Ike/ko
| 아이크
(Ike) | ||
 | ||
| 아이크 을 궤도에서 바라본 모습이다. | ||
| 달 , 모항성(혹은 모행성)은 듀나 | ||
| 궤도 특성 | ||
| 반장축 | 3 200 000 미터 [Note 1] | |
| 遠點 | 3 296 000 미터 [Note 1] | |
| 近點 | 3 104 000 미터 [Note 1] | |
| 궤도이심률 | 0.03 | |
| 궤도 경사 | 0.2 ° | |
| 근일점 편각 | 0 ° | |
| 승교점 경도 | 0 ° | |
| 평균 근점 이각 | 1.7 rad (에서 0초 UT) | |
| 항성 주기 | 65 518 초 | |
| 3 d 0 h 11 m 57.9 s | ||
| 회합 주기 | 65 766.7 초 | |
| 공전 속도 | 298 - 316 미터/초 | |
| 가장 긴 시간이 가려졌습니다. | 2 153 초 | |
| 물리적 특성 | ||
| 적도 반지름 | 130 000 미터 | |
| 적도 둘레 | 816 814 미터 | |
| 겉넓이 | 2.1237166×1011 미터2 | |
| 질량 | 2.7821615×1020 킬로그램 | |
| 표준 중력 파라미터 | 1.8568369×1010 미터3/초2 | |
| 밀도 | 30 231.777 킬로그램/미터3 | |
| 표면 중력 | 1.10 미터/초2 (0.112 그램) | |
| 탈출 속도 | 534.48 미터/초 | |
| 항성 회전 기간 | 65 517.862 초 | |
| 3 d 0 h 11 m 57.9 s | ||
| 항성 회전 속도 | 12.467 미터/초 | |
| 동기 궤도 | 영향권 밖 | |
| 인력권 | 1 049 598.9 미터 [Note 1] | |
| 대기 특성 | ||
| 대기 유무 | 아니 | |
| 연구 점수 획득 배수 | ||
| 지면 | 8 | |
| 얼룩덜룩 한 | N/A | |
| 천체 근처 우주공간 | 7 | |
| 천체에서 먼 우주공간 | 5 | |
| 회복 | 5 | |
|
| ||
Ike is a moon and the only natural satellite of Duna. Ike has steep, rocky slopes and no atmosphere. Ike and Duna are tidally locked due to their proximity and Ike's size. This means that Ike is in synchronous orbit around its parent body, and that each body is only visible from approximately half of its partner's surface. (It would be exactly half, but Ike's slightly eccentric orbit creates regions for which Ike can be seen to set and rise. See Libration, below)
An encounter with Ike is quite likely when approaching Duna, provided the player's trajectory is near the plane of Ike's orbit. This is because Ike's sphere of influence is very high relative to the semi-major axis of its orbit — in fact, no other moon in the game has a larger SOI-to-semi-major-axis ratio and no other moon is as close in mass to its parent – Ike has about 16% the mass of Duna.
Stationary orbit around Ike is not possible — it would require an altitude of 1 133.90 킬로미터, outside of Ike's sphere of influence. However, since Ike and Duna are tidally locked to each other, a spacecraft in stationary orbit around Duna will see Ike in a near stable, non-rotating position, as if it were in a stationary Ike orbit. It is not perfectly stationary as Ike has both a non-zero orbital eccentricity and a very small orbital inclination.
Although Duna is the game analog for Mars, Ike does not seem to represent Phobos or Deimos. The Duna-Ike system could be interpreted as an analog of Pluto-Charon – in the real solar system, no moon has a mass as similar to its parent body as Charon.
Contents
In-game Description
| “ | 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. — Kerbal Astronomical Society |
” |
Geostationary properties and libration
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 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 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
Traveling from a 50 km Duna orbit to a 10 km Ike orbit requires approximately 435 m/s of delta-V.
Topography
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 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.
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.
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.
Biomes
Ike has 8 biomes. It is one of two bodies (the other being Moho) that has their own North and South Pole biome.
Biome list
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Tracking Station Info
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.
Easter eggs
Reference Frames
| 시간 배속 | 최저 고도 |
|---|---|
| 1× | 어디서든지 |
| 5× | 5 000 미터 |
| 10× | 5 000 미터 |
| 50× | 10 000 미터 |
| 100× | 25 000 미터 |
| 1 000× | 50 000 미터 |
| 10 000× | 100 000 미터 |
| 100 000× | 200 000 미터 |
Gallery
A gravitational assist from Ike can help reduce descent velocity down to Duna's surface.
Ike eclipsing the sun as seen from Duna
Ike as seen in the Tracking Station
A landing party on Ike's surface
Small lander ascending from Ike.
Jebediah Kerman floating in front of a large spacecraft which is orbiting Ike. In the background you can see Duna.
Topographical map of Ike
Polar topographical map
A topographic height map of Ike made with the ISA MapSat plugin
Changes
- Added biomes
- Initial release
