For faster navigation, this Iframe is preloading the Wikiwand page for HD 154345.

HD 154345

HD 154345
观测资料
历元 J2000.0
星座 武仙座
星官
赤经 17h 02m 36.40s
赤纬 +47° 04′ 54.77″
视星等(V) +6.74
特性
光谱分类G8V
U−B 色指数0.27
B−V 色指数0.73
变星类型none
天体测定
径向速度 (Rv)-46.2 km/s
自行 (μ) 赤经:123.55 mas/yr
赤纬:854.71 mas/yr
视差 (π)55.37 ± 0.55 mas
距离58.91 ± 0.59 ly
(18.06 ± 0.18 pc)
绝对星等 (MV)+5.46
详细资料
质量0.88 M
亮度0.568 L
温度5468 ± 44 K
金属量-0.105 ± 0.03
自转27.8 ± 1.7 days[1]
年龄4.92 ± 4.48 × 109
其他命名
HD 154345, BD+47º2420, GC 23011, GCRV 9834, Gliese 651, Gl 651, GJ 651, HIP 83389, SAO 46452

HD 154345是一颗位于武仙座黄矮星,肉眼不可见,但可使用双筒望远镜观测到。

行星系统

2006年以径向速度法发现该恒星旁有一颗长周期的系外行星 HD 154345 b,相关论文于2007年5月发表[2]。根据观测结果排除了该恒星轨道内部存在质量下限大于0.3倍木星质量的行星存在。该行星系统的适居带中心在0.754天文单位[3]。假设该系统的方位是和地球观测者视线垂直(倾斜角约90°,所以真实质量大约相同于木星),该行星就不会更接近系统的适居带扰乱系统中可能存在的类地球行星轨道。

HD 154345的行星系[4]
成员
(依恒星距离)
质量 半长轴
(AU)
轨道周期
()
离心率 倾角 半径
b >0.947 ± 0.090 MJ 4.19 ± 0.26 9.15 ± 0.26 0.044 ± 0.046

参考资料

  1. ^ Simpson, E. K.; et al, Rotation periods of exoplanet host stars, Monthly Notices of the Royal Astronomical Society, November 2010, 408 (3): 1666–1679, Bibcode:2010MNRAS.408.1666S, doi:10.1111/j.1365-2966.2010.17230.x 
  2. ^ Wright, J. T.; et al. Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars. The Astrophysical Journal. 2007, 657 (1): 533–545 [2012-07-17]. Bibcode:2007ApJ...657..533W. arXiv:astro-ph/0611658可免费查阅. doi:10.1086/510553. (原始内容存档于2012-02-16). 
  3. ^ 以恒星光度的平方根计算
  4. ^ Wright, J. T.; et al. The Jupiter Twin HD 154345b. The Astrophysical Journal Letters. 2008, 683 (1): L63–L66. Bibcode:2008ApJ...683L..63W. arXiv:0802.1731可免费查阅. doi:10.1086/587461. 

外部链接


{{bottomLinkPreText}} {{bottomLinkText}}
HD 154345
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?