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左更五

左更五(白羊座π)
π Arietis
观测资料
历元 J2000
星座 白羊座
星官 娄宿 左更
赤经 02h 49m 17.5599s
赤纬 +17° 27′ 51.512″
视星等(V) 5.314
特性
光谱分类B6V
U−B 色指数-0.47
B−V 色指数-0.06
天体测定
径向速度 (Rv)8.8 km/s
自行 (μ) 赤经:3.65 mas/yr
赤纬:-14.61 mas/yr
视差 (π)5.41 ± 1.06 mas
距离approx. 600 ly
(approx. 180 pc)
绝对星等 (MV)5.226
详细资料
质量18 M
半径7 R
亮度20,000 L
温度10,000–30,000 K
其他命名
42 Arietis, HR 836, HD 17543, BD+16°355, HIP 13165, SAO 93127.
参考数据库
SIMBAD资料
参考数据库
SIMBAD资料

左更五,即白羊座π(π Ari, π Arietis),是一个位于白羊座恒星系统,,它距离地球约603光年

左更五包括一个光谱联星系统以及两颗伴星。这个光谱联星系统被分类为B-型主序星视星等为+5.26。第一颗伴星是一颗白色A-型主序星,距离联星系统3.2角秒,视星等为8.8。第二颗伴星是一颗黄白色F-型主序星,距离联星系统25.2角秒,视星等为10.9。

白羊座π在中国星官系统中属于西方白虎七宿娄宿的星官左更第五星,因此被称为左更五[1] [2]。在西方和白羊座δ白羊座ε白羊座ζ白羊座ρ3一起并称为Al Botein,来自于阿拉伯语بطين,意思为“腹部”[3]

参考资料

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  1. ^ 香港太空馆 - 研究资源 - 亮星中英对照表 互联网档案馆存档,存档日期2010-08-11., Hong Kong Space Museum. Accessed on line November 23, 2010.
  2. ^ 中国星座神话, written by 陈久金. Published by 台湾书房出版有限公司, 2005, ISBN 9789867332257.
  3. ^ Allen, R. H. Star Names: Their Lore and Meaning Reprint. New York, NY: Dover Publications Inc. 1963: 83 [2010-12-12]. ISBN 0486210790. 

外部链接

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左更五
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