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Globular cluster in the constellation Telescopium From Wikipedia, the free encyclopedia
NGC 6584 is a globular cluster in the constellation Telescopium that lies near Theta Arae and is 45000 light-years distant.[2] It is an Oosterhoff type I cluster, and contains at least 69 variable stars, most of which are RR Lyrae variables: 46 stars were identified as RRab variables; 15 as RRc variables, 1 RRe variable, 4 eclipsing binaries and 3 long period variables.[4] NGC 6584 is about 4 kpc from the Galactic Center and about 2.7 kpc from the Galactic plane.[5]
| NGC 6584 | |
|---|---|
| |
| Observation data (J2000 epoch) | |
| Class | VIII |
| Constellation | Telescopium |
| Right ascension | 18h 18m 37.60s[1] |
| Declination | –52° 12′ 56.8″[1] |
| Distance | 45000[2] |
| Apparent dimensions (V) | 7.9' |
| Physical characteristics | |
| Metallicity | = −1.53±0.08[3] dex |
| Estimated age | 11.6±1.7 Gyr[3] |
As is typical for metal-poor globular clusters, NGC 6584 has an enhanced concentration of alpha elements relative to iron.[3]
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