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Loading contentHR 4163 is a main-sequence star in the constellation Hydra (Hydrae), lying about 679.5 light-years from Earth.
Class C (carbon star). Cool carbon stars — evolved red giants whose atmospheres hold more carbon than oxygen, giving them a striking deep-red, ruby colour. Such stars have surface temperatures around ≤ 3,200 K and appear deep red to the eye.
| Spectral type | C |
| Apparent magnitude | 4.89 |
| Absolute magnitude | -1.7 |
| Luminosity (Sun = 1) | 418 |
| Colour index (B−V) | 2.8 |
| Distance | 679.5 ly (208.33 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
A main-sequence star fuses hydrogen into helium in its core. It will remain on the main sequence for most of its life before evolving into a giant.
Facts on this topic will be cited from these primary and reference sources.
Aggregated, openly-licensed star catalogue combining Hipparcos, the Yale Bright Star Catalogue, and the Gliese Catalogue of Nearby Stars.
High-precision parallax, magnitude, and position for ~118,000 stars.