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HD 156668 b - 版本历史
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<p><b>新页面</b></p><div>{{Infobox Planet<br />
| bgcolour = #A0B0FF<br />
| image = <br />
| caption = <br />
| name = HD 156668 b<br />
| parent star = yes<br />
| star = HD 156668<br />
| planet = <br />
| constell = 武仙座<br />
| distance = 78.5 ± 2.0光年<br />
| ra = {{RA|17|17|40}}<br />
| dec = {{DEC|+29|13|38}}<br />
| class = K2V<br />
| discovery = yes<br />
| discovery_ref = <br />
| discoverer = Howard ''et al.''<br />
| discovered = 2010年1月7日<br />
| discovery_method = 多普勒[[视向速度]]<br />
| semimajor = 0.05[[天文单位]]<br />
| semiminor = <br />
| orbital_circ = <br />
| eccentricity = 0<br />
| period = ~4.6455地球日<br />
| inclination = <br />
| long_periastron = <br />
| time_periastron = <br />
| semi-amp =1.89<br />
| physical_characteristics = yes<br />
| mean_radius = <br />
| density = <br />
| surface_grav = <br />
| mass =<br />
| minimum_mass = 4.15[[地球质量|''M''<sub>''E''</sub>]]<br />
| single_temperature = <br />
| magnitude =<br />
}}<br />
'''HD 156668 b'''是环绕恒星[[HD 156668]]公转的[[太阳系外行星]]，于2010年1月7日公布，是2010年发现的第8颗系外行星。它位于[[武仙座]]，距离地球约78.5[[光年]]。<br />
<br />
它的质量下限是地球的4.15倍，在发现的时候是利用多普勒[[视向速度]]测量法发现的第二小系外行星，仅大于2009年发现的[[格利泽581e]]<ref name="keck">{{cite web |url=http://keckobservatory.org/index.php/news/second_smallest_exoplanet_to_date_discovered_at_keck/ |title=Second Smallest Exoplanet Found To Date At Keck |author= |date=2010-01-07 |work= |publisher=W.M. Keck Observatory |accessdate=2010-01-07 |deadurl=yes |archiveurl=https://web.archive.org/web/20100111082231/http://keckobservatory.org/index.php/news/second_smallest_exoplanet_to_date_discovered_at_keck/ |archivedate=2010-01-11 }}</ref>。<br />
<br />
== 参考资料 ==<br />
{{reflist}}<br />
<br />
[[Category:太阳系外行星]]<br />
[[Category:2010年发现的系外行星]]<br />
[[Category:武仙座]]<br />
[[Category:超级地球]]</div>
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