Astronomy:TY Coronae Borealis
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Short description: Variable white dwarf star in the constellation Corona Borealis
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Corona Borealis |
| Right ascension | 16h 01m 23.187s[2] |
| Declination | +36° 48′ 34.29″[2] |
| Apparent magnitude (V) | 14.53[3] |
| Characteristics | |
| Evolutionary stage | White dwarf |
| Spectral type | DA4.4[4] |
| Astrometry | |
| Proper motion (μ) | RA: 101.113[2] mas/yr Dec.: −545.353[2] mas/yr |
| Parallax (π) | 30.4668 ± 0.0187[2] mas |
| Distance | 107.05 ± 0.07 ly (32.82 ± 0.02 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
TY Coronae Borealis, also known as Ross 808, is a variable white dwarf star of the DAV (or ZZ Ceti) type in the constellation Corona Borealis. It has a surface temperature of 11,213 ± 130 K and a mass around 70% times that of the Sun, but only 1.1% of its diameter.[5] It is 107 light-years distant from Earth.[2] It was confirmed as a variable star in 1976.[6]
References
- ↑ Bognár, Zs.; Paparó, M.; Sódor, Á.; Jenei, D. I.; Kalup, Cs.; Bertone, E.; Chavez-Dagostino, M.; Montgomery, M. H. et al. (January 2019). "Wandering near the red edge: photometric observations of three cool ZZ Ceti stars". Monthly Notices of the Royal Astronomical Society 482 (3): 4018–4031. doi:10.1093/mnras/sty2884. Bibcode: 2019MNRAS.482.4018B.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ Watson, Christopher (4 January 2010). "TY Coronae Borealis". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=10631. Retrieved 23 November 2014.
- ↑ 4.0 4.1 "TY CrB". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TY+CrB.
- ↑ Romero, A. D.; Córsico, A. H.; Althaus, L. G.; Kepler, S. O.; Castanheira, B. G.; Miller Bertolami, M. M. (2012). "Toward ensemble asteroseismology of ZZ Ceti stars with fully evolutionary models". Monthly Notices of the Royal Astronomical Society 420 (2): 1462–80. doi:10.1111/j.1365-2966.2011.20134.x. Bibcode: 2012MNRAS.420.1462R.
- ↑ McGraw, John T.; Robinson, Edward L. (1976). "High-speed photometry of luminosity-variable DA dwarfs: R808, GD 99, and G 117-B15A". Astrophysical Journal Letters 205: L155-58. doi:10.1086/182112. Bibcode: 1976ApJ...205L.155M.
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