Difference between revisions of "Eeloo"

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{{Infobox/Body}}
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'''Eeloo''' is a [[w:dwarf planet|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.
 +
 
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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 [[w:Europa (moon)|Europa]], and its orbit is similar to that of [[w:Pluto (dwarf planet)|Pluto]], though both bodies are known to have a tenuous atmosphere.
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Eeloo's relatively large distance from Kerbol reduces [[Electricity#Solar panels|solar power]] to approximately 4% at Eeloo periapsis and 1.4% at Eeloo apoapsis of the values seen at [[Kerbin]]. Bringing additional panels, or an alternate powersource (e.g.: [[PB-NUK Radioisotope Thermoelectric Generator|RTG]]s) is recommended.
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== In-game Description ==
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{{Quote
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|There’s been a considerable amount of controversy around the status of Eeloo as being a proper planet or a just “lump of ice going around the Sun”. The debate is still ongoing, since most academic summits held to address the issue have devolved into, on good days, petty name calling, and on worse ones, all-out brawls.
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|[[Kerbal Astronomical Society]]}}
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== Topography ==
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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.
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Eeloo's surface lacks ground scatter, suggesting the ice on the surface is subject to erosion of some sort.
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It originally had an atmosphere, but it has been removed because the renderer for it doesn't work on [[Celestial body|bodies]] smaller than about Duna's size.<ref>http://www.reddit.com/r/KerbalSpaceProgram/comments/150d8j/ksp_new_planet_for_182_devs_christmas_gift_eeloo/c7icr7o?context=3 by NovaSilisko</ref>
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== Biomes ==
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Eeloo has a total of 11 [[biome]]s.
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=== Biome list ===
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{{Biome list|
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* Poles
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* Northern Glaciers
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* Midlands
 +
* Lowlands
 +
* Ice Canyons
 +
* Highlands
 +
* Craters
 +
* Fragipan
 +
* Babbage Patch
 +
* Southern Glaciers
 +
* Mu Glacier}}
 +
 
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== Orbits ==
 +
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&nbsp;km.
 +
 
 +
Eeloo's eccentric orbit means that at certain points, it is incredibly close to [[Jool]] and in fact that for brief periods, is closer to the Sun than Jool. This means that the effect of Jool gravitational assists in an Eeloo mission can, with the right timing, drastically reduce the time spent on the mission. However, the rarity of this event means that a landed Eeloo craft will have to wait many years to reverse this action precisely and make it back to Kerbin.
 +
 
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== Future ==
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There were plans for Eeloo to become the moon of a [[Gas planet 2|second gas planet]] and have an active surface, with ''cryovolcanic'' phenomena.<ref>http://forum.kerbalspaceprogram.com/showthread.php/35829-Eeloo-Discussion!?p=398040&viewfull=1#post398040 {{Broken link}}</ref><ref name="nova june">[http://forum.kerbalspaceprogram.com/threads/29807-Planet-Ideas-And-Names-For-The-Future-Of-Kerbal-Space-Program?p=447959&viewfull=1#post447959 Post in the forum] by NovaSilisko</ref> 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.<ref name="nova june"/>
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== Easter egg ==
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{{SpoilerBox
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|description=Easter egg about the atmosphere
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|content=
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Actually, there's a very thin atmosphere around Pluto in real world. In the ScienceDefs.cfg file, it says for the [[Gravity Scan]]:
 +
  { 
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    EelooSrfLanded = There appears to be a teneous atmospheric coating around the planet. But it is too thin to affect any spacecraft landing here.
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  }
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So it seemed like there's a very thin but otherwise non-measurable atmosphere out there.
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}}
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== Reference Frames ==
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{{:Eeloo/RefFrame}}
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== Gallery ==
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<gallery>
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ProbeEeloo.jpg    | A small probe on Eeloo.
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Sunset Eeloo.png  | Sunset on Eeloo.
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Eeloo_map_800.gif | A topographic height map of Eeloo as of {{version|0.18.2}}, made with the ISA MapSat plugin.
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Small lander on Eeloo.png | A probe on Eeloo near midday.
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File:Eeloo_Landing_Party.jpeg | A successful landing party on Eeloo.
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Lander and rover on Eeloo.jpg | A crew of very brave kerbonauts and a rover on the surface of Eeloo at sunset.
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EelooOrbit.png | A mid-size interplanetary spaceship orbiting Eeloo at a distance of around 250&nbsp;km.
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EelooOverlook.png | Note the relatively flat topography and complete lack of ground scatter.
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Eeloo Probe.png | It's lonely orbiting this rock, but something has to do it.
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</gallery>
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== Notes ==
 +
<references />
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 +
== Changes ==
 +
;[[1.12]]
 +
* Texture revamp
 +
;[[1.2]]
 +
* Added biomes
 +
;[[0.90]]
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* Added biomes
 +
;[[0.18.2]]
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* Initial release
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{{Celestial Bodies}}
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[[Category:Celestials]]
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[[Category:Planets]]
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[[Category:Dwarf planets]]

Revision as of 17:58, 9 October 2022

Eeloo
Eeloo
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
7 268 d 0 h 54 m 8.4 s
Synodic orbital period 9 776 696.3 s
Orbital velocity 2 764 - 4 706 m/s
Physical Characteristics
Equatorial radius 210 000 m
Equatorial circumference 1 319 469 m
Surface area 5.5417694×1011 m2
Mass 1.1149224×1021 kg
Standard gravitational parameter 7.4410815×1010 m3/s2
Density 28 740.754 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]
Atmospheric Characteristics
Atmosphere present No
Scientific multiplier
Surface 15
Splashed N/A
Near space 12
Outer space 10
Recovery 10
  1. ↑ 1.0 1.1 1.2 1.3 The distances are given from the body's center, not from the 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 4% at Eeloo periapsis and 1.4% at Eeloo apoapsis of the values seen at Kerbin. Bringing additional panels, or an alternate powersource (e.g.: RTGs) is recommended.

In-game Description

“ There’s been a considerable amount of controversy around the status of Eeloo as being a proper planet or a just “lump of ice going around the Sun”. The debate is still ongoing, since 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

 ”

Topography

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.

It originally had an atmosphere, but it has been removed because the renderer for it doesn't work on bodies smaller than about Duna's size.[1]

Biomes

Eeloo has a total of 11 biomes.

Biome list

Eeloo In-game biome map as of 1.2
  • Poles
  • Northern Glaciers
  • Midlands
  • Lowlands
  • Ice Canyons
  • Highlands
  • Craters
  • Fragipan
  • Babbage Patch
  • Southern Glaciers
  • Mu Glacier

Orbits

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.

Eeloo's eccentric orbit means that at certain points, it is incredibly close to Jool and in fact that for brief periods, is closer to the Sun than Jool. This means that the effect of Jool gravitational assists in an Eeloo mission can, with the right timing, drastically reduce the time spent on the mission. However, the rarity of this event means that a landed Eeloo craft will have to wait many years to reverse this action precisely and make it back to Kerbin.

Future

There were plans for Eeloo to become the moon of a second gas planet and have an active surface, with cryovolcanic phenomena.[2][3] 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.[3]

Easter egg

Spoiler: Easter egg about the atmosphere
Actually, there's a very thin atmosphere around Pluto in real world. In the ScienceDefs.cfg file, it says for the Gravity Scan: 
 {  
   EelooSrfLanded = There appears to be a teneous atmospheric coating around the planet. But it is too thin to affect any spacecraft landing here.	
 }
So it seemed like there's a very thin but otherwise non-measurable atmosphere out there.

Reference Frames

Time warp Minimum Altitude
1× Any
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

Gallery

  • A small probe on Eeloo.

  • Sunset on Eeloo.

  • A topographic height map of Eeloo as of version 0.18.2, made with the ISA MapSat plugin.

  • A probe on Eeloo near midday.

  • A successful landing party on Eeloo.

  • A crew of very brave kerbonauts and a rover on the surface of Eeloo at sunset.

  • A mid-size interplanetary spaceship orbiting Eeloo at a distance of around 250 km.

  • Note the relatively flat topography and complete lack of ground scatter.

  • It's lonely orbiting this rock, but something has to do it.

Notes

  1. ↑ http://www.reddit.com/r/KerbalSpaceProgram/comments/150d8j/ksp_new_planet_for_182_devs_christmas_gift_eeloo/c7icr7o?context=3 by NovaSilisko
  2. ↑ http://forum.kerbalspaceprogram.com/showthread.php/35829-Eeloo-Discussion!?p=398040&viewfull=1#post398040 [Broken Link]
  3. ↑ 3.0 3.1 Post in the forum by NovaSilisko

Changes

1.12
  • Texture revamp
1.2
  • Added biomes
0.90
  • Added biomes
0.18.2
  • Initial release
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