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TY Coronae Australis (abbreviated as TY CrA), is a young star system around 3 million years old in the constellation Corona Australis. It is composed of a blue-white B-class star around triple the Sun's mass and a cooler smaller companion around half its mass (or 1.6 times that of the Sun). The system is an eclipsing binary with a period of 2.8 days.[4]

TY Coronae Australis

The y band (near infrared) light curve for TY Coronae Australis, adapted from Vaz et al. (1998)[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Australis
Right ascension 19h 01m 40.83122s[2]
Declination −36° 52′ 33.8018″[2]
Apparent magnitude (V) 9.39[3]
Characteristics
Spectral type B9e
Astrometry
Proper motion (μ) RA: −2.147 ± 0.239[2] mas/yr
Dec.: −32.723 ± 0.226[2] mas/yr
Parallax (π)7.3290 ± 0.1456 mas[2]
Distance445 ± 9 ly
(136 ± 3 pc)
Details
Other designations
TY CrA, SAO 210829, CD−37° 13024
Database references
SIMBADdata

References


  1. Vaz, L. P. R.; Andersen, J.; Casey, B. W.; Clausen, J. V.; Mathieu, R. D.; Heyer, I. (June 1998). "Four-colour photometry of eclipsing binaries XXXIX. Light curves of the pre–main sequence triple system TY Coronae Australis?". Astronomy and Astrophysics Supplement Series. 130: 245–250. doi:10.1051/aas:1998224.
  2. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  4. Casey, Brian W.; Mathieu, Robert D.; Vaz, Luiz Paulo R.; Andersen, Johannes; Suntzeff, Nicholas B. (1998). "The Pre-Main-Sequence Eclipsing Binary TY Coronae Australis: Precise Stellar Dimensions and Tests of Evolutionary Models". The Astronomical Journal. 115 (4): 1617–1633. Bibcode:1998AJ....115.1617C. doi:10.1086/300270.


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