Nissee as seen from orbit.
Moon of Neidon
Orbital Characteristics
Semi-major axis 487 743 514 m [Note 1]
Apoapsis 838 918 844 m [Note 1]
Periapsis 136 568 184 m [Note 1]
Orbital eccentricity 0.72
Orbital inclination 29.56 °
Argument of periapsis 0 °
Longitude of the ascending node 66 °
Mean anomaly 2.047 rad (at 0s UT)
Sidereal orbital period 17 981 034 s
832 d 2 h 43 m 54.1 s
Synodic orbital period 18196308.8 s
Orbital Velocity 69 to 422 m/s
Longest Time Eclipsed 62387 s
Physical Characteristics
Equatorial radius 30 000 m
Equatorial Circumference 188 496 m
Surface area 1.1309734×1010 m2
Mass 5.9509224×1018 kg
Standard gravitational parameter 3.9716933×108 m3/s2
Density 52 617.707 kg/m3
Surface gravity 0.441 m/s2 (0.045 g)
Escape velocity 162.72 m/s
Sidereal rotation period 27 924.872 s
1 d 1 h 45 m 24.9 s
Sidereal rotational velocity 6.7501 m/s
Synchronous orbit 168.70 km
Sphere of influence 7 366 476.6 m [Note 1]
Atmospheric Characteristics
Atmosphere present × No
Scientific multiplier
Surface 14
Splashed N/A
Near space 11
Outer space 10
Recovery 10

  1. 1.0 1.1 1.2 1.3 The distances are given from the bodies center not surface (unlike ingame)

Nissee is the second and last moon of Neidon and is the Nereid analog to the game. It orbits Neidon in a highly inclined and eccentric orbit and is very difficult to get to, especially from its retrograde-orbiting, oppositely inclined neighbour, Thatmo

In-Game Description

A small moon in a highly inclined and eccentric orbit around Neidon. Its surface looks strangely similar to marble. As a result it has become the envy of every sculptor on Kerbin.

Kerbal Astronomical Society


Nissee has an unusually high density so far out in the Kerbol system, where most bodies contain large proportions of ice, instead being comparable to inner bodies like Kerbin.. As such, Nissee is likely comprised of mostly rock, though a significant metallic core is unlikely given its location in the outer regions of the system.


Nissee's surface has colours ranging from beige in the uplands to white in the lower regions. Most of Nissee's large craters are concentrated around the huge Maximus Crater, but much of the rest of the surface is a rough series of ridges and valleys peppered by numerous small craters like the Mun. The low gravity and challenging terrain make roving slow and hazardous, though the gravity (marginally lower than Minmus') somewhat mitigates the difficulties of landing on the body.


Nissee has a total of six biomes.

Biome list

Nissee Biome Map

Nissee biome map

  • Maximus Crater
  • Companion Craters
  • Ancient Craters
  • Young Craters
  • Poles
  • Valerian Region

Reference Frames

Warp Minimum Altitude
5× 1 688 m
10× 3 375 m
50× 6 750 m
100× 13 500 m
1 000× 27 000 m
10 000× 54 000 m
100 000× 108 000 m