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亢池四


18 Boötis

观测资料
历元 J2000
星座 牧夫座
星官 亢池氐宿
赤经 14h 19m 16.2803s
赤纬 +13° 00′ 15.476″
视星等(V) 5.4
特性
光谱分类F5IV
U−B 色指数-0.03
B−V 色指数0.38
R−I 色指数0.19
天体测定
径向速度 (Rv)-3 km/s
自行 (μ) 赤经:105.91 mas/yr
赤纬:-32.22 mas/yr
视差 (π)38.33 ± 0.81 mas
距离85 ± 2 ly
(26.1 ± 0.6 pc)
绝对星等 (MV)5.764
详细资料
质量1,7 M
半径1,4 R
亮度6 L
温度6,000–7,500 K
自转39 km/s
0,00498246877938 Year
轨道
伴星CCDM 14192+1300 B
BUP
ENG 51
半长轴 (a)156.4"
倾斜角 (i)217°
其他命名
GCRV 8373, IRAS F14168+1314, SAO 100975, AG+13° 1387, JP11 2499, BD+13° 2782, GJ 3841, 2MASS J14191627+1300155, TD1 17398, CCDM J14192+1300, GSC 00915-01442, N30 3247, TYC 915-1442-1, CSI+13 2782 1, HD 125451, PMC 90-93 961, UBV M 20120, 2E 1416.8+1313, HIC 69989, PPM Star Catalogue 130492, UBV 12580, 2E 3242, HIP 69989, RBS 1371, uvby98 100125451, FK5 1372, HR 5365, ROT 2057, YZ 13 5083, GAT 343, IDS 14145+1328, RX J1419.2+1300, GC 19319, IRAS 14168+1314, 1RXS J141916.7+130021.
参考数据库
SIMBAD资料
资料来源:
依巴谷星表CCDM (2002)、亮星星表

牧夫座18是一颗位于牧夫座恒星,中文名亢池四,约离地球85光年。其视星等为5.40,绝对星等为3.3。

牧夫座18是一颗光谱型为F5IV的白色次巨星,其光度及半径分别为太阳的4和1.6倍。

牧夫座18被认为属于大熊座移动星群的外围恒星之一。

参考资料


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亢池四
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