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NGC 6624

NGC 6624
球狀星團 NGC 6624。Credit : Hubble Space Telescope
觀測數據(J2000 曆元)
星座人馬座
赤經18h 23m 41s
赤緯−30° 21′ 39″
距離25.8 ± 1.1 kly(7.9 ± 0.34 kpc
視星等 (V)7.6
視直徑(V)8.8 arcminutes[1]
物理性質
金屬量-0.56 ± 0.27[2] dex

NGC 6624是一個位於人馬座球狀星團,由威廉·赫歇爾發現於1784年6月24日。該星團視星等7.6[3]

概要

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NGC 6624內已經發現6顆脈衝星,第一顆被發現的是PSR J1823-3021A。該星團內還有軌道週期只有11.5分的低质量X射线聯星 4U 1820-30。

NGC 6624在小型望遠鏡中是一個模糊的點,如果是雙筒望遠鏡則看起來像恆星。它的核心區域恆星分布相當緊密[1],在天球上的位置是在箕宿二東南方0.8度[4],距離銀心約3800光年(1170秒差距)[2]


參考資料

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  1. ^ 1.0 1.1 O'Meara, Steve. Steve O'Meara's Herschel 400 Observing Guide. Cambridge: Cambridge University Press. 2007: 236 [2014-01-28]. ISBN 978-0-521-85893-9. (原始内容存档于2014-02-03). 
  2. ^ 2.0 2.1 Sofue, Yoshiaki. The Central Regions of the Galaxy and Galaxies. Netherlands: Kluwer Academic Publishers. : 37 [2014-01-28]. ISBN 0-7923-5061-8. (原始内容存档于2014-02-03). 
  3. ^ O'Meara, Stephen James. Deep Sky Companions: Hidden Treasures. Cambridge University Press. 2007: 452 [2014-01-28]. (原始内容存档于2014-02-03). 
  4. ^ Bakich, Michael E. 1001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers. Springer. 2010: 249 [2014-01-28]. ISBN 978-1-4419-1776-8. doi:10.1007/978-1-4419-1777-5. (原始内容存档于2014-02-03). 
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NGC 6624
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