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Coronet Cluster

Coronet Cluster
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 ascension19h 1m 54s
Declination−36° 57.2′
Distance420–550 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
ConstellationCorona 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] The Coronet Cluster is 3.5 times closer to the Earth than the Orion Nebula Cluster.[3] The cluster center is composed of mostly young stars.[4] The variable T Coronae Australis is also a member, only one arc minute 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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