Starbox astrometry | radial_v = -14.50[4] | prop_mo_ra = +107.90[1] | prop_mo_dec = -66.41[1] | parallax = 33.02 | p_error = 0.49 | parallax_footnote = [1] | absmag_v = 1.98[5] }}{{Starbox detail | mass = 1.75[6] | radius = 1.61[7] | temperature = 8,332[6] | luminosity = 12.95[8] | rotational_velocity = 135[7] | age_myr = {{Val|150|100}}[7] }}{{Starbox catalog | names = CPD−53° 10037, GC 29819, HIP 105319, HR 8140, HD 202730, SAO 246965, WDS J21199-5327AB [2] }}{{Starbox reference | Simbad = Theta+Indi }}{{Starbox end}}Theta Indi (θ Ind) is a binary star in the constellation Indus. Its apparent magnitude is 4.40[2] and it is approximately 98.8 light years away based on parallax.[1] The smaller companion, B, has a spectral type of G0V (yellow main-sequence) and an apparent magnitude of 7.18 at a separation of 6.71".[9] Recent observations suggest the primary is itself a binary with components Aa and Ab orbiting at 0.0617", estimated period about 1.3 years.[10][11] References1. ^1 2 3 4 5 {{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }} Vizier catalog entry {{Stars of Indus}}{{main-star-stub}}{{multi-star-stub}}2. ^1 2 3 {{cite web | title=Theta Indi | work=SIMBAD Astronomical Database | url=http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=Theta+Indi | accessdate=2016-08-23 }} 3. ^{{citation | last1=Gray | first1=R. O. | last2=Garrison | first2=R. F. | title=The late A-type stars - Refined MK classification, confrontation with Stromgren photometry, and the effects of rotation | journal=Astrophysical Journal Supplement Series | volume=70 | issue=4 | pages=623–636 |date=July 1989 | doi=10.1086/191349 | bibcode=1989ApJS...70..623G }} 4. ^{{citation | last=Wilson | first=R. E. | year=1953 | title=General Catalogue of Stellar Radial Velocities | publisher=Carnegie Institution of Washington | bibcode=1953GCRV..C......0W | lccn=54001336 }} 5. ^{{cite journal | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331–346 | date=May 2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 }} Vizier catalog entry 6. ^1 {{cite journal | title=The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146–184 | date=May 2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 }} Vizier catalog entry 7. ^1 2 {{citation | display-authors=1 | last1=Plavchan | first1=Peter | last2=Werner | first2=M. W. | last3=Chen | first3=C. H. | last4=Stapelfeldt | first4=K. R. | last5=Su | first5=K. Y. L. | last6=Stauffer | first6=J. R. | last7=Song | first7=I. | title=New Debris Disks Around Young, Low-Mass Stars Discovered with the Spitzer Space Telescope | journal=The Astrophysical Journal | volume=698 | issue=2 | pages=1068–1094 | date=June 2009 | doi=10.1088/0004-637X/698/2/1068 | bibcode=2009ApJ...698.1068P | arxiv=0904.0819 | postscript=. }} 8. ^{{cite journal|bibcode= 2012MNRAS.427..343M|title= Fundamental parameters and infrared excesses of Hipparcos stars|journal= Monthly Notices of the Royal Astronomical Society|volume= 427|pages= 343|author1= McDonald|first1= I.|last2= Zijlstra|first2= A. A.|last3= Boyer|first3= M. L.|year= 2012|doi= 10.1111/j.1365-2966.2012.21873.x|arxiv = 1208.2037 }} Vizier catalog entry 9. ^{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | arxiv = 0806.2878 }} Vizier catalog entry 10. ^{{citation | display-authors=1 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466–3471 | date=December 2001 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 }} Vizier catalog entry 11. ^{{citation | last1=Marion | first1=L. | last2=Absil | first2=O. | last3=Ertel | first3=S. | last4=Le Bouquin| first4=J.-B. | last5=Defrère | first5=D. | title=Unveiling new stellar companions from the PIONIER exozodi survey | journal=Proceedings of the SPIE | volume=9146 | date=July 2014 | bibcode=2014SPIE.9146E..1KM | doi=10.1117/12.2057823 | arxiv=1410.5714 }} 8 : Indus (constellation)|A-type main-sequence stars|Triple star systems|Bayer objects|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。