NGC 288
NGC 288是在玉夫座的一個球狀星團。約翰·路易·埃米爾·德雷耳在1888年就描述了它的在視覺上的外觀[7]。它位於星系NGC 253的東南方大約1.8°，銀南極的北北東方37'，一顆9等星南南東方15'，在西南側的恆星構成開放的半圓形[1]，使用雙筒望遠鏡就可以看見[1]。它沒有很集中，所以可以很容易分解出單獨的恆星。較密集的核心大小約3'，鬆散且不規則的外圍構成直徑大約9'的環狀[1]，週邊的成員非常鬆散的向南方擴散，特別是西南方[1]。
| NGC 288 | |
|---|---|
 | |
| 觀測數據(J2000 曆元) | |
| 分類 | X[1] |
| 星座 | 玉夫座 |
| 赤經 | 00h 52m 45.24s[2] |
| 赤緯 | –26° 34′ 57.4″[2] |
| 距離 | 28.7 kly（8.8 kpc）[3] |
| 視星等 (V) | 9.37[4] |
| 視直徑(V) | 13′.8[1] |
| 物理性質 | |
| Mass | 4.8×104[5] M☉ |
| 金屬量 | –1.14[6] dex |
| 估計年齡 | 10.62 Gyr[6] |
| 其它名稱 | Melotte 3[4] |
參考資料
編輯- ^ 1.0 1.1 1.2 1.3 1.4 1.5 Kepple, George Robert; Sanner, Glen W. The Night Sky Observer's Guide, Volume 2. Willmann-Bell, Inc. 1998: 365, 372. ISBN 0-943396-60-3.
- ^ 2.0 2.1 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, arXiv:1008.2755
, doi:10.1088/0004-6256/140/6/1830.
- ^ Paust, Nathaniel E. Q.; et al, The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions, The Astronomical Journal, February 2010, 139 (2): 476–491, Bibcode:2010AJ....139..476P, doi:10.1088/0004-6256/139/2/476
- ^ 4.0 4.1 SIMBAD Astronomical Database. Results for extended name search on NGC 288. [2007-02-10].
- ^ Marks, Michael; Kroupa, Pavel, Initial conditions for globular clusters and assembly of the old globular cluster population of the Milky Way, Monthly Notices of the Royal Astronomical Society, August 2010, 406 (3): 2000–2012, Bibcode:2010MNRAS.406.2000M, arXiv:1004.2255 , doi:10.1111/j.1365-2966.2010.16813.x. Mass is from MPD on Table 1.
- ^ 6.0 6.1 Forbes, Duncan A.; Bridges, Terry, Accreted versus in situ Milky Way globular clusters, Monthly Notices of the Royal Astronomical Society, May 2010, 404 (3): 1203–1214, Bibcode:2010MNRAS.404.1203F, arXiv:1001.4289 , doi:10.1111/j.1365-2966.2010.16373.x.
- ^ Dreyer, J. L. E. A New General Catalogue of Nebulae and Clusters of Stars,being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged.. Memoirs of the Royal Astronomical Society. 1888, 49: 1–237. Bibcode:1888MmRAS..49....1D.
外部連結
編輯