TY Coronae Borealis

TY Coronae Borealis
Observational data
Epoch: J2000.0 [1]
Constellation: Corona Borealis [1]
Right ascension: 16h 01m 23.14s [1]
Declination: +36° 48′ 34.4″ [1]
Apparent magnitude: 14.53[2]


TY Coronae Borealis, also known as R 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.[3] It is around 96 light-years distant from Earth.[1] It was confirmed as a variable star in 1976.[4]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4
  2. ↑ Watson, Christopher (4 January 2010). "TY Coronae Borealis". AAVSO Website. American Association of Variable Star Observers. Retrieved 23 November 2014.
  3. ↑ 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. Bibcode:2012MNRAS.420.1462R. doi:10.1111/j.1365-2966.2011.20134.x.
  4. ↑ McGraw, John T.; Robinson, Edward L. (1976). "High-speed photometry of luminosity-variable DA dwarfs: R808, GD 99, and G 117-B15A". Astrophysical Journal, Lett 205: L155–58. Bibcode:1976ApJ...205L.155M. doi:10.1086/182112.