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南三角座ζ

Zeta Trianguli Australis
觀測資料
曆元 J2000
星座 南三角座
星官
赤經 16h 28m 28.1s
赤緯 -70° 05′ 04″
視星等(V) 4.90
特性
光谱分类F9 V (F6V + G1V)
U−B 色指数0.03
B−V 色指数0.54
变星类型?
天体测定
徑向速度 (Rv)+7.6 km/s
自行 (μ) 赤经:199.88 mas/yr
赤纬:110.77 mas/yr
视差 (π)82.87 ± 0.57 mas
距离39.4 ± 0.3 ly
(12.07 ± 0.08 pc)
绝对星等 (MV)4.49
其他命名
Gl 624, HR 6098, CD -69°2558, HD 147584, LTT 6558, GCTP 3719.00, SAO 253554, FK5 610, GC 22089, HIP 80686.

南三角座ζ(ζ TrA)是位于南三角座雙星系統,約距離地球39.5光年

此雙星系統由兩顆主序星組成,一顆為黃白色的F型矮星,另一顆為黃色的G型矮星。兩顆星的結合光譜型為F9V,結合視星等為+4.90。它們互相圍繞著對方公轉,周期為13天,軌道離心率為0.014。

儘管南三角座ζ在夜空中的位置在70° S,它依然屬於大熊座移動星群

參考資料

[编辑]
  • Jovan Skuljan, 2004, "Accurate orbital parameters for the bright southern spectroscopic binary ζ Trianguli Australis – an interesting case of a near-circular orbit", Monthly Notices of the Royal Astronomical Society, Volume 352, p. 975.
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南三角座ζ
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