HD 149026 [SEP] constellation
HD 149026
HD 149026, also named Ogma , is a yellow subgiant star approximately 250 light-years from the Sun in the constellation of Hercules. An extrasolar planet (designated HD 149026 b, later named Smertrios) is believed to orbit the star.
Nomenclature.
HD 149026 in the star's identifier in the Henry Draper Catalog. Following its discovery in 2005 the planet was designated HD 149026 b.
In July 2014 the International Astronomical Union launched a process for giving proper names to certain exoplanets and their host
uncertainty in the stellar radius", and measurement of the stellar radius is distorted by pollution on the star's surface.
Even allowing for uncertainty the radius of HD 149026 b is only about three quarters that of Jupiter (or 83% that of Saturn). HD 149026 b was the first of its kind: HD 149026 b's low volume means that the planet is too dense for a Saturn-like gas giant of its mass and temperature.
It may have an exceptionally large core composed of elements heavier than