Minmus - Kerbal Space Program Wiki (2024)


Minmus as seen from orbit.
Moon of Kerbin
Orbital Characteristics
Semi-major axis 47 000 000m [Note 1]
Apoapsis 47 000 000m [Note 1]
Periapsis 47 000 000m [Note 1]
Orbital eccentricity 0
Orbital inclination
Argument of periapsis 38°
Longitude of the ascending node 78°
Mean anomaly 0.9rad (at 0s UT)
Sidereal orbital period 1 077 311s
49d 5h 15m 10.5s
Synodic orbital period 1 220 131.7s
Orbital velocity 274m/s
Longest time eclipsed 4 378s
Physical Characteristics
Equatorial radius 60 000m
Equatorial circumference 376 991m
Surface area 4.5238934×1010m2
Mass 2.6457580×1019kg
Standard gravitational parameter 1.7658000×109m3/s2
Density 29 242.046kg/m3
Surface gravity 0.491m/s2 (0.05g)
Escape velocity 242.61m/s
Sidereal rotation period 40 400.000s
1d 5h 13m 20s
Sidereal rotational velocity 9.3315m/s
Synchronous orbit 357.94km
Sphere of influence 2 247 428.4m [Note 1]
Atmospheric Characteristics
Atmosphere present No
Scientific multiplier
Surface 5
Splashed N/A
Near space 4
Outer space 2.5
Recovery 2.5
  1. 1.0 1.1 1.2 1.3 The distances are given from the body's center, not from the surface (unlike ingame)

Minmus is the smallest moon of Kerbin. From the surface of Kerbin or the Mun, it is a cyan speck one or two pixels wide which appears to slightly oscillate vertically. This is a result of viewing its rotation from afar. Up close, it is of white in appearance with what seem to be icy buttes, large hills, and frozen lakes. The highest areas are over 5.7km in altitude. It requires somewhat more delta-v to reach Minmus orbit than Mun orbit; however, given its very small gravity, it requires much less to land on the surface and return. This makes Minmus a primary source of Science in the early game after achieving an orbit of Kerbin.

There is a tutorial about traveling to Minmus.


  • 1 In-game Description
  • 2 Orbital characteristics
  • 3 Surface Temperature
  • 4 Topography
  • 5 Biomes
    • 5.1 Biome list
  • 6 KSP2
    • 6.1 Surface Research Locations
      • 6.1.1 Monument
    • 6.2 Maps
      • 6.2.1 Biomes
      • 6.2.2 Visual map
  • 7 Science
  • 8 Reference Frames
  • 9 Gallery
  • 10 Trivia
  • 11 Changes
    • 11.1 KSP 2
  • 12 See also
  • 13 Notes

In-game Description

KSP 1:

Minmus is the smallest moon orbiting Kerbin. From the surface of Kerbin, it can be seen on clear days as a tiny blue speck in the sky.
It is often mistaken as dirt on telescope lenses or dead pixels, but the top minds at the Kerbal Astronomical Society assure us it is a real moon nevertheless.''

Kerbal Astronomical Society

KSP 2:

Kerbin's second moon, Minmus, was long overlooked as most believed it was only a dead pixel or dust, much like Gilly. Despite the challenges of visiting it in its slightly inclined orbit, scientists were eager to study Minmus' fascinating geology, especially after seeing its impossible ice-like surface. Further analysis led researchers to conclude that the "ice" is actually glass, much to the dismay of Minmus's Mystic Crunch Milkshakes.

Orbital characteristics

Minmus orbits Kerbin at a continuous altitude of 46,400,000 meters and takes approximately 920m/s Δv to transfer to from low Kerbin orbit. The synodic period from Kerbin's surface is 14 days, 3 hours and 1 second (1,220,401 seconds). A synchronous orbit around Minmus is possible at an altitude of 357.94km. The orbital speed around Minmus for an object with an altitude of 0m is 171.5m/s.

It is important to be careful when attempting to return to Kerbin from Minmus, as Minmus' high orbit makes it very easy to escape Kerbin's sphere of influence entirely. It may seem that Minmus would make a convenient refueling station for vessels leaving the Kerbin system. However, Kerbin's gravity is large enough that its Oberth effect gives considerable delta-V savings to craft leaving from low Kerbin orbit. Leaving Kerbin from Minmus orbit (which is very high) costs much more delta-V.

An efficient way to return to a lower Kerbin orbit from Minmus is to use a gravity assist around Mun. Plan the maneuver carefully, though, as one gravity assist will send a vessel into a lower energy orbit around Kerbin, but another can send the vessel along an escape trajectory!

Surface Temperature

Minmus' surface temperature reaches 14°C in the day, and -107°C at night.

Calculation of the expected surface temperature for Minmus, using received energy from Kerbol, with the Stefan-Boltzmann Law for the radiated power gives a temperature of -50 degrees Celsius. Whilst this is lower than the measured value, it lends support to the theory that Minmus is a captured comet. It could not have formed at its present location but has an albedo high enough to prevent catastrophic sublimation of its icy composition. A high salt content, if present, would also slow the sublimation process.

This value of temperature was calculated using: An emissivity of 0.9 (close to but lower than compacted ice), an albedo of 0.6 (close to but lower than the real ice moon Europa), and the luminosity of 3 yottawatts for Kerbol.


Minmus has very divergent elevations. Plateaus at around 5km high are matched by "Flats" at datum altitude (0m). Much of the surface is transitional lowlands and highlands. With version 0.23, there are now 9 biomes.

The various "Flats" are almost perfectly flat (great for landing) and believed to have once been the site of liquid lakes. Minmus also has some mesas, one of which is near Minmus's north pole, that are so high compared to Minmus' sphere of influence that they count as "in orbit" according to the navigation tools. Unless the player manually switches the navball to Surface mode, this makes landing on these plateaus challenging, as the direction marker and speed will not automatically correct for the rotation of the surface.

For most landings which are not on a plateau or in a lake, the touchdown altitude is usually between 2000m and 2500m.

A kerbal jumping on this moon will make them ascend 12m from the ground.

Taking a Surface Sample from Minmus says that it is a "crystalline substance, definitely not edible".


Minmus has a total of 9 biomes. The most distinctive quality of Minmus's biomes is the variety of Flats, which in-game text describe as “lake beds”. They are almost perfectly flat and may represent salt flats. Roughly two-thirds of the surface area is irregular terrain transitioning between Highlands, Midlands, and Lowlands with Slopes in-between.

Biome list

Minmus In-game biome map as of 1.2

  • Poles
  • Lowlands
  • Midlands
  • Highlands
  • Slopes
  • Flats
  • Lesser Flats
  • Great Flats
  • Greater Flats


Surface Research Locations

Surface research locations include:

  • Arctic Ice
  • Craters
  • Sheet Ice
  • Snowdrifts


Spoiler: Spoiler

the Monument is a discovery located at the center of a northern crater. It counts as a research location only on the surface, and it is located at 63°37'43" N 56°44'06" W. It consists of a 100m tall stone statue on a circular dais, surrounded by six equidistant pillars. Both the statue and the pillars are adorned with large crystals that emit a soft glow, providing a reference for landing even at night.Finding the Minmus monument is one of the early primary missions of KSP2.



Minmus biome map with legend (as of v0.2.1.0 (from Orbital Survay mod))

Visual map

File:Minmus visual.png

Minus visual map (as of v0.2.1.0)

Minmus visual map (Imgur)


Although the science-multipliers of Minmus's surface and orbit are quite low compared to that of other planets and moons (but a little higher than Mun), Minmus is comparably easy to reach and to return from and has a very large number of biomes which all yield different science results. Unlike Mun, Minmus's biomes are easily discernable by eye, making it easier to run over all biomes without using ScanSat or other similar mods. A relatively small 1.25m lander using LV-909s can reach Minmus, hop over all biomes and return to Kerbin on one run. This makes it – together with Mun – the main source of science points during the midgame.

Reference Frames

Time warp Minimum Altitude
5× 3 000 m
10× 3 000 m
50× 6 000 m
100× 12 000 m
1 000× 24 000 m
10 000× 48 000 m
100 000× 60 000 m


  • A craft landing on Minmus.

  • A full projection map of Minmus as of version 0.15 and above

  • A topographic map of Minmus made with the ISA MapSat plugin

  • Mun and Kerbin as seen from the surface of Minmus

  • A lander escaping Minmus

  • Jeb hopping along the surface of Minmus

  • Minmus, the small, cyan speck..

  • Due to Minmus' inclined orbital plane, It can be seen from Kerbin's south pole for a time.

  • A 2 seater Humvee on Minmus.

  • A Minmus landing party partying after landing.

  • A small old-styled lander flying over a Minmus flat.

Spoiler: Spoiler image

  • The only monolith on Minmus.


  • The name "Minmus" may be derived from the Latin word “minimus”, which denotes the smallest member of a group of beings or creatures, and is also the medical name for the smallest digit on the hand or foot. Minmus is the smallest member of the Kerbin system.
  • "Minimus" is a frequent misspelling of Minmus.
  • It's also possible that Minmus is named after Saturn's moon Mimas.
  • It's been speculated that Minmus was inspired by Haruki Murakami's book 1Q84, in which the protagonist discovers she is in an alternate-reality in part by noticing a tiny, moss-green moon in the sky next to the moon she knows.[1][2]
  • It is possible to deorbit, land and ascend back into orbit around Minmus with the EVA jetpack starting at 100% fuel.
  • If 2HOT Thermometer is used on surface, it shows a temperature of -0.007, which is just enough for water to freeze.
  • If SC-9001 Science Jr. is used near or on Minmus in career mode, it will state that its test samples start to glow due to radiation. This might cause Minmus to have a higher temperature than Mun.
  • Various lines of text in the game mention that Kerbals think Minmus looks like mint ice cream.
  • Minmus is large enough that, if it orbited the Sun, it would be considered a planet or a dwarf planet. If you make Minmus 10 times larger but with the same surface gravity (i.e. you make it Real Solar System sized) Minmus is both larger and denser than the Saturnian moon Mimas, which is the smallest object in the solar system known to be spherical due to hydrostatic equilibrium (its gravity makes it spherical). The criteria for an object being a planet is 1) it must orbit the sun, 2) it must have cleared its orbit, 3) it must be in hydrostatic equilibrium. Dwarf planets disregard the second criterion. If Minmus orbited the sun, it would satisfy at least two of those criteria.
  • Minmus, Gilly, and Pol are the only bodies in the solar system that are completely procedurally generated.
  • Solar System creator NovaSilisko had suggested that Minmus was an ancient comet that had become captured into Kerbin orbit.
  • When a seismic scan is run by the Double-C Seismic Accelerometer on the surface, it says that due to vibrations, the planet may not be entirely solid, meaning that there is most likely a subsurface ocean under the crust of Minmus,


  • Biomes added.
  • Minmus is no longer tidally locked to Kerbin.[3]
  • Minmus' mass reduced.[4]
  • Synchronous orbit is now possible. Previously, it would have required an altitude of 4 302.99km, outside Minmus' sphere of influence.
  • Initial release


  • Research locations added.

See also

  • Tutorial on travelling from Kerbin to Minmus


  1. http://forum.kerbalspaceprogram.com/threads/96074
  2. http://www.nytimes.com/2011/11/10/books/1q84-by-haruki-murakami-review.html
  3. http://www.reddit.com/r/KerbalSpaceProgram/comments/10q9z2/minmus_lost_its_tidal_lock_to_kerbin_in_v017/
  4. http://kerbalspaceprogram.com/forum/showthread.php/24156-Is-Minmus-on-a-weight-loss-program
  • v
  • t
  • e

Kerbol System


(The Sun)

  • Gilly
  • Ike
  • Laythe
  • Vall
  • Tylo
  • Bop
  • Pol
Minmus - Kerbal Space Program Wiki (2024)


Is it easier to land on Minmus or the Mun? ›

But when I was a newb I just had trouble encountering minmus, heck I landed on duna before I landed on minmus. Minmus is much easier and safer to land and return from compared to the Mun. While it can be challenging to get the encounter with Minmus, there's no risk to that -- you can take your time to set it up.

How much DV to return from Minmus? ›

Go back to a ~6km orbit and "drop" behind minmus when going back. With aerobreaking it should not take more than 200-something DV to get back home.

How low can you orbit Minmus? ›

Orbital Characteristics

Synchronous orbit around Minmus is possible at an altitude of 357.94 km.

How do you intercept Minmus in KSP? ›

simple steps:
  1. Target Minmus.
  2. Incline your orbit to match minmus'.
  3. Pick some point and put a node there. Put its apoapsis somewhere near Minmus' orbit.
  4. Drag it around your orbit until you find an interception. Adjust apoapsis as necessary.

What is the hardest planet to return from in KSP? ›

Eve is the real final boss in the game, but thats when your trying to get back to kerbin it has atmosphere and is easy to land on with parachutes, getting back to orbit from eve requires a lot of thought and planning easiest way is a large rocket that can make its own fuel and leave most of it behind, hardest to land ...

How to aim for minmus? ›

While it may not be absolutely necessary, matching your orbital inclination with Minmus makes it much easier to get caught in its SOI. Set Minmus as your target and burn perpendicular to your orbital plane at one of the nodes until they read '0.0' or 'NaN'.

How long is a day on Minmus? ›

Sidereal rotation period1 d 5 h 13 m 20 s
Sidereal rotational velocity9.3315 m/s
Synchronous orbit357.94 km
Sphere of influence2 247 428.4 m [Note 1]
36 more rows
May 19, 2024

Is Minmus tidally locked? ›

Laythe, Tylo, Vall, (and I think maybe Bop and Pol as well,) are tidally locked to jool, and in fact orbit in a 1-2-4 orbital resonance with eachother. The Mun is tidally locked with Kerbin, but Minmus isn't.

What is minmus in real life? ›

Minmus is based off of the real life comet Halley.

What angle do you launch Minmus? ›

As you launch, if you are launching to Minmus' ascending trajectory, you will aim just below the 90 degree mark on the navball (Heading 84 degrees). If you are launching to Minmus' descending trajectory, you will aim just above the 90 degree mark on the navball (Heading 96 degrees).

How many biomes are there in Minmus? ›

The moon of Kerbin, called Minmus, has a total of 9 biomes.

Does Minmus have an atmosphere? ›

does mimus have an atmosphere? Nope. No and it also has lower gravity than Mun so you don't need as many fuel. FYI Only planets have atmospheres, moons never have atmosphere, except for 1 moon (Laythe).

Does KSP have cheats? ›

Pressing ALT+F12 gave you access to the Debug Mode. In Early Access, you can toggle Unbreakable Joints, No Crash Damage, Infinite Propellant, and Infinite Electricity in the Settings Menu under General.

How do I get from Mun to Minmus? ›

To get to Minmus, you have to get inside Minmus' SOI, and to do that from Mun, you have to leave Mun's SOI. Going from one moon to another within a planetary system is a similar transfer then going from one planet to another in a star system.

Can you escape Kerbol in KSP? ›

Kerbol itself has a non relativistic escape velocity, so it is possible to escape Kerbol. But itself it is not possible to escape Kerbol's gravitational pull, because the sphere of influence is infinite.

What is the easiest planet Kerbal? ›

Duna is a terrestrial planet with a red-brown surface and polar ice caps similar to that of Kerbin. Duna's orbit has nearly the same inclination as Kerbin around Kerbol, making the planet one of the easiest to encounter.

What are the easiest countries to represent in MUN? ›

Students often perceive that the five permanent members of the Security Council (USA, Russia, China, UK and France) are the 'best' countries to represent at MUN. If you have been allocated one of these countries, please try to allocate them to your more experienced or more confident delegates.

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