Messier 69
| Messier 69 | |
|---|---|
| Data pengamatan (J2000 epos) | |
| Kelas | V[1] |
| Rasi bintang | Sagittarius |
| Asensio rekta | 18j 31m 23.10d[2] |
| Deklinasi | −32° 20′ 53.1″[2] |
| Jarak | 29.7 ribu tc |
| Magnitudo tampak (V) | +8.31[3] |
| Dimensi tampak (V) | 9′.8 |
| Karakteristik fisik | |
| Radius | 42 tc[4] |
| Metalisitas | = –0.78[5] dex |
| Perkiraan umur | 13.06 Miliar tahun[5] |
| Nama lain | M69, NGC 6637, GCl 96[3] |
Messier 69 (dikenal juga sebagai M69 atau NGC 6637) adalah gugus bola di rasi bintang Sagittarius. Objek ini ditemukan oleh Charles Messier pada 31 Agustus 1780, di malam yang sama saat ia menemukan M70. Pada saat itu, ia sedang mencari objek yang didiskripsikan oleh LaCaille pada tahun 1751-1752.
M69 berjarak sekitar 29.700 tahun cahaya dari bumi dan memiliki radius spasial 42 tahun cahaya.
Galeri
-
Sebagai gugus bola, M69 merupakan gugus yang paling kaya logam.[6]
Referensi
- ^ Shapley, Harlow; Sawyer, Helen B. (1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin (849): 11–14, Bibcode:1927BHarO.849...11S.
- ^ a b Goldsbury, Ryan; et al. (2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830.
- ^ a b "SIMBAD Astronomical Object Database". Results for NGC 6637. Diakses tanggal 2006-11-17.
- ^ distance × sin( diameter_angle / 2 ) = 42 ly. radius
- ^ a b Forbes, Duncan A.; Bridges, Terry (2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society, 404 (3): 1203–1214, arXiv:1001.4289, Bibcode:2010MNRAS.404.1203F, doi:10.1111/j.1365-2966.2010.16373.x.
- ^ "Cosmic riches". ESA/Hubble Picture of the Week. Diakses tanggal 3 October 2012.
Pranala luar
- Globular Cluster M69 @ SEDS Messier pages Diarsipkan 2005-12-10 di Wayback Machine.
- Messier 69, Galactic Globular Clusters Database page
- Messier 69 di WikiSky: DSS2, SDSS, GALEX, IRAS, Hidrogen α, X-Ray, Astrophoto, Peta langit, Artikel dan gambar
Wikimedia Commons memiliki media mengenai Messier 69.
Content Disclaimer
Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.
- The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
- There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
- It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
- Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
- Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.