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HIP 85605

HIP 85605
观测资料
历元 J2000
星座 武仙座
星官
赤经 17h 29m 36.25s[1]
赤纬 +24° 39′ 14.12″
视星等(V) 11.03[1]
特性
光谱分类K4V
M?[2]
B−V 色指数1.1[1][2]
天体测定
径向速度 (Rv)−21[1] km/s
距离22.2? 200?[3] ly
绝对星等 (MV)11.8?[2][a]
详细资料
亮度0.001?[a] L
温度4700?[3] K
金属量贫金属?
其他命名
2MASS J17293627+2439111, TYC 2079-1800-1[1]

HIP 85605是一颗位于武仙座主序星,视星等11.03[1]。它的光谱可能是M型K型,距离太阳约18—28光年(5.6—8.5秒差距[2][3]。该恒星先前被认为是较亮恒星HIP 85607的伴星[b],不过现在认为两者是天球上距离接近的光学双星

概要

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最初依巴谷卫星于1997年对HIP 85605的视差量测值为202 mas,即距离太阳系16.1光年[1]。2007年弗罗·范·莱文将该星视差修改为147 mas,或距离太阳系22.2光年[1]。如果视差值为147 mas(0.147角秒),HIP 85605就不太可能是距离太阳最近的100颗恒星之一[4]。2014年预测,如果前述的视差与距离量测值正确的话,HIP 85605可能在未来24万至47万年后这段期间距离太阳只有0.13至0.65光年(0.04至0.2秒差距)[2]。对HIP 85605需要进行更精确的天文测量。并且该恒星如果从太阳附近近距离通过,它的重力将可能扰动奥尔特云彗星的轨道,使彗星进入内太阳系。不过HIP 85605的距离尚未精准测定[5],并且如果要更符合赫罗图,它可能距离太阳更远,且光度更高[3]

参见

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注释

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  1. ^ 1.0 1.1 基于弗罗·范·莱文量测HIP 85605的视差为147mas而得到(3.26光年/0.147角秒=22.2)
  2. ^ HIP 85607 可能是光谱型 K0III 的巨星,并且基于视差值2.72mas页面存档备份,存于互联网档案馆),HIP 85607距离太阳约1200光年。

参考资料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 HIP 85605. Strasbourg astronomical Data Center. [Jan 3, 2015]. (原始内容存档于2020-12-02). 
  2. ^ 2.0 2.1 2.2 2.3 2.4 Coryn A.L. Bailer-Jones. Close encounters of the stellar kind (PDF). Solar and Stellar Astrophysics. Dec 11, 2014 [Jan 3, 2015]. arXiv:1412.3648可免费查阅. (原始内容存档 (PDF)于2020-09-18). 
  3. ^ 3.0 3.1 3.2 3.3 Mamajek, Eric. Reason to Doubt the Hipparcos Distance and the Close Flyby Scenario for the "Rogue Star" HIP 85605. 2015-01-03 [2015-01-04]. doi:10.6084/m9.figshare.1284334. (原始内容存档于2020-05-29). 
  4. ^ THE ONE HUNDRED NEAREST STAR SYSTEMS. RECONS (Research Consortium On Nearby Stars). [2015-01-12]. (原始内容存档于2020-11-09). 
  5. ^ Coryn Bailer-Jones. The closest encounter is Hip 85605. How reliable is this?. 2015-01-01 [2015-01-05]. (原始内容存档于2015-01-04). 

外部链接

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HIP 85605
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