imported>Jimmy-bot：机器人: 尚未清空的已重定向分类（Cat:黃矮星→Cat:G型主序星）

2024-06-25T11:31:06Z

机器人: 尚未清空的已重定向分类（Cat:黃矮星→Cat:G型主序星）

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{{Starbox begin
| name = [[HD星表|HD]] 154857 }}
{{Starbox observe
| epoch = J2000
| ra = {{RA|17|11|15.72}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|-56|40|50.9}}<ref name="van Leeuwen2007"/>
| appmag_v = 7.25
| constell = [[天壇座]]
}}
{{Starbox character
| class = G5V
| r-i =
| v-r =
| b-v = 0.699 ± 0.001
| u-b =
| variable=
}}
{{Starbox astrometry
| radial_v = 27.9 ± 0.2
| prop_mo_ra = 87.14 ± 0.56<ref name="van Leeuwen2007"/>
| prop_mo_dec = -55.92 ± 0.46<ref name="van Leeuwen2007"/>
| parallax = 15.57
| p_error = 0.71
| parallax_footnote = <ref name="van Leeuwen2007"/>
| absmag_v = 7.9
}}
{{Starbox detail|
mass=1.17 (± 0.05) |
radius=2.42 |
luminosity=4.61 |
temperature=5445 |
metal=-0.23 (± 0.03) % |
rotation= |
gravity=5,579844548 [[G力|g]] |
age=8.98 G }}
|- bgcolor="#FFFAFA"
| '''Equatorial [''' [[G力|g]] ''']''' || 54,7 [[米每二次方秒|m/s<sup>2</sup>]]

{{Starbox catalog |
names=[[博斯星表|GC]] 23146, [[PPM Star Catalogue|PPM]] 345752, [[依巴谷卫星|TYC]] 8735-1682-1, [[波恩星表|CD]]-56° 6717, [[導引星表|GSC]] 08735-01682, [[SAO星表|SAO]] 244491, [[uvby98]] 100154857, [[好望角照相星表|CPC]] 20 5475, [[波恩星表|CPD]]-56° 8059, [[依巴谷卫星|HIP]] 84069, [[SPOCS]] 742. }}
{{Starbox reference |
Simbad=HD+154857
| ARICNS = }}
{{starbox sources|HIP|CCDM|HR}}
{{Starbox end}}

'''HD 154857'''是一顆距離地球約209光年的[[黃矮星]]<ref name="van Leeuwen2007"/>，位於[[天壇座]]。

==行星系統==
在HD 154857周圍已經有二顆已確認的[[太陽系外行星]]存在，分別發現於2004<ref name="McCarthy2004"/>和2007年<ref name="O'Toole2007"/>。已確認行星[[HD 154857 b]]的質量超過[[木星]]的1.8倍。該行星和母恆星的距離比日地距離遠20%，軌道週期409日，[[軌道離心率]]47%。另一顆並未立即確認的行星[[HD 154857 c]]則於2014年1月獲得確認<ref name="Wittenmyer">[http://arxiv.org/abs/1401.5525 The Anglo-Australian Planet Search. XXIII. Two New Jupiter Analogs] {{Wayback|url=http://arxiv.org/abs/1401.5525 |date=20200225210201 }}: Robert A. Wittenmyer, Jonathan Horner, C.G. Tinney, R.P. Butler, H.R.A. Jones, Mikko Tuomi, G.S. Salter, B.D. Carter, F. Elliott Koch, S.J. O'Toole, J. Bailey, D. Wright</ref>。

{{OrbitboxPlanet begin
| table_ref = <ref name="O'Toole2007"/><ref name="Wittenmyer" />
}}
{{OrbitboxPlanet
| exoplanet = [[HD 154857 b|b]]
| mass = >2.24±0.05
| period = 408 ± 0.5
| semimajor = 1.291±0.008
| eccentricity = 0.46 ± 0.02
}}
{{OrbitboxPlanet
| exoplanet = [[HD 154857 c|c]]
| mass = ≥2.6
| period = ~3470
| semimajor = 5.36
| eccentricity = 0.06
}}
{{Orbitbox end}}

==參見==
* [[確定存在的太陽系外行星列表]]

==參考資料==
{{Reflist|colwidth=30em|refs=

<ref name="McCarthy2004">{{cite journal | url=http://iopscience.iop.org/0004-637X/617/1/575/fulltext/ | title=Multiple Companions to HD 154857 and HD 160691 | last1=McCarthy | first1=Chris | last2=Butler | first2=R. Paul | last3=Tinney | first3=C. G. | last4=Jones | first4=Hugh R. A. | last5=Marcy | first5=Geoffrey W. | last6=Carter | first6=Brad | last7=Penny | first7=Alan J. | last8=Fischer | first8=Debra A. | display-authors=1 | journal=The Astrophysical Journal | volume=617 | issue=1 | pages=575–579 | year=2004 | arxiv=astro-ph/0409335 | bibcode=2004ApJ...617..575M | doi=10.1086/425214 }}</ref>

<ref name="O'Toole2007">{{cite journal | url=http://www.iop.org/EJ/article/0004-637X/660/2/1636/70956.html | title=New Planets around Three G Dwarfs | last1=O'Toole | first1=Simon J. | last2=Butler | first2=R. Paul | last3=Tinney | first3=C. G. | last4=Jones | first4=Hugh R. A. | last5=Marcy | first5=Geoffrey W. | last6=Carter | first6=Brad | last7=McCarthy | first7=Chris | last8=Bailey | first8=Jeremy | last9=Penny | first9=Alan J. | display-authors=1 | journal=The Astrophysical Journal | volume=660 | issue=2 | pages=1636–1641 | year=2007 | arxiv=astro-ph/0702213 | bibcode=2007ApJ...660.1636O | doi=10.1086/513563 | access-date=2014-01-27 | archive-date=2020-01-03 | archive-url=https://web.archive.org/web/20200103235406/http://www.iop.org/EJ/article/0004-637X/660/2/1636/70956.html | dead-url=no }}</ref>

<ref name="van Leeuwen2007">{{cite journal |url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL |title=Validation of the new Hipparcos reduction |last1=van Leeuwen |first1=F. |journal=Astronomy and Astrophysics |volume=474 |issue=2 |pages=653–664 |year=2007 |arxiv=0708.1752 |bibcode=2007A&A...474..653V |doi=10.1051/0004-6361:20078357 |deadurl=yes |archiveurl=https://web.archive.org/web/20160402233353/http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A&A...474..653VFUL |archivedate=2016-04-02 |access-date=2014-01-27 }} [http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=83792 Vizier catalog entry ] {{Wayback|url=http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I%2F311%2Fhip2&recno=83792 |date=20141229092122 }}</ref>

}}

==外部連結==
* {{cite web|url=http://exoplanet.eu/star.php?st=HD+154857|title=HD 154857|work=The Extrasolar Planets Encyclopaedia|accessdate=2008-07-21|archive-date=2012-05-16|archive-url=https://web.archive.org/web/20120516091802/http://exoplanet.eu/star.php?st=HD+154857}}
* {{cite web |url=http://www.extrasolar.net/planettour.asp?StarCatId=normal&StarId=226 |title=HD 154857 |work=Extrasolar Visions |accessdate=2008-07-21 |deadurl=yes |archiveurl=https://web.archive.org/web/20110605064516/http://www.extrasolar.net/planettour.asp?StarCatId=normal&StarId=226 |archivedate=2011-06-05 }}
* [https://web.archive.org/web/20080916061358/http://planetquest.jpl.nasa.gov/atlas/atlas_profile.cfm?Planet=261 http://planetquest.jpl.nasa.gov]

{{Sky|17|11|15.7219|-|56|40|50.865|223.55}}

{{Stars of Ara}}

[[Category:天坛座]]
[[Category:G型主序星]]
[[Category:HD和HDE天體|154857]]
[[Category:HIP天體|84069]]
[[Category:SAO天體|244491]]
[[Category:行星系]]

HD 154857 - 版本历史

imported>Jimmy-bot：​机器人: 尚未清空的已重定向分类（Cat:黃矮星→Cat:G型主序星）

imported>Jimmy-bot：机器人: 尚未清空的已重定向分类（Cat:黃矮星→Cat:G型主序星）