- Source: NGC 6087
- Daftar gugus terbuka
- Daftar objek NGC
- Daftar bintang di rasi bintang Norma
- New General Catalogue
- Arp 272
- Daftar objek NGC 6001 - 7000
- Daftar eksoplanet
- Daftar bintang di rasi bintang Andromeda
- NGC 6087
- Caldwell catalogue
- List of NGC objects (6001–7000)
- C89
- Mz 3
- Norma (constellation)
- New General Catalogue
- NGC 6383
- NGC 6530
- NGC 6240
NGC 6087 (also known as Caldwell 89 or the S Normae Cluster) is an open cluster of 40 or more stars centered on the Cepheid variable S Normae in the constellation Norma. At a distance of about 3500 ly and covering a field of almost one quarter of a degree, the stars range from seventh- to eleventh-magnitude, the brightest being 6.5 magnitude S Normae. The aggregate visual magnitude of the cluster is about 5.4.
Spectral analysis of the radial motion of the stars confirm that S Normae is a member of the cluster, and the period/luminosity relationship of Cepheid variables allows the distance to be determined with confidence.
References
External links
Media related to NGC 6087 at Wikimedia Commons
NGC 6087 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
