Casot

Casot is the 4th planet of the HIP 17684 system, whose parent star is a F8IV white subgiant star. 
At the first glance of Casot, her appearance might remind you of the planet Uranus, for she has an axis tlit of 79°, as well as her complex ring system over her equator. Casot is like a smaller, purpler version of Uranus, or, as you might have thought, an elegant lady with a shiny necklace.
==Orbital and rotational facts==
For her high tilt, the seasonal changes on the surface of Casot is slow but obvious, like Uranus. The summer and winter climate in a Casot year (1.518 Earth years, 675.45 Casot days) is completely different.
It's not a coincidence that Casot's SMA is similar to her orbital period in terms of figure,for her parent star's mass is greater than Sol.
== Atmosphere ==
In spite of her small mass and low G,Casot managed to take hold of a "thick" atmosphere.The atmosphere is mostly made up of 56.6% of CO2,21% of H2O and 13.7% of O2.Greenhouse gases' 67.7% percentage is impressive,but the existence of SO2(1.67%) severely weakens it,leading to a mere 4 ℃ of greenhouse effects.
SO2 also "purples" Casot's ocean and her atmosphere.Her rain and snow are always acid because of CO2 and SO2 in her atmosphere. 
== Ocean ==
As has mentioned above,Casot's ocean became purple because of the SO4^2- and SO3^2- salts in it.
It's acid with great amounts of CO2 and SO2 dissolving in it,as well as H+ from generated H2SO4.
Regardless of the chemicals mentioned above,the ocean mainly consists of water.
== Terrain ==
Land cover a large percentage of Casot's surface.There are lakes and rivers,mountains and ridges,canyons and plateaus.The terrain is smooth,compared with most terras.
== General Climate ==
Casot 's general climate is temperate.The greenhouse effect allows her average surface temperature to go beyond 0℃.
Because of her crazy axis tlit,Casot's atmospheric movements are always fierce and many storms dotted her horizon,however this is greatly weakened by her ocean.
== Life ==
There is only unicellcular life in Casot's ocean.There's no life on Casot's land.Given the fact that Casot is very young(1.8B years),this is considerable.However its low complexity,it generated most O2 in her atmosphere.But it's unlikely that it will become intelluctal life,for Casot's parent star has a shorter life than sol.
== Trivias and interesting facts ==
Darkcomet2 doesn't have a 0.990 SE.Casot is discovered by sxfSandy,and was published to this wiki by Darkcomet2.He wrote this article by some screenshots(pictures on this page) provided by sxf.
==Gallery==
File:Casotoverall.png
File:Casotsky.png|Casot sky
Category:Terrae
Category:Real parent procedurals
Category:Procedural objects
Category:Marine
Category:Objects
Category:Planets
Category:Life