S Coronae Australis

A visual band light curve for S Coronae Australis, adapted from Mundt (1979).[1] The error bar shown on the left-most point applies to all points.
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Australis
Right ascension 19h 01m 08.59709s[2]
Declination −36° 57′ 19.8950″[2]
Apparent magnitude (V) 10.91[2]
Characteristics
Spectral type G0Ve + K0Ve[3]
Variable type T Tau[3]
Astrometry
Radial velocity (Rv)−33 ± 5[4] km/s
Proper motion (μ) RA: −2.6 ± 5.8[2] mas/yr
Dec.: −9.8 ± 2.3[2] mas/yr
Distance460 ly
(140[3] pc)
Details
Other designations
S CrA, S Coronae Australis, HH 82
Database references
SIMBADdata

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.[3]

References

  1. ↑ Mundt, R. (April 1979). "Spectroscopic and photometric variations of the YY Orionis star S CrA". Astronomy & Astrophysics. 74: 21–29. Bibcode:1979A&A....74...21M. Retrieved 14 December 2021.
  2. 1 2 3 4 5 Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "The fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)". VizieR On-line Data Catalog. Bibcode:2012yCat.1322....0Z.
  3. 1 2 3 4 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. S2CID 14372262.
  4. ↑ Ralph Elmer Wilson (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W. LCCN 54001336.


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