NGC 6584
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 | |
|---|---|
 | |
| 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] |
參考資料
- ^ 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.
- ^ 2.0 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）.
- ^ 3.0 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）.
- ^ 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 .
- ^ "Physical Parameters of Galactic Globular Clusters" by S. Djorgovski
