Difference between revisions of "Moho"

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[[File:moho.png|thumb|right|The TARDIS orbiting Moho.]]
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{{Infobox/Body}}
[[File:moho_tracking.png|thumb|right|Telescopic view of Moho in 0.17]]
 
  
'''Moho''' is the innermost planet of the [[Kerbol]] star system. Due to its close proximity to Kerbol the thin atmosphere's temperature is debilitatingly high; rockets overheat easily and landing requires a high thrust-to-weight ratio and/or heat-resistant rocket designs.
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'''Moho''' is the third-smallest planet and the one closest to [[Kerbol]], with an orbital period of 102 days, the shortest in the [[Kerbol System|Kerbol system]], and an orbital velocity ranging from 12-18km/s, is also the fastest [[celestial body]] in [[Kerbal Space Program]]. It is the [[w:Mercury (planet)|Mercury]] analogue. Moho lacks an [[atmosphere]] and natural satellites. The planet gets its name from the [[w:Mohorovičić discontinuity|''Moho''rovičić discontinuity]], the boundary between the [[w:Earth|Earth]]'s crust and mantle.
  
== Characteristics ==
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Moho's inclined, low, and eccentric [[orbit]] and lack of atmosphere or moons (for [[aerobraking]] and [[Tutorial: Gravity Assist|gravity assist]]s, respectively) make [[encountering]] the planet relatively difficult.  Without an atmosphere to retain or block heat, Moho's daytime surface temperatures can exceed 300°C, making [[radiator]]s an absolute necessity if any [[part]] (such as drills or engines) must be cool to operate both safely and effectively. Moho rotates very slowly, its solar day being over 100 times longer than Kerbin's, which means that reconnaissance satellites will likely wait a long time between targets, but it also means that there may be several opportunities to perform individual measurements across multiple orbits.  Although Moho's close proximity to the sun increases solar panel output to 10.4x that of Kerbin's at periapsis, excessive heat can cause cooling issues for mining operations and the extremely long nights will necessitate bringing an alternative power source ([[PB-NUK Radioisotope Thermoelectric Generator|RTGs]] or [[Fuel cell|fuel cells]]) for extended surface operations.
  
*[http://en.wikipedia.org/wiki/Radius Equatorial Radius]: 250 km
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== In-game Description ==
  
*[http://en.wikipedia.org/wiki/Mass Mass]: 3.675e21 kg
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{{Quote
 +
|Moho figures in Kerbal mythology as a fiery place with oceans of flowing lava. In reality however, it’s much less interesting. <br />
 +
<br />
 +
''Scientists speculate about possible ways to make it “awesome like in the stories”. Some of those ideas have led to new breakthroughs in aerospace technology.''
 +
|[[Kerbal Astronomical Society]]}}
  
*[http://en.wikipedia.org/wiki/Density Density]: 56.1454 g/cm³
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== Topography ==
 +
Moho's surface ranges from light brown highlands to dark brown basaltic basins and a large depression called the Northern Sinkhole near the North pole (not to be confused with the [[Mohole]])-these features, together with surface reports, strongly evidence the presence of past [[w:volcanism|volcanism]]. Its highest point is in its northern hemisphere at an altitude of 6817 m. Moho's heavily eroded surface and lack of ground scatter despite there being no atmosphere suggest active [[w:space weathering|space weathering]] processes.
  
*[http://en.wikipedia.org/wiki/Surface_gravity Surface Gravity]: 3.92 m/s²
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Moho has a very deep well at its geographic north pole, called the [[Mohole]]. The Mohole is about 4.6 kilometers deep, and has a descending angle of 80 degrees. <ref>“[[thread:48006|Moho's Secrets Revealed]]” </ref> The hole is a glitch in the procedural generation of terrain; many other bodies with land at the north pole have similar bugs.<ref>https://www.youtube.com/watch?v=-e5SGynBJ4Y</ref> Despite the appearance of another hole at the geographic south pole in [[Map View]], one does not exist.
  
*[http://en.wikipedia.org/wiki/Standard_gravitational_parameter Gravitational parameter]: ... km³/s²
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The Mohole can destroy craft and kill Kerbals that fall into it.
  
*[http://en.wikipedia.org/wiki/Escape_velocity Escape velocity] from surface: 1401 m/s
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== Biomes ==
 +
Moho has 12 [[biome]]s. It is one of three bodies (the other being [[Kerbin]] and [[Ike]]) that have their own North and South Pole biomes. It is dotted with Minor Craters and features four distinct Lowland Biomes. The [[Mohole]] is registered as part of the South pole despite being at the North pole.
  
*[http://en.wikipedia.org/wiki/Rotation_period Sidereal Rotation Period]: 615.49 hours; [http://en.wikipedia.org/wiki/Rotation Rotation]: ... [http://en.wikipedia.org/wiki/Degree_(angle) degrees] per hour, or 0.7 m/s at the [http://en.wikipedia.org/wiki/Equator equator]
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=== Biome list ===
 +
{{Biome list|list=
 +
* North Pole
 +
* Northern Sinkhole Ridge
 +
* Northern Sinkhole
 +
* Highlands
 +
* Midlands
 +
* Minor Craters
 +
* Central Lowlands
 +
* Western Lowlands
 +
* South Western Lowlands
 +
* South Eastern Lowlands
 +
* Canyon
 +
* South Pole}}
  
* [http://en.wikipedia.org/wiki/Solar_day Solar Day]: Moho is tidally locked to Kerbol.
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== Orbital Statistics ==
 +
Mohosynchronous and semi-synchronous orbits are impossible — they would require altitudes  of {{OrbitAltitude | period=1210000 | mass=2.53e21 | radius=250000 | factor=k }} and {{OrbitAltitude | period=605000 | mass=2.53e21 | radius=250000 | factor=k }} respectively, both of which are beyond Moho's [[sphere of influence]].
  
*[http://en.wikipedia.org/wiki/Geosynchronous_orbit Synchronous Orbit] altitude: 30993.5721 km; [http://en.wikipedia.org/wiki/Geostationary_orbit Stationary Orbit] velocity: 88.6 m/s
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== Reference Frames ==
 
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{{:Moho/RefFrame}}
== Orbital Characteristics ==
 
 
 
*[http://en.wikipedia.org/wiki/Focus_(geometry) Parent Body]: [[Kerbol]]
 
 
 
*[http://en.wikipedia.org/wiki/Semi-major_axis Semi-Major Axis]: 5263000000 m or 0.035180982 [http://en.wikipedia.org/wiki/Astronomical_unit Astronomical Units (A.U.)]
 
 
 
*[http://en.wikipedia.org/wiki/Orbital_inclination Inclination]: 7°
 
 
 
*[http://en.wikipedia.org/wiki/Orbital_speed Velocity]: 12,185.9 - 18,278.8 m/s
 
  
*[http://en.wikipedia.org/wiki/Longitude_of_the_ascending_node Longitude of Ascending Node]: 70°
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== Solar System Counterpart ==
 +
Moho is the apparent [[Kerbol System]] analog of the planet Mercury. Both share a similar cratered landscape, like most bodies with little to no atmosphere. Due to the lack of an atmosphere to retain heat, Moho and Mercury are freezing on the night side and, relative to Earth, extremely hot on the day side. Both planets are also the closest to their respective stars, share a similar orbital eccentricity and lack natural satellites.
  
*[http://en.wikipedia.org/wiki/Argument_of_periapsis Argument of Periapsis]: 85° 
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However, Moho has a brown surface, while Mercury has a dark grey surface. In addition, Mercury has a tenuous atmosphere of about 10⁻¹³ kPa while Moho has no atmosphere; although, a pressure of 10⁻¹³ kPa (≃ 10⁻¹⁵ atm) would be rendered "unmeasurable" by the [[PresMat Barometer]] and register in KSP as a vacuum. However, Moho did have a super-heated atmosphere up until 0.18
  
*[http://en.wikipedia.org/wiki/Mean_anomaly Mean Anomaly] at [http://en.wikipedia.org/wiki/Epoch_(astronomy) Epoch] UT = ...
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== Gallery ==
 +
<gallery>
 +
Moho_800_map.gif | A topographic height map of Moho as at Version 0.18.2 made with the ISA MapSat plugin.
 +
Moho_landing.png | A successful landing at Moho pre-0.18. Note the engines still overheating.
 +
Moho Landing 0.23.5.png | A successful landing in 0.23.5, after Moho's color was changed and its superheated atmosphere was removed. The walls of the basins are quite steep.
 +
Probewedge.jpg | A probe wedged in the 5&nbsp;km deep lava well at the north pole.
 +
Moho_flyby.png | A probe performing a Moho flyby.
 +
HannyNMohole.png | Hanny Kerman wedged in the Northern [[Mohole]] sideways. Lots of orientation jittering was observed.
 +
EnteringMohoOrbit.png | A spacecraft carrying a probe decelerates to enter into orbit around Moho. Vessels pick up a lot of speed approaching this inner planet.
 +
</gallery>
  
*[http://en.wikipedia.org/wiki/Orbital_period Orbital Period]: 616.531673664 hours, or 25.688819736 [http://en.wikipedia.org/wiki/Earth Earth] days
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== Changes ==
 
+
;[[0.90]]
*[http://en.wikipedia.org/wiki/Sphere_of_influence_%28astrodynamics%29 Sphere of influence]: 24,995 km
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* Added biomes
 
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;[[0.21]]
== Topography ==
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*New, procedurally generated, textures added, with higher detail craters.
The surface is very mountainous, with surprisingly few craters. The crust almost looks fractured. Up close it is much redder than in the map view and has many white dots.
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;[[0.18]]
 
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* Entirely changed more cratered surface.
== Atmosphere ==
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* Color changed from red to brown.
Moho has a very thin, very hot atmosphere that poses a heat threat to most or all rocket motors. It extends to ~28 km altitude.
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* No more superheated atmosphere.
 
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* No longer tidally locked.  
== Natural Satellites ==
+
* Mass reduced.
 
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;[[0.17]]
Moho has no natural satellites.
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* Initial Release
 
 
== Reference Frames ==
 
{| class="wikitable"
 
!
 
! Paid (0.17)
 
|-
 
!Rotational/Inertial transition
 
| ? m
 
|-
 
!Warp
 
!colspan="2"|Minimum Altitude
 
|-
 
| 1x
 
| ? m
 
|-
 
| 2x
 
| ? m
 
|-
 
| 5x
 
| ? m
 
|-
 
| 10x
 
| ? m
 
|-
 
| 50x
 
| 50,000 m
 
|-
 
| 100x
 
| 100,000 m
 
|-
 
| 1000x
 
| 200,000 m
 
|-
 
| 10000x
 
| 300,000 m
 
|}
 
  
== See Also ==
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== Notes ==
* [[Universe]]
+
<references />
* [[Star]]
 
* [[Moon]]
 
* [[Asteroid]]
 
  
 
{{Celestial Bodies}}
 
{{Celestial Bodies}}
 
[[Category:Celestials]]
 
[[Category:Celestials]]
 
[[Category:Planets]]
 
[[Category:Planets]]

Revision as of 20:53, 21 June 2018

Moho
Moho
Moho as seen from orbit.
Planet of Kerbol
Orbital Characteristics
Semi-major axis 5 263 138 304 m [Note 1]
Apoapsis 6 315 765 981 m [Note 1]
Periapsis 4 210 510 628 m [Note 1]
Orbital eccentricity 0.2
Orbital inclination 7 °
Argument of periapsis 15 °
Longitude of the ascending node 70 °
Mean anomaly 3.14 rad (at 0s UT)
Sidereal orbital period 2 215 754 s
102 d 3 h 29 m 14.2 s
Synodic orbital period 2 918 346.4 s
Orbital velocity 12 186 - 18 279 m/s
Physical Characteristics
Equatorial radius 250 000 m
Equatorial circumference 1 570 796 m
Surface area 7.8539816×1011 m2
Mass 2.5263314×1021 kg
Standard gravitational parameter 1.6860938×1011 m3/s2
Density 38 599.500 kg/m3
Surface gravity 2.70 m/s2 (0.275 g)
Escape velocity 1 161.41 m/s
Sidereal rotation period 1 210 000.0 s
56 d 0 h 6 m 40 s
Solar day 2 665 723.4 s
123 d 2 h 28 m 43.4 s
Sidereal rotational velocity 1.2982 m/s
Synchronous orbit 18 173.17 km
Sphere of influence 9 646 663.0 m [Note 1]
Atmospheric Characteristics
Atmosphere present No
Scientific multiplier
Surface 10
Splashed N/A
Near space 8
Outer space 7
Recovery 7

  1. 1.0 1.1 1.2 1.3 The distances are given from the body's center, not from the surface (unlike ingame)

Moho is the third-smallest planet and the one closest to Kerbol, with an orbital period of 102 days, the shortest in the Kerbol system, and an orbital velocity ranging from 12-18km/s, is also the fastest celestial body in Kerbal Space Program. It is the Mercury analogue. Moho lacks an atmosphere and natural satellites. The planet gets its name from the Mohorovičić discontinuity, the boundary between the Earth's crust and mantle.

Moho's inclined, low, and eccentric orbit and lack of atmosphere or moons (for aerobraking and gravity assists, respectively) make encountering the planet relatively difficult. Without an atmosphere to retain or block heat, Moho's daytime surface temperatures can exceed 300°C, making radiators an absolute necessity if any part (such as drills or engines) must be cool to operate both safely and effectively. Moho rotates very slowly, its solar day being over 100 times longer than Kerbin's, which means that reconnaissance satellites will likely wait a long time between targets, but it also means that there may be several opportunities to perform individual measurements across multiple orbits. Although Moho's close proximity to the sun increases solar panel output to 10.4x that of Kerbin's at periapsis, excessive heat can cause cooling issues for mining operations and the extremely long nights will necessitate bringing an alternative power source (RTGs or fuel cells) for extended surface operations.

In-game Description

Moho figures in Kerbal mythology as a fiery place with oceans of flowing lava. In reality however, it’s much less interesting.


Scientists speculate about possible ways to make it “awesome like in the stories”. Some of those ideas have led to new breakthroughs in aerospace technology.''

Kerbal Astronomical Society

Topography

Moho's surface ranges from light brown highlands to dark brown basaltic basins and a large depression called the Northern Sinkhole near the North pole (not to be confused with the Mohole)-these features, together with surface reports, strongly evidence the presence of past volcanism. Its highest point is in its northern hemisphere at an altitude of 6817 m. Moho's heavily eroded surface and lack of ground scatter despite there being no atmosphere suggest active space weathering processes.

Moho has a very deep well at its geographic north pole, called the Mohole. The Mohole is about 4.6 kilometers deep, and has a descending angle of 80 degrees. [1] The hole is a glitch in the procedural generation of terrain; many other bodies with land at the north pole have similar bugs.[2] Despite the appearance of another hole at the geographic south pole in Map View, one does not exist.

The Mohole can destroy craft and kill Kerbals that fall into it.

Biomes

Moho has 12 biomes. It is one of three bodies (the other being Kerbin and Ike) that have their own North and South Pole biomes. It is dotted with Minor Craters and features four distinct Lowland Biomes. The Mohole is registered as part of the South pole despite being at the North pole.

Biome list

Moho In-game biome map as of 1.2
  • North Pole
  • Northern Sinkhole Ridge
  • Northern Sinkhole
  • Highlands
  • Midlands
  • Minor Craters
  • Central Lowlands
  • Western Lowlands
  • South Western Lowlands
  • South Eastern Lowlands
  • Canyon
  • South Pole

Orbital Statistics

Mohosynchronous and semi-synchronous orbits are impossible — they would require altitudes of 18 182.08 km and 11 361.48 km respectively, both of which are beyond Moho's sphere of influence.

Reference Frames

Time warp Minimum Altitude
Any
5× 10 000 m
10× 10 000 m
50× 30 000 m
100× 50 000 m
1 000× 100 000 m
10 000× 200 000 m
100 000× 300 000 m

Solar System Counterpart

Moho is the apparent Kerbol System analog of the planet Mercury. Both share a similar cratered landscape, like most bodies with little to no atmosphere. Due to the lack of an atmosphere to retain heat, Moho and Mercury are freezing on the night side and, relative to Earth, extremely hot on the day side. Both planets are also the closest to their respective stars, share a similar orbital eccentricity and lack natural satellites.

However, Moho has a brown surface, while Mercury has a dark grey surface. In addition, Mercury has a tenuous atmosphere of about 10⁻¹³ kPa while Moho has no atmosphere; although, a pressure of 10⁻¹³ kPa (≃ 10⁻¹⁵ atm) would be rendered "unmeasurable" by the PresMat Barometer and register in KSP as a vacuum. However, Moho did have a super-heated atmosphere up until 0.18

Gallery

Changes

0.90
  • Added biomes
0.21
  • New, procedurally generated, textures added, with higher detail craters.
0.18
  • Entirely changed more cratered surface.
  • Color changed from red to brown.
  • No more superheated atmosphere.
  • No longer tidally locked.
  • Mass reduced.
0.17
  • Initial Release

Notes

  1. Moho's Secrets Revealed
  2. https://www.youtube.com/watch?v=-e5SGynBJ4Y