12 Pegasi is a
K-type supergiant star in the constellation of
Pegasus
Pegasus (; ) is a winged horse in Greek mythology, usually depicted as a white stallion. He was sired by Poseidon, in his role as horse-god, and foaled by the Gorgon Medusa. Pegasus was the brother of Chrysaor, both born from Medusa's blood w ...
. It has a
spectral type
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the ...
of K0Ib Hdel0.5,
which indicates that it is a less luminous K-type supergiant with strong H-δ
Balmer lines
The Balmer series, or Balmer lines in atomic physics, is one of a set of six named series describing the spectral line emissions of the hydrogen atom. The Balmer series is calculated using the Balmer formula, an empirical equation discovered b ...
. The star has expanded to 81 times the
radius of the Sun, and has an
effective temperature
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation. Effective temperature is often used as an estimate of a body's surface temperature ...
of 4,185 K.
References
K-type supergiants
Pegasus (constellation)
Pegasi, 12
8321
207089
107472
Durchmusterung objects
{{supergiant-star-stub