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HD 196885

HD 196885是一个视星等6等的联星,位于海豚座。它的视差是29.15毫角秒[1],以此计算其距离地球为112光年。2004年发现一颗系外行星以周期386日环绕[2]。后续在2008年出版的论文并未确认原始行星候选者的存在,但发现另一颗周期1349日的行星存在证据[3]

另一颗恒星BD+10 4351B和HD 196885距离192角秒,并且和地球的距离与后者相同,因此这两颗恒星可能实际上是同一个恒星系统,也就是HD 196885是三星系统[4]。如果这个三星系统成立的话,两者的距离至少有6600天文单位(沿着视线方向的距离未知,所以前面的值是最小距离)。

HD 196885 A

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HD 196885 A
观测资料
历元 2000
星座 海豚座
星官 (({星官))}
赤经 20h 39m 51.8756s
赤纬 +11° 14′ 58.737″
视星等(V) 6.39
距离 112 光年
(34.3 pc)
光谱分类 F8IV
其他命名
BD+10° 4351, GC 28784, GCRV 12946, HIP 101966, HR 7907, SAO 106360, WDS 20399+1115

HD 196885 A是一个光谱类型 F6IV次巨星,最低质量是1.33倍太阳质量,半径是太阳的1.79倍[5]

行星系统

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HD 196885的行星系
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 >2.96 MJ 2.60[6] 1349 0.48 ± 0.02

HD 196885 B

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HD 196885 B
观测资料
历元 2000
星座 海豚座
星官 (({星官))}
赤经 20h 39m 51s
赤纬 +11° 14′ 58″
视星等(V) (({appmag_v))}
距离 112 光年
(34.3 pc)
光谱分类 M1V
其他命名
(({names))}

HD 196885 B是一个距离主星0.7角秒的红矮星[4],距离地球112光年,与主星距离是24天文单位[7]。沿着视线方向的距离未知,所以主星和半星距离的值是最小距离)。

参见

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参考资料

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  1. ^ van Leeuwen, F. HIP 101966. Hipparcos, the New Reduction. 2007 [2008-08-19]. (原始内容存档于2016-03-03). 
  2. ^ The Planet Around HD 196885. California & Carnegie Planet Search Team (Internet Archive link). [2008-08-19]. (原始内容存档于2004-12-27). 
  3. ^ Correia, A. C. M.; Udry, S.; Mayor, M.; Eggenberger, A.; Naef, D.; Beuzit, J.-L.; Perrier, C.; Queloz, D.; Sivan, J.-P.; Pepe, F.; Santos, N. C.; Ségransan, D. The ELODIE survey for northern extra-solar planets. IV. HD 196885, a close binary star with a 3.7-year planet. Astronomy and Astrophysics. 2008, 479 (1): 271–275. Bibcode:2008A&A...479..271C. doi:10.1051/0004-6361:20078908. 
  4. ^ 4.0 4.1 HD 196885 A page. Geneva Observatory. [2008-08-19]. (原始内容存档于2008-05-09). 
  5. ^ Schneider, J. Notes for star HD 196885. The Extrasolar Planets Encyclopaedia. [2008-08-19]. (原始内容存档于2012-03-13). 
  6. ^ Chauvin; et al. Planetary systems in close binary stars: the case of HD 196885 (abstract). Astronomy and Astrophysics. 2011, 528: A8 [2012-03-05]. Bibcode:2011A&A...528A...8C. doi:10.1051/0004-6361/201015433. (原始内容存档于2020-07-16).  (web preprint页面存档备份,存于互联网档案馆))
  7. ^ Chauvin; et al. Characterization of the long-period companions of the exoplanet host stars: HD 196885, HD 1237 and HD 27442 (abstract). Astronomy and Astrophysics. 2007, 475 (2): 723–727 [2012-03-05]. Bibcode:2007A&A...475..723C. doi:10.1051/0004-6361:20067046. (原始内容存档于2020-07-16).  (web preprint页面存档备份,存于互联网档案馆))

外部链接

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HD 196885
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