NGC 6584是一個球狀星團,位於望遠鏡座中的天壇座θ附近,距離地球為45,000光年[2]。它是一個奧斯特霍夫I型星團,包含至少69顆變星,其中大部分是天琴座RR型變星:46顆星被確定為RRab型變星; 15顆RRc型變星、1顆RRe型變星、4顆食雙星和3顆長週期變星[4]

NGC 6584
NGC 6584 as observed by the Hubble Space Telescope.
觀測數據(J2000 曆元)
星座望遠鏡座
赤經18h 18m 37.60s[1]
赤緯–52° 12′ 56.8″[1]
距離45,000光年[2]
視直徑(V)7.9'
物理性質
金屬量−1.53+0.08
[3] dex
估計年齡11.6+1.7
Gyr[3]

NGC 6584距銀河中心約4,000秒差距,距銀河平面約2,500秒差距[5]

參考資料

  1. ^ 1.0 1.1 Goldsbury, Ryan; et al, The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters, The Astronomical Journal, December 2010, 140 (6): 1830–1837, Bibcode:2010AJ....140.1830G, S2CID 119183070, arXiv:1008.2755 , doi:10.1088/0004-6256/140/6/1830. 
  2. ^ 2.0 2.1 Streicher, Magda. A Spyglass Telescope (PDF). Deepsky Delights. August 2009, 68: 168 [29 September 2012]. Bibcode:2009MNSSA..68..168S. (原始内容 (PDF)存档于2020-04-04). 
  3. ^ 3.0 3.1 High-resolution Spectroscopic Abundances of Red Giant Branch Stars in NGC 6584 and NGC 7099. [2024-02-08]. (原始内容存档于2024-02-07). 
  4. ^ Toddy, Joseph M.; Johnson, Elliott W.; Darragh, Andrew N.; Murphy, Brian W. New Variable Stars in the Globular Cluster NGC 6584. Journal of the Southeastern Association for Research in Astronomy. 2012, 6: 63–71. Bibcode:2012JSARA...6...63T. arXiv:1205.1034 . 
  5. ^ "Physical Parameters of Galactic Globular Clusters" by S. Djorgovski

外部連結