System: 1 Geminorum - All bodies
Distance to Sol: 155.12 ly
Spectral Class: K1 IV - Scoopable
Luminosity Class: IV - Subgiant
Age: 10,292 Million years
Solar Masses: 0.5547
Solar Radius: 0.7542
Surface Temperature: 4,343 K
Absolute Magnitude: 0.9673
HIP ID: 28734
HD ID: 41116
Attractions: None

Class K stars are yellow-orange main sequence stars with a long and generally stable life. They range in mass from 0.6 to 0.9 solar masses and have a surface temperature reaching 5,000 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.