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Eeloo as seen from orbit.
Dwarf planet of Kerbol
Orbital Characteristics
Semi-major axis 90 118 820 000 m [Note 1]
Apoapsis 113 549 713 200 m [Note 1]
Periapsis 66 687 926 800 m [Note 1]
Orbital eccentricity 0.26
Orbital inclination 6.15 °
Argument of periapsis 260 °
Longitude of the ascending node 50 °
Mean anomaly 3.14 rad (at 0s UT)
Sidereal orbital period 156 992 048 s
1 817 d 0 h 54 m 8.4 s
Synodic orbital period 9776696.3 s
Orbital Velocity 2 764 to 4 706 m/s
Physical Characteristics
Equatorial radius 210 000 m
Surface area 5.5417694×1011 m2
Mass 1.1149358×1021 kg
Standard gravitational parameter 7.4410815×1010 m3/s2
Density 28 741.098 kg/m3
Surface gravity 1.69 m/s2 (0.172 g)
Escape velocity 841.83 m/s
Sidereal rotation period 19 460.000 s
5 h 24 m 20 s
Solar day 19 462.412 s
5 h 24 m 22.4 s
Sidereal rotational velocity 67.804 m/s
Synchronous orbit 683.69 km
Sphere of influence 1.1908294×108 m[Note 1]
Highest elevation 3874 m
27° 57′ 0″ N 24° 20′ 24″ E
Atmospheric Characteristics
Atmosphere present × No
Scientific multiplier
Surface 15
Space 12

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

Eeloo is a dwarf planet that was released in version 0.18.2 as a Christmas gift to the KSP community. It is the seventh and farthest planet from Kerbol most of the time, though its orbit intersects Jool's, passing in front of it for a minority of its revolution period. The two planets are locked in a 3:2 resonance, which, coupled with their different inclinations, ensures they cannot collide.

Eeloo has just 3.5% more gravity than the Mun and is very similar in size. Like the Mun, it has no atmosphere. The physical characteristics of Eeloo are most likely an analogue of the ice moon Europa, and its orbit is similar to that of Pluto, though both bodies are known to have a tenuous atmosphere.

Eeloo's relatively large distance from Kerbol reduces solar power to approximately 1/2 to 3/8 of the values seen at Kerbin. Bringing additional panels, or an alternate powersource (e.g.: RTGs) is recommended.

There is a tutorial about How to get to Eeloo.


In-game Description

There’s been a considerable amount of controversy status of Eeloo as being a proper planet or just a lump of ice going around the sun. The debate is still ongoing, as most academic summits held to address the issue have devolved into, on good days, petty name calling, and on worse ones, all-out brawls.

Kerbal Astronomical Society


The surface of Eeloo is relatively smooth and covered in gray-white ice, with deep canyons exposing the brownish rock below. A few craters are visible, but not nearly as one might expect for a body without an atmosphere. Its highest points are near the equator and are almost 3.9 km high, while the lower areas can go lower than sea level.

Eeloo's surface lacks ground scatter, suggesting the ice on the surface is subject to erosion of some sort.


Eeloo's distant, eccentric and inclined orbit, in addition to its low gravity, make encounters challenging. Its distance from Kerbin also tends to make missions very lengthy.

A synchronous orbit around Eeloo is possible, at an altitude of ~683.9 km.


Using the Remote Tech plugin, path lengths from Kerbin can reach up to around 127 Gm (127 billion meters), resulting in a round trip delay longer than 14 minutes. Even at the closest approach, the communication delay is more than 6 minutes.


There were plans for Eeloo to become the moon of a second gas planet and have an active surface, with cryovolcanic phenomena.[1][2] It is unknown what Eeloo's parent planet was intended to look like, but according to former developer NovaSilisko Eeloo was to be the innermost moon of three other major moons.[2]

Reference Frames

Warp Minimum Altitude
5× 4 000 m
10× 4 000 m
50× 20 000 m
100× 30 000 m
1 000× 40 000 m
10 000× 70 000 m
100 000× 150 000 m



It originally had an atmosphere, but as it turns out the atmosphere renderer hates when you have them on bodies smaller than about Duna's size.[3]


  1.!?p=398040&viewfull=1#post398040 [Broken Link]
  2. 2.0 2.1 Post in the forum by NovaSilisko
  3. by NovaSilisko


  • Initial Release
TinyKerbol.png TinyMoho.png TinyEve.png TinyKerbin.png TinyDuna.png TinyDres.png TinyJool.png TinyEeloo.png
(The Sun)
Moho Eve Kerbin Duna Dres Jool Eeloo
Gilly Mun
Ike Laythe