Yellow supergiant
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A yellow supergiant is a star, generally of spectral type F or G, having a supergiant luminosity class. They are stars that have evolved away from the main sequence, expanding and becoming more lumino
The massive RSGC1 cluster contains 14 red supergiants and one yellow supergiant.
Light curve of Delta Cephei, a yellow supergiant classical Cepheid variable
Polaris
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Polaris is a yellow supergiant star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris and is commonly called the North Star. With an apparent magnitude that flu
Yellow supergiant
…the main sequence, expanding and becoming more luminous. Yellow supergiants are hotter and smaller than red supergiants; naked eye examples include Polaris, Alpha Leporis, Alpha Persei, Delta Canis Majoris and Iota¹ Scorpii. Many of them are variable stars, mostly pulsating Cepheids such as δ Cephei itself…
Polaris components as seen by the Hubble Space Telescope
A typical star trail photograph taken in the Northern Hemisphere, with Polaris in the center
Polaris azimuths vis clock face analogy.
Artist's conception showing supergiant Polaris Aa, dwarf Polaris Ab, and the distant dwarf companion Polaris B