Coronet Cluster
Star in the constellation Corona Australis
From Wikipedia, the free encyclopedia
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.
| 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 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 | |
| Mass | unknown M☉ |
| Radius | 2.1 light years |
| Estimated age | 0.5–2 million years |
| relative scarcity of circumstellar discs | |
| Other designations | R CRA, G359.93-17.85 by BDB2003 catalog |
| Associations | |
| Constellation | Corona Australis |
