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HAT-P-11b - 版本历史
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<p><b>新页面</b></p><div>{{Infobox Planet<br />
| bgcolour = #A0B0FF<br />
| image = [[File:Exoplanet Comparison HAT-P-11 b.png|300px]]<br />
| caption = HAT-P-11b(右)和[[海王星]]比较<br />
| name = HAT-P-11b<br />
| parent star = yes<br />
| star = HAT-P-11<br />
| planet = <br />
| constell = 天鹅座<br />
| distance = 123 ± 4.2光年<br />
| RA = {{RA|19|50|50.2469}}<br />
| DEC = {{DEC|+48|04|51.085}}<br />
| class = K4<br />
| discovery = yes<br />
| discovery_ref = <br />
| discoverer = Bakos ''et al.''<br />
| discovered = 2009年1月2日<br />
| discovery_method = 中天法<br />
| semimajor = 0.053{{±|0.0002|0.0008}}天文单位<br />
| semiminor = <br />
| orbital_circ = <br />
| eccentricity = 0.198 ± 0.046<br />
| period = 4.8878162 ± 0.0000071地球日<br />
| inclination = 88.5 ± 0.6°<br />
| long_periastron = 355.2 ± 17.3°<br />
| time_periastron = <br />
| semi-amp =<br />
| physical_characteristics = yes<br />
| mean_radius = 0.422 ± 0.014[[木星|''R''<sub>''J''</sub>]]<br />
| density = 1440千克/立方米<br />
| surface_grav = <br />
| mass = 0.081 ± 0.009[[木星质量|''M''<sub>''J''</sub>]]<br />
| minimum_mass =<br />
| single_temperature = <br />
| magnitude =<br />
}}<br />
<br />
'''HAT-P-11b'''是一颗环绕[[视星等]]为10等的K型恒星[[HAT-P-11]]运行的系外行星。科学家使用[[凌日法]]发现了该行星，发现结果于2009年1月2日对外公布。该行星位于[[天鹅座]]，距离地球123[[光年]]。在其发现之时，该行星是已知的最小的会产生凌星现象的系外行星，其真实质量比地球大26倍，半径比地球大4.58倍。类似于[[飞马座51b]]，该行星与其中央恒星的距离也很小，仅为0.053天文单位，这是凌星行星的典型特征。不过该行星的轨道离心率为0.198，对于[[热木星]]来说显得过高。现今HAT-P-11系统正处于[[开普勒太空望远镜]]的观测[[视场]]之内。<ref name="Bakos2010">{{cite journal | title=HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field | last1=Bakos | first1=G. Á. | last2=Torres | first2=G. | last3=Pál | first3=A. | last4=Hartman | first4= J. | last5=Kovács | first5=Géza | last6=Noyes | first6=R. W. | last7=Latham | first7=D. W. | last8=Sasselov | first8=D. D. | last9=Sipőcz | first9=B. | display-authors=1 | year=2010 | journal=The Astrophysical Journal | volume=710 | issue=2 | pages=1724–1745 | arxiv=0901.0282 | bibcode=2010ApJ...710.1724B | bibcode-access=free | doi=10.1088/0004-637X/710/2/1724 | doi-access=free }}</ref><br />
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== 参考文献 ==<br />
{{Reflist}}<br />
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== 外部链接 ==<br />
* {{cite web | url=http://media4.obspm.fr/exoplanets/base/planete.php?etoile=HAT-P-11&planete=b | title=HAT-P-11 b | work=Exoplanets | access-date=2009-06-17 | archive-url=https://www.webcitation.org/67ahZTbzE?url=http://media4.obspm.fr/exoplanets/base/planete.php?etoile=HAT-P-11 | archive-date=2012-05-11 | dead-url=yes }}<br />
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{{Sky|19|50|50.2469|+|48|04|51.085|123}}<br />
{{系外行星小作品}}<br />
<br />
[[Category:太阳系外行星]]<br />
[[Category:2009年发现的系外行星]]<br />
[[Category:类木行星]]<br />
[[Category:凌星行星]]<br />
[[Category:天鹅座]]<br />
[[Category:熱海王星]]</div>
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