TY Coronae Borealis explained

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.^[1] It is 107 light-years distant from Earth. It was confirmed as a variable star in 1976.^[2]

Notes and References

1. Romero, A. D. . Córsico, A. H. . Althaus, L. G. . Kepler de Souza Oliveira . 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. 10.1111/j.1365-2966.2011.20134.x . free . 2012MNRAS.420.1462R. 1109.6682 . 55018129.
2. 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. 10.1086/182112 . 1976ApJ...205L.155M.