建增八：修订间差异
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←重定向到人马座ρ#人马座ρ² |
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{{ For|具有此[[拜耳命名法|拜耳名稱]]的其它恆星系統|人馬座ρ{{!}}人馬座ρ}} |
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#REDIRECT [[人马座ρ#人马座ρ²]] |
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{{Starbox begin |
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| name = 建增八<br />人馬座ρ<sup>2</sup> |
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}} |
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{{Starbox image |
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| image = |
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<div style="position: relative">[[File:Sagittarius IAU.svg|250px|alt=Diagram showing star positions and boundaries of the Sagittarius constellation and its surroundings]] |
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<div style="position: absolute; left: 39.3%; top: 27.0%;">[[File:Cercle rouge 100%.svg|12px]]</div> |
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</div> |
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| caption=建增八的位置（紅圈） |
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}} |
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{{Starbox observe |
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| epoch = [[J2000.0]] |
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| equinox = [[J2000.0]] ([[國際天球參考系|ICRS]]) |
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| constell = [[人馬座]] |
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| ra = {{RA|19|21|50.89574}}<ref name=vanLeeuwen2007/> |
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| dec = {{DEC|−18|18|30.1996}}<ref name=vanLeeuwen2007/> |
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| appmag_v = +5.87<ref name=Corben1968/> |
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}} |
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{{Starbox character |
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| class = K0 III<ref name=houk1978/> |
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| b-v = +1.06<ref name=Corben1968/> |
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| u-b = |
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| variable = |
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}} |
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{{Starbox astrometry |
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| radial_v = {{Val|−12.7|2.9}}<ref name=Gontcharov2006/> |
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| prop_mo_ra = +102.72<ref name=vanLeeuwen2007/> |
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| prop_mo_dec = −93.20<ref name=vanLeeuwen2007/> |
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| parallax = 9.82 |
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| p_error = 0.40 |
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| parallax_footnote = <ref name=vanLeeuwen2007/> |
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| absmag_v = +0.80<ref name=Anderson2012/> |
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}} |
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{{Starbox detail |
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| source = |
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| mass = |
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| radius = |
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| luminosity = 60.4<ref name=Mcdonald2012/> |
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| temperature = 4,721<ref name=Mcdonald2012/> |
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| gravity = |
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| metal_fe = |
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| rotational_velocity = |
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| age_myr = |
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}} |
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{{Starbox catalog |
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| names = {{odlist | B=ρ<sup>2</sup> Sgr | F=45 Sgr | BD=−18° 5325 | HD=181645 | HIP=95188 | HR=7344 | SAO=162521 }}<ref name=SIMBAD/> |
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}} |
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{{Starbox reference |
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| Simbad = rho02+Sgr |
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}} |
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{{Starbox end}} |
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'''建增八'''（'''人馬座ρ<sup>2</sup>'''）是在[[黃道]][[星座]][[人馬座]]的一顆[[恆星]]，它的[[視星等]]為+5.87等<ref name=Corben1968/>，接近肉眼可以看到的恆星下限。根據從地球觀測得到9.82[[毫角秒|mas]]的年週[[恆星視差|視差]] <ref name=vanLeeuwen2007/>，它距離[[太陽]]約330[[光年]]。 |
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這是一顆[[恆星分類]]為K0III，為[[恆星演化|演化]]的[[恆星分類#K型|K型]][[巨星]]<ref name=houk1978/>。根據1997年的[[掩星#月掩星|月掩星]]觀測，在21mas的[[角距離]]處發現了一顆伴星。它似乎是一顆[[A型主序星]]，類型約為A5。這顆伴星在之前的月掩星中沒有被發現<ref name=Richichi1999/>。 |
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== 參考資料 == |
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{{reflist|refs= |
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<ref name=vanLeeuwen2007>{{citation |
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| title=Validation of the new Hipparcos reduction |
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| last1=van Leeuwen | first1=F. |
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| journal=Astronomy and Astrophysics |
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| volume=474 | issue=2 | pages=653–664 | date=2007 |
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| arxiv=0708.1752 | bibcode=2007A&A...474..653V |
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| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref> |
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<ref name=Anderson2012>{{citation |
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| title=XHIP: An extended hipparcos compilation |
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| last1=Anderson | first1=E. | last2=Francis | first2=Ch. |
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| journal=Astronomy Letters |
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| volume=38 | issue=5 | pages=331 | year=2012 |
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| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 |
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| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref> |
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<ref name=Gontcharov2006>{{citation |
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| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system |
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| last1=Gontcharov | first1=G. A. |
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| journal=Astronomy Letters |
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| volume=32 | issue=11 | pages=759–771 | date=2006 |
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| bibcode=2006AstL...32..759G | doi=10.1134/S1063773706110065 |
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| arxiv=1606.08053| s2cid=119231169 | postscript=. }}</ref> |
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<ref name=Mcdonald2012>{{citation |
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| display-authors=1 | last1=McDonald | first1=I. |
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| last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. |
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| title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars |
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| journal=Monthly Notices of the Royal Astronomical Society |
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| volume=427 | issue=1 | pages=343–57 | date=2012 |
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| bibcode=2012MNRAS.427..343M | arxiv=1208.2037 |
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| doi=10.1111/j.1365-2966.2012.21873.x | s2cid=118665352 | postscript=. }}</ref> |
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<ref name=Richichi1999>{{citation |
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| title=New binary stars discovered by lunar occultations. IV |
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| last1=Richichi | first1=A. | last2=Ragland | first2=S. |
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| last3=Calamai | first3=G. | last4=Baffa | first4=C. |
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| last5=Stecklum | first5=B. | last6=Richter | first6=S. |
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| journal=Astronomy and Astrophysics | display-authors=1 |
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| volume=350 | pages=491–496 | date=October 1999 |
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| bibcode=1999A&A...350..491R | postscript=. }}</ref> |
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<ref name=houk1978>{{citation |
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| last1=Houk | first1=Nancy | last2=Smith-Moore | first2=M. |
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| title=Michigan catalogue of two-dimensional spectral types for the HD stars |
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| volume=4 | publication-place=Ann Arbor | year=1978 |
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| publisher=Dept. of Astronomy, University of Michigan |
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| bibcode=1988mcts.book.....H | postscript=. }}</ref> |
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<ref name=Corben1968>{{citation |
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| last1=Corben | first1=P. M. | last2=Stoy | first2=R. H. |
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| title=Photoelectric Magnitudes and Colours for Bright Southern Stars |
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| journal=Monthly Notes of the Astronomical Society of Southern Africa |
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| volume=27 | page=11 | year=1968 |
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| bibcode=1968MNSSA..27...11C | postscript=. }}</ref> |
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<ref name=SIMBAD>{{cite simbad |
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| title=rho02 Sgr | access-date=2017-07-05 | postscript=. }}</ref> |
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}} |
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{{Stars of Sagittarius|state=collapsed}} |
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{{DEFAULTSORT:Rho2 Sagittarii}} |
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[[Category:K-型巨星]] |
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[[Category:雙星]] |
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[[Category:拜耳天體|人馬座, Rho]] |
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[[Category:人馬座]] |
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[[Category: BD、CD和CP天體]] |
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[[Category:佛氏天體|人馬座, 45]] |
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[[Category:HD和HDE天體|181645]] |
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[[Category:HIP天體|95188]] |
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[[Category:HR天體|7344]] |
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2023年7月4日 (二) 07:11的版本
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| 觀測資料 曆元 J2000.0 | |
|---|---|
| 星座 | 人馬座 |
| 星官 | |
| 赤經 | 19h 21m 50.89574s[1] |
| 赤緯 | −18° 18′ 30.1996″[1] |
| 視星等（V） | +5.87[2] |
| 特性 | |
| 光谱分类 | K0 III[3] |
| B−V 色指数 | +1.06[2] |
| 天体测定 | |
| 徑向速度 (Rv) | −12.7±2.9[4] km/s |
| 自行 (μ) | 赤经：+102.72[1] mas/yr 赤纬：−93.20[1] mas/yr |
| 视差 (π) | 9.82 ± 0.40[1] mas |
| 距离 | 330 ± 10 ly (102 ± 4 pc) |
| 绝对星等 (MV) | +0.80[5] |
| 詳細資料 | |
| 亮度 | 60.4[6] L☉ |
| 溫度 | 4,721[6] K |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
建增八（人馬座ρ2）是在黃道星座人馬座的一顆恆星，它的視星等為+5.87等[2]，接近肉眼可以看到的恆星下限。根據從地球觀測得到9.82mas的年週視差 [1]，它距離太陽約330光年。
這是一顆恆星分類為K0III，為演化的K型巨星[3]。根據1997年的月掩星觀測，在21mas的角距離處發現了一顆伴星。它似乎是一顆A型主序星，類型約為A5。這顆伴星在之前的月掩星中沒有被發現[8]。
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F., Validation of the new Hipparcos reduction, Astronomy and Astrophysics, 2007, 474 (2): 653–664, Bibcode:2007A&A...474..653V, S2CID 18759600, arXiv:0708.1752
, doi:10.1051/0004-6361:20078357.
- ^ 2.0 2.1 2.2 Corben, P. M.; Stoy, R. H., Photoelectric Magnitudes and Colours for Bright Southern Stars, Monthly Notes of the Astronomical Society of Southern Africa, 1968, 27: 11, Bibcode:1968MNSSA..27...11C.
- ^ 3.0 3.1 Houk, Nancy; Smith-Moore, M., Michigan catalogue of two-dimensional spectral types for the HD stars 4, Ann Arbor: Dept. of Astronomy, University of Michigan, 1978, Bibcode:1988mcts.book.....H.
- ^ Gontcharov, G. A., Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system, Astronomy Letters, 2006, 32 (11): 759–771, Bibcode:2006AstL...32..759G, S2CID 119231169, arXiv:1606.08053 , doi:10.1134/S1063773706110065.
- ^ Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 , doi:10.1134/S1063773712050015.
- ^ 6.0 6.1 McDonald, I.; et al, Fundamental Parameters and Infrared Excesses of Hipparcos Stars, Monthly Notices of the Royal Astronomical Society, 2012, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, S2CID 118665352, arXiv:1208.2037 , doi:10.1111/j.1365-2966.2012.21873.x.
- ^ rho02 Sgr. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ Richichi, A.; et al, New binary stars discovered by lunar occultations. IV, Astronomy and Astrophysics, October 1999, 350: 491–496, Bibcode:1999A&A...350..491R.