Gyptia Prime
HD 697824, known more commonly as Gyptia Prime, is a spectral GV2 yellow main sequence star that forms the nexus of the Gyptia System. It is orbited by seven planets, the most prominent being Gyptia VI, capital of the Praetorium of Gyptia.
Contents
Star
Structure
Gyptia Prime, like the Sun of the Solar System, has a spectral class of G2V, which indicates a surface temperature of approximately 5,500 K, a yellow color, a spectrum containing lines of ionized and neutral metals as well as very weak lines of hydrogen, and the classification of a main sequence star. This means that it generates its energy by nuclear fusion of hydrogen nuclei into helium and is in a state of hydrostatic balance, neither contracting nor expanding over time. Orbiting Gyptia Prime are 7 officially classified planets as well as a handful of other minor bodies.
The star is nearly perfectly shperical, with around 18 millionths oblateness, meaning it has a polar diameter that is around twenty kilometers less than the equitorial diameter.
Stellar Evolution
Gyptia Prime, according to precise nucleocosmochrinological stellar evolution models, is approximately 5.214 billion years old, and will spend around another 9.75 billion years as a main sequence star. It orbits the gravitational center of the Milky Way galaxy, and lies a mere 3 kiloparsecs from the galactic center, thus traveling at a relatively fast orbital speed of around 680 km/s.
The mass of Gyptia Prime is well below the Chandrasekhar limit, and therefore lacks the mass to explode in a supernova, but will instead enter a red giant phase in around 3-4 billion years, engulfing all orbiting bodies in the system, before releasing its outer layers as a planetary nebula and relaxing into a white dwarf phase where it will begin to cool.
Stellar Activity
Gyptia Prime, like most main sequence stars, experiences starspots, areas marked by lower temperatures than surrounding regions and intense magnetic activity. These spots regularly occur across the face of the sphere, due to fluctuations in the magnetic flux tubes in the convective zones of the star.
The most notable feature on the star's surface, however, is the Stygian Zone, a massive, permanent starspot caused by the magnetic resonance signature of a comet storm that impacted the area around six thousand years ago.
