Laythe's atmosphere begins at 55,500 meters and is slightly less dense than Kerbin's. It is the only natural satellite in the game which has an atmosphere.
Like all other atmospheres in the game, Laythe's atmosphere fades exponentially with increasing altitude (with a scale height of 4000 m). In general, the atmospheric pressure on Laythe at an altitude expressed in meters is:
With proper aerobraking near Laythe and Jool, reaching Laythe may require the least delta-V of all of Jool's moons. When approaching Jool on a Hohmann transfer orbit from Kerbin, aerobraking with a Jool periapsis of 119.5 km will put your apoapsis roughly near Laythe's orbit.
Rotational/Inertial transition: >600,000 m
- Initial Release
- A nuclear engine has a specific impulse of 220 in 1 atm, 800 in vacuum, and the following at various Laythe altitudes:
altitude (m) 600 1464 1800 2238 2698 3296 4104 16435 specific impulse 400.7 478.2 504.2 534.8 563.7 596.5 633.7 792.4