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| − | {{Infobox/Body}}
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| − | '''아이크'''는 [[Duna/ko|듀나]]의 유일한 [[w:natural satellite|자연 위성]]입니다. 아이크는 험하고 비탈진 지형을 가지고 있으며 대기는 존재하지 않습니다. 아이크는 그 크기와 듀나와의 가까운 거리 때문에 듀나에 조석 고정되어 있습니다. 즉 아이크는 듀나의 동기 궤도를 돌고 있다는 뜻이죠. 때문에 듀나와 아이크의 표면에서 서로를 관찰하면 절반만 보이게 됩니다. (완벽하게 절반이겠지만. 아이크의 궤도 경사 때문에 절반보다 더 보이거나 혹은 그 반대일 수도 있습니다)
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| − | 아이크에서의 정지 궤도 형성은 불가능합니다 — 왜냐하면 정지 궤도가 형성 가능한 고도는 {{OrbitAltitude|b=Ike|f=k}}, 인데 이는 아이크의 중력 영향권 밖입니다. 하지만, 아이크는 듀나에 조석 고정되어 있어서 듀나의 궤도를 도는 우주선을 아이크에서 보면 선회하지 않는 모습으로 보여질 것입니다. 이 또한 아이크의 궤도 경사와 궤도 이심률 때문에 완벽하게 정지해 보이지는 않습니다.
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| − | 듀나는 실제 태양계의 화성에 대응되지만, 아이크는 화성의 위성인 데이모스와 포보스에는 대응되는 것은 아닙니다. 듀나와 아이크는 실제 태양계의 명왕성과 그의 위성인 카론과 비슷한 경우입니다.
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| − | == 게임 내 설명 ==
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| − | {{Quote
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| − | |아이크는 상대적으로 크고 회색빛을 띄는 천체로 가끔씩 듀나의 궤도를 공전하는 모습이 포착됩니다. <br><br> Scientists have postulated that Ike is seemingly perfectly positioned to sneakily interfere with any object that presumes to come orbiting near its parent.
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| − | |Kerbal Astronomical Society}}
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| − | == Geostationary properties and libration ==
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| − | <!--[[File:Ikes libration.gif|thumb|left|An animation of an orbit viewed from Duna (thumbnail is currently not working)]]-->
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| − | Ike's orbit keeps it directly above a short range of Duna longitudes. The average Duna longitude where Ike tends to stay directly above in the sky (at the [[w:Zenith|Zenith]]) is 3 degrees east, but the exact longitude oscillates between about 0 degrees and 6 degrees east due to the eccentricity of Ike's orbit. This eccentricity also makes Ike appear to grow slightly larger and smaller to an observer on the surface of Duna. The latitude for which Ike is in the Zenith also oscillates between 0.2 degrees south and 0.2 degrees north due to Ike's orbital inclination, making Ike appear to rotate upwards and downwards as viewed from the surface, but due to the extremely small orbital inclination, this effect is nearly imperceptible. These phenomena together are known as [[w:Libration|libration]]. Due to the oscillation in Ike's position above the horizon, areas from 90°W to 84°W and 90°E to 96°E on Duna can observe Ike rise and set at least partially across the horizon, as can any areas north of 89.8°N or south of 89.8°S
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| − | Traveling from a 50 km Duna orbit to a 10 km Ike orbit requires approximately 435 m/s of delta-V.
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| − | <!--
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| − | Ike orbits 3200 km above Duna's center, or 2880 km above Duna's surface. Turning a 50x50 km Duna orbit (speed: 902.5 m/s) into a 50x2880 km one (periapsis speed: 1208.4 m/s) requires a burn of 305.9 m/s. Assuming the ship enters Ike's SOI with a speed of 100 m/s and a periapsis of 10 km, turning this into a 10x10 km Ike orbit requires requires a burn of 125.6 m/s at periapsis. Total: 305.9 + 125.6 = 431.5 m/s.
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| − | Source: https://github.com/numerobis/KSP-scripts/blob/master/planet.py
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| − | > from planet import *
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| − | > ike.soiBurn(10000, 100) # first argument is periapsis (in meters), second is speed on exiting SOI
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| − | The return trip requires the same two burns, reversed -- one burn to escape Ike's SOI, the second to circularize around Duna -- but [[aerobraking]] around Duna can greatly reduce the 305.9 m/s cost of the circularization burn.
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| − | -->
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| − | == Topography ==
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| − | Ike is extremely rocky. Its tallest points are 12.75 km above its lowest, giving it an elevation range over 3 times that of the [[Mun]]<!--3.34 km--> despite the fact that the Mun has a 54% wider radius and 137% more surface area. The increased elevation and smaller size result in many steep slopes and make landing quite difficult. The bottoms of valleys are among the flatter, safer landing locations.
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| − | Ike lacks any visible impact craters. This is strange considering that it has no atmosphere and isn't much smaller than the [[Mun]] which has plenty of craters.
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| − | The ground is dark grey, notably darker than that of other rock moons like [[Mun]], and sprinkled with large rocks when terrain scatters are on. Sometimes the ground doesn't reflect sunlight, which generates an effect where if someone is looking at the ground, it seems to be nighttime; only looking up shows that it is actually daytime.
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| − | == Biomes==
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| − | Ike has 8 [[biome]]s. It is one of two bodies (the other being [[Moho]]) that has their own North and South Pole biome.
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| − | === Biome list ===
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| − | {{Biome list|
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| − | * Polar Lowlands
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| − | * Midlands
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| − | * Lowlands
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| − | * Eastern Mountain Ridge
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| − | * Western Mountain Ridge
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| − | * Central Mountain Range
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| − | * South Eastern Mountain Range
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| − | * South Pole}}
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| − | == Tracking Station Info ==
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| − | Ike is a relatively large, grey object occasionally seen orbiting Duna. Scientists have postulated that Ike is seemingly perfectly positioned to sneakily interfere with any object that presumes to come orbiting near its parent.
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| − | === Easter eggs ===
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| − | {{SpoilerBox
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| − | |description= Reference to do not taunt with the happy play ball
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| − | |content= The magic Boulder
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| − | There is a boulder locked in a polar orbit, roughly 100 cubic meters, with green bands and a monolith. It has no gravitational pull (and is not affected by gravity). It has a flawed collision box, so an attempted landing always results in an explosion of some kind. It's called 'The Magic Boulder' which is its official name shown in the log entry "Ship crashed into magic boulder". An example video has been made by YouTuber Scott Manley, who maintained a distance of 8 meters long enough to give viewers an excellent picture of the object. (http://www.youtube.com/watch?v=WJBSea-3DHs) .However, this is in an older version of the game and the boulder in all removed/dissappeared in the game.}}
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| − | == Reference Frames ==
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| − | {{:Ike/RefFrame}}
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| − | == Gallery ==
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| − | <gallery>
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| − | File:Gravitational_Assist.png|A gravitational assist from Ike can help reduce descent velocity down to Duna's surface.
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| − | Ike_Eclipse.png | Ike eclipsing the sun as seen from Duna
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| − | Ike.png | Ike as seen in the Tracking Station
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| − | Ike-sky.png | Ike's sky, with [[Duna]] in it at all times as well as [[Kerbol]]
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| − | Ike-landing.png | A landing party on Ike's surface
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| − | File:PermafrostIkeLander.png | Small lander ascending from Ike.
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| − | IkeOrbit.png | Jebediah Kerman floating in front of a large spacecraft which is orbiting Ike. In the background you can see Duna.
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| − | Gui_Ike_ISA_Topo.png | Topographical map of Ike
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| − | Gui_Ike_Polars_Topo.png | Polar topographical map
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| − | Ike_map_800.gif | A topographic height map of Ike made with the ISA MapSat plugin
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| − | </gallery>
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| − | == Changes ==
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| − | ;{{Version|0.90|}}
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| − | * Added biomes
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| − | ;{{Version|0.17|}}
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| − | * Initial release
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| − | {{Celestial Bodies}}
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| − | [[Category:Celestials/ko]]
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| − | [[Category:Moons/ko]]
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