Stellar forge inconsistency?

[Polemarchos]

While exploring some systems on my way to bubble nebula I found system with several planets clasiffied as icy planets while their surface temperature was above 273K and atmospheric pressure high as well. Actually in some cases temperature was well above it actually exceeded boiling point of water. In such condition I find hard to imagine water ice could exist anywhere on planet yet classification was same for all of them... see in screenshot.

Spoiler

 

[JackBassV]

That is funny.

For those who don't know, 400k is approx 127° Celsius. Even with an atmospheric pressure of 55, most of the water should be in vapour form, so I'd expect the atmospheric composition to contain at least some water.

 

[dryjoy]

I don't know how they use the term icy in ED, but I think astronomers sometimes use it to refer to certain compounds, such as water, methane and ammonia, regardless of temperature. Not sure if that's a valid explanation in this case.

 

[Monk]

I think when referring to ice planets we are looking at planets that are water down to the core. At those high internal pressures water ice will form.

There are other icy rocky planets that are rocky with water in some phase on the surface

 

[Defacto]

I think when referring to ice planets we are looking at planets that are water down to the core. At those high internal pressures water ice will form.

There are other icy rocky planets that are rocky with water in some phase on the surface

It looks like that planet has liquid water on the surface, so I think you are right.
In some cases the atmospheric pressure is actually high enough that you get water ice on the surface even with a surface temperature at several hundred degrees celsius.

 

[RedWizzard]

I'm not sure it's wrong. I think "water world" is a rocky world whose surface is (mostly) covered in water. This world is 90% water/ice so even though it's liquid on the surface (however "surface" is defined) it still qualifies as an "ice world".

 

[OnePercent]

Pressure plays into it a lot.

 

[Defacto]

I'm not sure it's wrong. I think "water world" is a rocky world whose surface is (mostly) covered in water. This world is 90% water/ice so even though it's liquid on the surface (however "surface" is defined) it still qualifies as an "ice world".

There's many water worlds with a lot of dry surface. I think what defines a water world in ED is that it has a Water cycle and life, but is not an outdoor world (if it was, it would be a Earthlike).

For this Ice world, I think you're right, it's probably only the surface that is liquid.

 

[Tornado]

If you do the maths I think water will boil at about 275°c at 55 atmospheres. That's well above 400k !

 

[Polemarchos]

I think when referring to ice planets we are looking at planets that are water down to the core. At those high internal pressures water ice will form.

There are other icy rocky planets that are rocky with water in some phase on the surface

Good point, seems to be this case. I didnt notice content of whole body and as it is mostly composed by water ice instead of silicate minerals then icy world seems ligitimate. If we look on small radius of the body then it is possible that internal heat is completelly gone and then there probably could be water stable in an ice form.