imported>Jimmy-bot：机器人: 尚未清空的已重定向分类（Cat:K-型巨星→Cat:K型巨星）

2024-06-25T08:51:47Z

机器人: 尚未清空的已重定向分类（Cat:K-型巨星→Cat:K型巨星）

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{{Starbox begin
| name = HD 47366
}}
{{Starbox observe
| epoch = J2000.0
| constell = [[大犬座]]
| ra = {{RA|06|37|40.79354}}<ref name="van Leeuwen2007"/>
| dec = {{DEC|−12|59|06.4138}}<ref name="van Leeuwen2007"/>
| appmag_v = 6.12<ref name=mnrassa27_11/>
}}
{{Starbox character
| class = K1III:<ref name=aaa480_1_91/>
| b-v = 0.977<ref name=aaa480_1_91/>
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = 9.01<ref name=aaa480_1_91/>
| prop_mo_ra = +10.32<ref name="van Leeuwen2007"/>
| prop_mo_dec = −124.46<ref name="van Leeuwen2007"/>
| parallax = 12.50
| p_error = 0.42
| parallax_footnote = <ref name="van Leeuwen2007"/>
| absmag_v = 1.459<ref name=aaa480_1_91/>
}}
{{Starbox detail
| mass = {{Val|1.81|0.13}}<ref name=sato2016/>
| radius = {{Val|7.30|0.33}}<ref name=sato2016/>
| luminosity = {{Val|26.1|1.8}}<ref name=sato2016/>
| gravity = 2.60<ref name=aaa480_1_91/>
| temperature = 4,772<ref name=aaa480_1_91/>
| metal_fe = −0.16<ref name=aaa480_1_91/>
| rotational_velocity = {{Val|4.3|0.8}}<ref name=sato2016/>
| rotation = {{nowrap|< 86<ref name=sato2016/> d}}
| age_gyr = {{Val|1.61|0.53}}<ref name=sato2016/>
}}
{{Starbox catalog
| names = [[波恩星表|BD]]−12° 1566, [[HD星表|HD]] 47366, [[依巴谷卫星|HIP]] 31674, [[亮星星表|HR]] 2437, [[SAO星表|SAO]] 151725.<ref name=SIMBAD/>
}}
{{Starbox end}}

'''HD 47366'''是一顆在天球上位於[[大犬座]]的恆星，視星等6.12<ref name=mnrassa27_11/>，接近人類肉眼可見恆星最低亮度極限。根據[[波特尔暗空分类法]]，必須在無光害的鄉村夜空才能以肉眼看到它。[[依巴谷卫星]]以[[恆星視差]]量測其距離約為{{Convert|261|ly|pc|lk=on|abbr=off}}<ref name="van Leeuwen2007"/>。

==概要==
HD 47366是一顆[[恒星光谱|光譜型]] K1III 的[[巨星]]<ref name=aaa480_1_91/>。根據光譜資料觀測，其質量大約是1.81倍[[太陽質量]]，年齡大約是16億年，因此可推測它的演化階段已經離開了[[主序星]]時期。HD 47366的半徑大約是7.3倍太陽半徑，光度是太陽的26倍，表面[[有效溫度]]4722 K。它的[[恆星自轉|投影自轉速度]]4.3 km/s，代表它的自轉周期在86日以下<ref name=sato2016/>。

==行星系統==
2016年時，一組天文學家報告在HD 47366旁發現兩顆[[巨行星]]。對HD 47366的[[徑向速度]]量測顯示恆星旁的行星重力使恆星的運動受到擾動。初步的最佳資料擬合結果顯示有兩個周期存在：一顆軌道周期約1年和另一顆軌道周期約2年的行星。這兩顆行星的預測質量都高於木星，其質量下限分別為木星的1.8和1.9倍。但直到得知這兩顆行星的[[軌道傾角]]以前人無法得知其實際質量<ref name=sato2016/>。

{{OrbitboxPlanet begin
| table_ref = <ref name=sato2016/>
}}
{{OrbitboxPlanet
| exoplanet = b
| mass = ≥ {{Val|1.75|+0.20|−0.17}}
| period = {{Val|363.3|+2.5|−2.4}}
| semimajor = {{Val|1.214|+0.030|−0.029}}
| eccentricity = {{Val|0.089|+0.079|−0.060}}
}}
{{OrbitboxPlanet
| exoplanet = c
| mass = ≥ {{Val|1.86|+0.16|−0.15}}
| period = {{Val|684.7|+5.0|−4.9}}
| semimajor = {{Val|1.853|+0.045|−0.045}}
| eccentricity = {{Val|0.278|+0.069|−0.094}}
}}
{{Orbitbox end}}

{{Clear}}
== 參考資料 ==
{{reflist|refs=

<ref name="van Leeuwen2007">{{citation
| last1=van Leeuwen | first1=F.
| title=Validation of the new Hipparcos reduction
| 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 | postscript=.
}}</ref>

<ref name=aaa480_1_91>{{citation
| display-authors=1
| last1=Soubiran | first1=C. | last2=Bienaymé | first2=O.
| last3=Mishenina | first3=T. V. | last4=Kovtyukh | first4=V. V.
| title=Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants
| journal=Astronomy and Astrophysics
| volume=480 | issue=1 | pages=91–101 |date=March 2008
| doi=10.1051/0004-6361:20078788 | bibcode=2008A&A...480...91S
| arxiv=0712.1370 | postscript=.
}}</ref>

<ref name=mnrassa27_11>{{citation
| last1=Corben | first1=P. M. | last2=Stoy | first2=R. H.
| title=Photoelectric Magnitudes and Colours for Bright Southern Stars
| journal=Monthly Notes of the Astronomical Society of Southern Africa
| volume=27 | page=11 | date=1968
| bibcode=1968MNSSA..27...11C | postscript=.
}}</ref>

<ref name=sato2016>{{citation
| display-authors=1
| first1=Bun'ei | last1=Sato | first2=Liang | last2=Wang
| first3=Yu-Juan | last3=Liu | first4=Gang | last4=Zhao
| first5=Masashi | last5=Omiya | first6=Hiroki | last6=Harakawa
| first7=Makiko | last7=Nagasawa | first8=Robert A. | last8=Wittenmyer
| first9=Paul | last9=Butler | first10=Nan | last10=Song
| first11=Wei | last11=He | first12=Fei | last12=Zhao
| first13=Eiji | last13=Kambe | first14=Kunio | last14=Noguchi
| first15=Hiroyasu | last15=Ando | first16=Hideyuki | last16=Izumiura
| first17=Norio | last17=Okada | first18=Michitoshi | last18=Yoshida
| first19=Yoichi | last19=Takeda | first20=Yoichi | last20=Itoh
| first21=Eiichiro | last21=Kokubo | first22=Shigeru | last22=Ida
| title=A Pair of Giant Planets around the Evolved Intermediate-Mass Star HD 47366: Multiple Circular Orbits or a Mutually Retrograde Configuration
| date=January 18, 2016 | arxiv=1601.04417 | postscript=.
}}</ref>

<ref name=SIMBAD>{{citation
| title=HR 2437 -- Star
| work=SIMBAD Astronomical Database
| publisher=Centre de Données astronomiques de Strasbourg
| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+47366
| accessdate=2016-01-21
| postscript=.
| archive-date=2016-01-30
| archive-url=https://web.archive.org/web/20160130025732/http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+47366
| dead-url=no
}}</ref>

}}

==外部連結==
* {{citation
| first1=Tomasz
| last1=Nowakowski
| title=Two giant planets detected around an evolved intermediate-mass star
| work=Physorg.org
| date=January 21, 2016
| url=http://phys.org/news/2016-01-giant-planets-evolved-intermediate-mass-star.html
| postscript=.
| accessdate=2016-02-18
| archive-date=2020-11-29
| archive-url=https://web.archive.org/web/20201129134233/https://phys.org/news/2016-01-giant-planets-evolved-intermediate-mass-star.html
| dead-url=no
}}

[[Category:大犬座]]
[[Category:K型巨星]]
[[Category:HD和HDE天體|47366]]
[[Category:HIP天體|31674]]
[[Category:HR天體|2437]]
[[Category:SAO天體|151725]]
[[Category:BD、CD和CP天体|BD−12° 1566]]
[[Category:行星系]]

HD 47366 - 版本历史

imported>Jimmy-bot：​机器人: 尚未清空的已重定向分类（Cat:K-型巨星→Cat:K型巨星）

imported>Jimmy-bot：机器人: 尚未清空的已重定向分类（Cat:K-型巨星→Cat:K型巨星）