NGC 6584 is a
globular cluster in the constellation
Telescopium that lies near
Theta Arae and is 45000 light-years distant.
It is an
Oosterhoff type I
A globular cluster is a spheroidal conglomeration of stars. wikt:globular, Globular clusters are bound together by gravity, with a higher concentration of stars towards their centers. They can contain anywhere from tens of thousands to many mil ...
cluster, and contains at least 69 variable stars, most of which are
RR Lyrae variable
RR Lyrae variables are periodic variable stars, commonly found in globular clusters. They are used as standard candles to measure (extra) galactic distances, assisting with the cosmic distance ladder. This class is named after the prototype and ...
s: 46 stars were identified as RRab variables; 15 as RRc variables, 1 RRe variable, 4 eclipsing binaries and 3 long period variables.
NGC 6584 is about 4 kpc from the
Galactic Center and about 2.7 kpc from the Galactic plane.
["Physical Parameters of Galactic Globular Clusters" by S. Djorgovski]
As is typical for metal-poor globular clusters, NGC 6584 has an enhanced concentration of
alpha elements
Alpha (uppercase , lowercase ; grc, ἄλφα, ''álpha'', or ell, άλφα, álfa) is the first Letter (alphabet), letter of the Greek alphabet. In the system of Greek numerals, it has a value of one. Alpha is derived from the Phoenician al ...
relative to iron.
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References
External links
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Globular clusters
6584
{{Star-cluster-stub