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Moho as seen from orbit.
Planet of Kerbol
Orbital Characteristics
Semi-major axis 5 263 138 304 m [Note 1]
Apoapsis 6 315 765 980 m [Note 1]
Periapsis 4 210 510 628 m [Note 1]
Orbital eccentricity 0.2
Orbital inclination 7.0 °
Argument of periapsis 15 °
Longitude of the ascending node 70 °
Mean anomaly 3.14 rad (at 0s UT)
Sidereal orbital period 2 215 741 s
102 d 3 h 29 m 0.9 s
Synodic orbital period 2918328.9 s
Orbital Velocity 12 186 to 18 279 m/s
Physical Characteristics
Equatorial radius 250 000 m
Equatorial Circumference 1 570 796 m
Surface area 7.8539816×1011 m2
Mass 2.5263617×1021 kg
Standard gravitational parameter 1.6861140×1011 m3/s2
Density 38 599.963 kg/m3
Surface gravity 2.70 m/s2 (0.275 g)
Escape velocity 1 161.42 m/s
Sidereal rotation period 1 210 000.0 s
56 d 0 h 6 m 40 s
Solar day 2 665 742.7 s
123 d 2 h 29 m 2.7 s
Sidereal rotational velocity 1.2982 m/s
Synchronous orbit 18 173.24 km
Sphere of influence 9 646 663.0 m[Note 1]
Atmospheric Characteristics
Atmosphere present × No
Scientific multiplier
Surface 10
Near space 8
Outer space 7

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

Moho is the third-smallest planet and the one closest to Kerbol, with an orbital period of 102 days, the shortest in the Kerbol system, and an orbital velocity ranging from 12-18km/s, is also the fastest celestial body in Kerbal Space Program. It is the Mercury analogue. Moho lacks an atmosphere and natural satellites. The planet gets its name from the Mohorovičić discontinuity, the boundary between the Earth's crust and mantle.

Moho's inclined, low, and eccentric orbit and lack of atmosphere or moons (for aerobraking and gravity assists, respectively) make encountering the planet relatively difficult. Without an atmosphere to retain or block heat, Moho's daytime surface temperatures can exceed 300°C, making radiators an absolute necessity if any part (such as drills or engines) must be cool to operate both safely and effectively.

In-game Description

Moho figures in Kerbal mythology as a fiery place with oceans of flowing lava. In reality, however, it's much less interesting.

Scientists speculate about possible ways to make it awesome like in the stories. Some of those ideas have led to new breakthroughs in aerospace technology.

Kerbal Astronomical Society


Moho's surface ranges from light brown highlands to dark brown basins, possibly the product of volcanism. Its highest point is in its northern hemisphere at an altitude of 6817 m. Moho's heavy cratering suggests erosion caused by tidal friction with Kerbol.

Moho has a very deep well at its geographic north pole, called the Northern Sinkhole. The Mohole is about 4.6 kilometers deep, and has a descending angle of 80 degrees. [1] The hole is a glitch in the procedural generation of terrain; many other bodies with land at the north pole have similar bugs.[2] Despite the appearance of another hole at the geographic south pole in Map View, one does not exist.

The Mohole can destroy craft and kill Kerbals that fall into it.


Moho has 12 biomes. It is one of two bodies (the other being Ike) that have their own North and South Pole biome. It is dottet with Minor Craters and features four distinct Lowland Biomes. The Mohole also features as a Biome within the North Pole with the Mohole's Rim being a seperate Biome.

Biome list

Moho biome map as of 1.2
  • North Pole
  • Northern Sinkhole Ridge
  • Northern Sinkhole
  • Highlands
  • Midlands
  • Minor Craters
  • Central Lowlands
  • Western Lowlands
  • South Western Lowlands
  • South Eastern Lowlands
  • Canyon
  • South Pole

Orbital Statistics

Mohosynchronous and semi-synchronous orbits are impossible — they would require altitudes of 18 182.08 km and 11 361.48 km respectively, both of which are beyond Moho's sphere of influence.

Reference Frames

Warp Minimum Altitude
5× 10 000 m
10× 10 000 m
50× 30 000 m
100× 50 000 m
1 000× 100 000 m
10 000× 200 000 m
100 000× 300 000 m

Solar System Counterpart

Moho is the apparent Kerbol System analog of the planet Mercury. Both share a similar cratered landscape, like most bodies with little to no atmosphere. Due to the lack of an atmosphere to retain heat, Moho and Mercury are freezing on the night side and, relative to Earth, extremely hot on the day side. Both planets are the closest to their respective stars and lack natural satellites.

However, Moho has a brown surface, while Mercury has a dark grey surface. In addition, Mercury has a tenuous atmosphere of about 10⁻¹³ kPa while Moho has no atmosphere; although, a pressure of 10⁻¹³ kPa (≃ 10⁻¹⁵ atm) would be rendered "unmeasurable" by the PresMat Barometer and register in KSP as a vacuum.



  • Added biomes
  • New, procedurally generated, textures added, with higher detail craters.
  • Entirely changed more cratered surface.
  • Color changed from red to brown.
  • No more superheated atmosphere.
  • No longer tidally locked.
  • Mass reduced.
  • Initial Release


  1. Moho's Secrets Revealed