Why are IO like planets not landable?

An orbital inclination of (-)77.7° suggests in was once a rogue Planet, that has been captured from outside the solar system and pulled in to the orbit of the parent Planet, backed up by a huge Arg of Periapsis, indicating an extremely eccentric orbit!
Arg of Periapsis tells you nothing about the eccentricity (other than it's non-zero (so long as ArgPe is non-zero)), only the direction of the major axis.
 
What am I thinking of? I'm sure there is something that tells you how far 'off-centre' an orbit is?
That will be the eccentricity parameter.
If eccentricity (e) is 0, then the orbit is circular. Between 0 and 1 (exclusive), then the orbit is an ellipse. If e is 1, then the "orbit" is one of: a parabola, a short line segment (degenerate ellipse), or a ray (degenerate parabola or hyperbola), and if greater than 1, the "orbit" is a hyperbola.
The Argument of Periapsis is the angle between the Longitude of the Ascending Node for eccentric orbits, or 0 if e is 0 (periapsis is the point of closest approach, which is undefined for circles).
The Longitude of the Ascending Node is the angle between the reference direction and where the inclined orbit crosses the reference plane, or 0 if the orbit is not inclined.
Inclination is the measure of angle between the reference plane and the orbit plane.
 
SO2... When they have less than 0.01 atmsopheres, it is stated as 0.00. When there is no atmosphere it is stated as No Atmosphere.
Near enough to nothing, anyway. Such a small amount it's probably only sublimating anyway, hard to analyse (hence no composition data) and not a barrier to landing. The things I stated are such barriers. Real world explanation: too hard for FDev to model such landscapes.
 
Near enough to nothing, anyway. Such a small amount it's probably only sublimating anyway, hard to analyse (hence no composition data) and not a barrier to landing. The things I stated are such barriers. Real world explanation: too hard for FDev to model such landscapes.
It may be. But when you are in the DSS and looking for delicious planets to land on, there are things that flash up that clue you in on what is landable and possibly very scenic or interested. These planets trigger those markers and the parameters indicate that this planet should be landable... but they are not, and the even though there is an atmosphere, it does not appear in the System map.
 
I thought that non landable planets weren't just those with a non tenuous atmosphere but also water worlds, and those with active volcanism.

This one if it is like Io would fall foul of the active volcanism clause.
 
I thought that non landable planets weren't just those with a non tenuous atmosphere but also water worlds, and those with active volcanism.

This one if it is like Io would fall foul of the active volcanism clause.
Pretty sure thats what it is, it's the volcanism, its just not a planet type they've created yet with or without an atmosphere.
 
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