The diameter of Anubis is slightly larger than that of Jupiter, about 72,000 km radius, even though
it is much more massive. Due to the unchecked gravitational contraction of the planet, the size of a
giant, more massive than Jupiter, does not increase. The lack of fusion prevents the expansion of the
planet. The planet's gravity will crush it until the internal pressures prevent it. While a giant
planet of a mass 84MJ would be approximately the size of Jupiter, a star of mass 90M
J would be much
larger in size. In a star, the outward pressure of the fusion processes in the core counteracts this
contraction. In effect, Anubis is about as large as any gas giant can be.
Anubis has 50 times the gravity of Jupiter. The gravitation of the giant would cause great pressures,
density and heating at the core. Densities are expected to approach that of the core of a star, on
the order of 1e25-26 molecules of H2 per cubic centimeter. The mean density of the planet is about 70
tons per cubic meter. The pressures in the planet are enormous, in excess of 3 million bar. Even
so, the extreme environment deep in the planet is still insufficient to begin nuclear fusion.
The great gravity of Anubis would certainly affect the movements of comets and asteroids moving through the system, as does Jupiter. As Anubis is about one eightieth the mass of its star, it is reasonable to assume that it will have a great deal more influence than Jupiter does. The choice of name of the planet reflects this.