System: | chi-1 Hydrae - All bodies | |
Distance to Sol: | 140.99 ly | |
Spectral Class: | F - Scoopable | |
Luminosity Class: | IV - Subgiant | |
Age: | 1,320 Million years | |
Solar Masses: | 1.0430 | |
Solar Radius: | 1.1151 | |
Surface Temperature: | 6,307 K | |
Absolute Magnitude: | 1.9292 | |
Materials: |
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Class F stars are white main sequence stars. They range in mass from 1 to 1.4 solar masses and have a surface temperature reaching 7,600 K.
A subgiant is a star that is slightly brighter than a normal main-sequence (dwarf) star of the same spectral class, but not as bright as true giant stars. Although certain subgiants appear to be simply unusually bright metal-rich hydrogen-fusing stars (in the same way subdwarfs are unusually dim metal-poor hydrogen-fusing stars), they are generally believed to be stars that are ceasing or have already ceased fusing hydrogen in their cores. In stars of roughly a solar mass (M☉), this causes the core to contract, which increases the star's central temperature enough to move hydrogen fusion into a shell surrounding the core. This swells the star on the way to becoming a true giant.