Coronet Cluster

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Coronet Cluster
Coronet Cluster in X-Ray and Infrared.jpg
The Coronet Cluster, R CrA is the central dominantly bright star, with reflection nebulae NGC 6726/NGC 6727 lit by TY CrA and HD 176386 to upper right and parts of IC 4812 at the lower right.
Observation data (J2000.0 epoch)
Right ascension 19h 1m 54s
Declination −36° 57.2′
Distance 420–550 ly (130–170 pc)
Apparent magnitude  (V)8
Apparent dimensions (V)26 arcmin
Physical characteristics
Massunknown  M☉
Radius2.1 light years
Estimated age0.5–2 million years
relative scarcity of circumstellar discs
Other designationsR CRA, G359.93-17.85 by BDB2003 catalog
Associations
Constellation Corona Australis
See also: Open cluster, List of open clusters

The Coronet Cluster, also known as the R CrA cluster after its best-known member, is a small open cluster located about 170 parsecs away in the southern constellation Corona Australis, isolated at the edge of the Gould Belt. [1] [2] It is 3.5 times closer to Earth than the Orion Nebula Cluster. [3] The cluster's center is composed of mostly young stars. [4] The variable T Coronae Australis is also a member, located just one arcminute from R CrA.

References

  1. ↑ "APOD - Coronet in the Southern Crown" . Retrieved 2016-12-30.
  2. ↑ Sicilia-Aguilar, Aurora; Henning, Thomas; Juha´sz, Attila; Bouwman, Jeroen; Garmire, Gordon; Garmire, Audrey (10 November 2008). "Very Low Mass Objects in the Coronet Cluster: The Realm of the Transition Disks" (PDF). The Astrophysical Journal. 687 (2): 1145–1167. arXiv: 0807.2504 . Bibcode:2008ApJ...687.1145S. doi:10.1086/591932. S2CID   119208696.
  3. ↑ "Coronet Cluster: A Neighbor of Star Formation (A region of star formation about 420 light years from Earth.)". Archived from the original on 17 February 2013. Retrieved 10 Jan 2013.
  4. ↑ Sicilia-Aguilar, Aurora; Henning, Thomas; Linz, Hendrik; Krause, Oliver; André, Philippe (2012). "The star formation and disk evolution history of a sparse region: The Coronet cluster". Proceedings of the Symposium "From Atoms to Pebbles: Herschel's View of Star and Planet Formation": 29. Bibcode:2012faph.confE..29S.



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