S Coronae Australis

S Coronae Australis (S CrA), is a young binary star system estimated to be around 2 million years old located in the constellation Corona Australis. It is composed of a G-type main sequence star that is about as luminous as and just over twice as massive as the Sun, and a smaller K-type main sequence star that has around 50-60% of the Sun's luminosity and 1.3 times its mass. Both stars are T Tauri stars and both show evidence of having circumstellar disks. The system is around 140 parsecs distant.[1]

S Coronae Australis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Australis
Right ascension  19h 01m 08.602s
Declination −36° 57 19.95
Characteristics
Spectral type G0Ve+K0Ve
Astrometry
Radial velocity (Rv)−33 ± 5 km/s
Proper motion (μ) RA: 7.8 ± 5.8 mas/yr
Dec.: −21.9 ± 2.3 mas/yr
Details
Other designations
S CrA, S Coronae Australis, HH 82
Database references
SIMBADdata

References

  1. Carmona, A.; van den Ancker, M. E.; Henning, Th. (2007). "Optical spectroscopy of close companions to nearby Herbig Ae/Be and T Tauri stars". Astronomy and Astrophysics. 464 (2): 687–95. arXiv:astro-ph/0701208. Bibcode:2007A&A...464..687C. doi:10.1051/0004-6361:20065509.


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