Astronomy:TY Coronae Australis
From HandWiki
Short description: Star in the constellation Corona Australis
250px The y band (near infrared) light curve for TY Coronae Australis, adapted from Vaz et al. (1998)[1] | |
| Observation data 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[2] mas |
| Distance | 445 ± 9 ly (136 ± 3 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
Robert T. A. Innes announced his discovery that the star is a variable star, in 1916.[5]
References
- ↑ 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. Bibcode: 1998A&AS..130..245V.
- ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 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.
- ↑ 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. doi:10.1086/300270. Bibcode: 1998AJ....115.1617C. https://zenodo.org/record/1059055.
- ↑ Innes, R. T. A. (November 1916). "The Variable Stars and Nebulae Near R Corona Australe". Circular of the Union Observatory Johannesburg 36: 282-284. Bibcode: 1916CiUO...36..282I. https://articles.adsabs.harvard.edu/pdf/1916CiUO...36..282I. Retrieved 8 February 2025.
 |  |
