Kryog

Kryog is the third and the largest terrestrial planet in the Aster System. It is a super-Earth that was an ocean planet in the past.
== Physical Characteristics ==
Kryog is essentially a ball of ice. It is geologically inactive and the whole planet is an ice desert. Kryog is the largest terrestrial planet in the Aster System. It is 16 096 kilometers in diameter and has a mass that of 2 Earths. 1 day on Monach lasts 22 hours. It has no substantial atmosphere, only an exosphere.
== Orbit ==
Kryog orbits Aster once every 9.8 years with an orbital velocity of around 15 km/s, at an inclination of about 4°. Its orbit is elliptical with an eccentricity of 0.05. The closest it gets to Aster is around 4.75 AU and the farthest is around 5.25 AU. It has a semi-major axis of around 5 AU.
== Natural Satellites ==
Kryog has two natural satellites, both of which are suspected to be captured asteroids. They are thought to have been captured relatively recently, a few tens of millions of years ago that is.
=== Mod ===
A quite large reddish S-type asteroid 143 kilometers across. It most likely got captured from the Asteroid Belt located between Kryog and Xechas. What is bizarre about this object is that it seems to be in hydrostatic equilibrium, but that is not the case. The explanation for this shape is that in the past Mod has been disrupted by an impact with the subsequent debris reaccumulating and the rest forming a collisional family in the asteroid belt. Mod orbits Kryog every 7.5 days at a distance of about 52 210 km from its surface.
=== Dimo ===
Dimo is much smaller compared to Mod. It is about 5 kilometers in diameter, but has very similar composition. It is also an S-type asteroid and could be a part of the Mod collisional family, meaning that Kryog has also captured it from the Asteroid Belt. Dimo orbits Kryog every 16 days at a distance of about 122 430 km from its surface.
== History and Future ==
Kryog is about 4 billion years old. When it formed it looked very similar to how it looks nowadays. Icy, desolete and plain, the only difference being that it had an atmosphere and possibly an ocean beneath its crust made of water ice. When Aster turned into a red giant its surface started to melt and it developed into an ocean that could've possibly possesed life, which now is most likely dead. After Aster's turning into a white dwarf Kryog became an icy planet again that slowly kept radiating away the heat in its core until it became geologically dead.
In the future, Kryog will either collide with Aster, or get ejected from the system entirely.
== Colonization ==
The Verdan Federation has been studying Kryog and its moons in the past, but has since then stopped sending rovers or any other vehicles or spacecraft to it. Perhaps in the future the research will be resumed and the first surface base will be built.
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Category:Aster System
Category:Solid Worlds
Category:Aquariae