Rarity of "Atmospheric" Ice Worlds

[Starsong]

I've found two large landable icy bodies near their stars (weirdly) with tinted mist in their craters. I know that mist itself isn't that notable, but these two worlds have tinting that makes their skies look much more like atmospheric worlds - indeed, somewhat reminicient of Earthly deserts. Are there particularly rare or deserving of a POI (in the Temple region if this makes a difference)?
Planet 1:

Planet 2:

 

[Orvidius]

Some landables can have a tiny amount of atmospheric pressure. I think the cutoff is at around 0.001 atmospheres. Below that, it's considered airless. But some of the haze can also be due to electrostatic-levitated dust, or cycles of outgassing from surface sublimation due to solar heating. It's been a long time since I've seen this, but I've been on worlds where the sunrise created quite a lot of fog-like haze that dissipated as time progressed. I really wish I took note of where I was, the last time that I saw that. (although, they may have completely re-tuned the effects since then)

ED's respresentation of these processes isn't so much a proper simulation, as it is a visual approximation added for effect. But it's still cool to understand the reasoning that has gone into it.