Difference between revisions of "Gilly"

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−	{{:Gilly/Data}}	+	{{Infobox/Body}}
−	'''Gilly''' is a tiny asteroid, the only [[w:natural satellite|natural satellite]] of [[Eve]], and the smallest celestial body in the [[Kerbol]] system. Landing on Gilly is challenging due to its very low mass, steep slopes, and highly eccentric orbit, making it very easy to overthrust engines or send a spacecraft tumbling.  Gilly's odd shape and fast rotation give the surface near the peaks an apparent velocity near 5 m/s. The [[navball]] of a lander securely parked on the surface may still display "Orbit" and a small non-zero lateral speed. To prevent tumbling upon landing, the final velocity trim may need to be performed by eye.	+	'''Gilly''' is a tiny asteroid, the only [[w:natural satellite|natural satellite]] of [[Eve]], and the smallest celestial body in the [[Kerbol]] system.
−	Escaping Gilly is much easier — the [[EVA]] jetpack can easily put a lone Kerbal into orbit or set him on an escape trajectory. In fact, it's possible to deploy a Kerbal from a spacecraft in orbit around Gilly, send him down to the surface, and land him without using any other fuel source. Albeit with some difficulty due to the lack of a navball, the Kerbal can even return to orbit, rendezvous with the spacecraft, and still have just a bit less than 50% pack fuel left.	+	== In-game Description ==
−	Gilly has the least gravity of all bodies in the Kerbol system, with half of that possessed by Jool's moon Pol, due to its extremely low mass and small size. A Kerbal can jump over 1000 meters on this moon. Gilly's gravity makes it ideal for very low fuel interplanetary missions; however, its eccentric and inclined orbit may make encounters more difficult and fuel-costly.	+	'''KSP 1:'''
		+	{{Quote
		+	|Gilly is a lumpy rock wandering around the orbit of Eve. It’s by far the smallest natural satellite that the Kerbal Astronomical Society has discovered.<br />
		+	<br />
		+	''Due to the large amount of squinting and eye strain associated with its discovery, wearing glasses has now become synonymous with being an accomplished Astronomer.''
		+	|[[Kerbal Astronomical Society]]}}
−	An unplanned encounter with Gilly is unlikely when approaching Eve, even if player's trajectory is near the plane of Gilly's orbit. This is because Gilly's mass is very small relative to Eve's mass, resulting in a very small sphere of influence compared to the semi-major axis of its orbit. In fact, no other moon in the game has a smaller mass ratio.<!-- soi-sma ratio is basically the same as the mass ratio: soi/sma = (sma*(m/M)^(2/5))/sma = (m/M)^(2/5) -->	+	'''KSP 2:'''
		+	{{Quote
		+	|Gilly is the smallest celestial body in the Kerbollar system. In fact, it took years to officially discover because researches mistook it for a crumb on their telescope lenses. Its gentle gravitational pull and lack of atmosphere often leads to objects bouncing off its surface and back into orbit around Eve. Please be cautious when taking brisk walks.|}}
−	Gilly was once even more dangerous to land on due to a clipping bug with the [[w:polygon mesh|collision mesh]]. This problem was fixed in {{version|0.17.1}}.	+	== Topography ==
		+	[[File:Gilly ISA Topo.png|thumb|left|A topographic map of Gilly.]]The surface of Gilly is extremely dynamic and uneven, with many steep slopes and smooth areas. This moon is considered a [[captured asteroid]]. Gilly has the lowest mass and gravitational force of any body in the [[Kerbol]] system. Due to its minuscule mass and resultant low gravitational force, it does not have an atmosphere.
		+
		+	Gilly's color might come from a high content of solid carbon. When terrain scatters are enabled in the settings menu, small rocks will show up on the surface.
		+
		+	== Biomes ==
		+	With only 3 [[biome]]s, Gilly has the fewest number of biomes in the [[Kerbol System]].
		+
		+	=== Biome list ===
		+	{|
		+	| style="vertical-align:middle; text-align:center;" |
		+	[[File:GillyBiomeMap.png|thumb|687px|left|Gilly's biomes as of 1.12 (made with Scansat, hand-colored)]]
		+	|}
		+
		+	== KSP2 ==
		+	=== Surface Research Locations ===
		+
		+	Surface research locations include:
		+
		+	* Lowlands
		+	* Highlands
		+	* Midlands
		+	* Oblique Impact Site
		+	* Silicate Fields
		+
		+	=== Maps ===
		+	==== Biomes ====
		+	[[File:gilly_region_ui.jpg|thumb|none|Gilly biome map with legend (as of v0.2.1.0 (from Orbital Survay mod))]]
		+	[https://i.imgur.com/Nydo6T0.jpeg Gilly biome map (Imgur)]
−	== Topography ==	+	Gilly currently has 5 [[biome]]s
−	[[File:Gilly ISA Topo.png|thumb|left|A topographic map of Gilly.]]The surface of Gilly is extremely dynamic and uneven, with many steep slopes and smooth areas. This moon is considered a [[captured asteroid]]. Gilly has the lowest mass and gravitational force of any body in the [[Kerbol]] system. Due to its minuscule mass and gravitational force, it does not have an atmosphere.	+	* Highlands
		+	* Lowlands
		+	* Midlands
		+	* Oblique Impact Site
		+	* Silicate Fields
−	Gilly's color might come from a high content of solid carbon. When terrain scatters are enabled in the settings menu, small rocks show up on the surface.	+	==== Visual map ====
		+	[[File:gilly_visual.png|thumb|none|Gilly visual map (as of v0.2.1.0)]]
		+	[https://i.imgur.com/ZLauk18.png Gilly visual map (Imgur)]
	== Gravity ==		== Gravity ==
−	The gravity of Gilly is extremely low, with only 0.5% of [[Kerbin]]'s surface gravity. Because of this, it is very impractical to walk on Gilly; each step will launch a Kerbal several meters into the air, and a jumping Kerbal will usually take around 200 seconds to return to the surface. This makes jetpacks a necessity to move around the moon practically.  The low gravity also makes it very difficult to get into an encounter since it makes the sphere of influence so miniscule. On the other hand, starting a craft is very easy to accomplish as they weigh <!-- weigh(t) ≠ mass --> far less than usual.	+	Gilly has the lowest gravity of all bodies in the [[Kerbol]] system at only 0.5% of [[Kerbin]]'s surface gravity, which is half that of Jool's moon [[Pol]]. It is very impractical to walk on Gilly; each step will launch a Kerbal several meters into the air. A Kerbal can jump over 200 meters on this moon and will usually take more than 4 minutes to return to the surface. This makes jetpacks a necessity to move around the moon practically.
−	Landing's difficulty is ambiguous and mixed - a major pro is that you don't need to do much to slow down to land safely, but the con is that due to Gilly's extremely low gravity, landing can be actually challenging, because of the lack of any "grip" (you can easily bounce off the terrain), extremely uneven terrain and relatively fast rotation (when compared to its' size) of the satellite ([[navball]] indications are simply fallacious and it is adviced to actually keep the prograde tilted a little bit sideways to counter the [[w:Coriolis effect|Coriolis effect]] if you are landing close to the equator). It is adviced to be adept in manually using RCS thrusters and to have SAS active on the lander.	+	The very low gravity also makes it very difficult to get into an encounter since it makes the sphere of influence so minuscule. An unplanned encounter with Gilly is unlikely when approaching Eve, even if the craft's trajectory is near the plane of Gilly's orbit.  Because of this, it is easier to encounter Gilly by approaching it in a rendezvous fashion rather than attempting to intercept it with a single injection maneuver, like one would use to get from LKO to the Mun.
		+
		+	Gilly's mass is very small relative to Eve's mass, resulting in a very small sphere of influence compared to the semi-major axis of its orbit. In fact, no other moon in the game has a smaller mass ratio.
		+
		+	Gilly's gravity makes it ideal for very low fuel interplanetary missions; however, its eccentric and inclined orbit may make encounters more difficult and fuel-costly.  Landing, however, is extremely fuel-friendly:  it is trivial to land on Gilly and return to orbit spending much less than 100 m/s of delta-v, though fine throttle controls are a necessity during the landing phase to avoid reversing your descent.
		+
		+	The low gravity of this moon makes it an ideal location for mining ore. Even an extremely overloaded lander with a minuscule TWR will be able to return to orbit from the surface. A tanker could use a gravity assist off of Eve to slingshot into an encounter with Kerbin or Duna (made easier by the rapidity with which the transfer windows repeat, due to Eve's fast orbit), and either return the ore to Kerbin's surface for credits, or refuel another ship/refueling station in orbit.
		+
		+	== Landing ==
		+	Landing on Gilly is challenging due to its very low mass, steep slopes, and highly eccentric orbit, making it very easy to overthrust engines or send a spacecraft tumbling.  Gilly's odd shape and fast rotation give the surface near the peaks an apparent velocity near 5&nbsp;m/s. Some players advise to keep the prograde on the [[navball]] tilted a little bit sideways to counter the [[w:Coriolis effect|Coriolis effect]] if you are landing close to the equator. To prevent tumbling upon landing, the final velocity trim may need to be performed by eye. It is advised to be adept in manually using RCS thrusters and to have SAS active on the lander. If your lander tips over, you can use reaction wheels to put it back upright due to Gilly's very, very low gravity. Time Warp can also be used to stabilize a lander, as vessels tip over so slowly on Gilly the game considers them stable enough to allow time warp.
		+
		+	Gilly was once even more dangerous to land on due to a clipping bug with the [[w:polygon mesh|collision mesh]]. This problem was fixed in {{version|0.17.1}}.
		+
		+	Escaping Gilly is much easier &mdash; the [[EVA]] jetpack can easily put a lone Kerbal into orbit or set them on an escape trajectory. In fact, it's possible to deploy a Kerbal from a spacecraft in orbit around Gilly, send them down to the surface, and land them without using any other fuel source. The Kerbal can even return to orbit, rendezvous with the spacecraft, and still have up to 3.5 units of EVA fuel left.
	== Reference Frames ==		== Reference Frames ==
−	{{:Gilly/RefFrames}}	+	{{:Gilly/RefFrame}}
	== Gallery ==		== Gallery ==
	<gallery>		<gallery>
−	GillyLanding.png  | An unsuccessful touchdown attempt in 0.17. Note the landing legs clipping through terrain.	+	GillyLanding.png  | An unsuccessful touchdown attempt in 0.17. Notice the landing legs clipping through the terrain.
	Gilly ISA Topo.png | Topographical image of Gilly.		Gilly ISA Topo.png | Topographical image of Gilly.
−	screenshot123.png  | A successful [[EVA]] landing.	+	Kerbal on Gilly's surface.png  | A successful [[EVA]] landing.
	Gilly_map_800.gif  | A topographic height map of Gilly as of Version 0.18.2. Made with the ISA MapSat plugin.		Gilly_map_800.gif  | A topographic height map of Gilly as of Version 0.18.2. Made with the ISA MapSat plugin.
	Gilly_Probe.png    | A successful probe landing. Small rocks are visible on the surface in the background.		Gilly_Probe.png    | A successful probe landing. Small rocks are visible on the surface in the background.
−	Landed on gilly.png| A successful scientific, electrically powered probe landed on Gilly. The probe's small mass combined with Gilly's low gravity makes ionic engines feasible, as shown here.	+	Landed on gilly.png| A successful scientific, electrically powered probe landed on Gilly. The probe's small mass combined with Gilly's low gravity makes ion engines suitable for landing, as shown here.
−	Gilly Fuel Check.png | Successful EVA landing with a fuel check to show usage.	+	gillygilly.png|Kerbals celebrate their first manned voyage to Gilly. (They celebrated even more when they got home.)
−	Gilly Orbital Rendezvous.png | Return to Gilly orbit and the spacecraft via EVA.	+	File:Contract Obligation Outpost.jpeg|thumb|A space station in orbit of Gilly, where Eve can be seen in the background.(The Eve texture is provided by scatterer, and is not stock/default, but the high-resolution Gilly surface textures are.)
−	Short Final for Rendezvous.png | A successful, if rushed, rendezvous with the orbiting spacecraft with just an EVA pack and some pluck.
−	Final Fuel Check.png | If done right, one could probably land, take off, and rendezvous with an orbiting spacecraft with over 3 units of monoprop.
	</gallery>		</gallery>
		+
		+	== Trivia ==
		+	-Though Venus in real life dosn't have any moons, Gilly is very similar in mass and size to [[w:Phobos (moon)|Phobos]]
	== Changes ==		== Changes ==
−	;{{Version|0.17.1|}}	+	;[[0.90]]
		+	* Added biomes
		+	;[[0.17.1]]
	* Fixed terrain collision detection issues.		* Fixed terrain collision detection issues.
−	;{{Version|0.17|}}	+	;[[0.17]]
	* Initial Release		* Initial Release

---

Latest revision as of 22:18, 10 May 2024

Gilly is a tiny asteroid, the only natural satellite of Eve, and the smallest celestial body in the Kerbol system.

In-game Description

KSP 1:

“

Gilly is a lumpy rock wandering around the orbit of Eve. It’s by far the smallest natural satellite that the Kerbal Astronomical Society has discovered. Due to the large amount of squinting and eye strain associated with its discovery, wearing glasses has now become synonymous with being an accomplished Astronomer.'' — Kerbal Astronomical Society

”

KSP 2:

“

Gilly is the smallest celestial body in the Kerbollar system. In fact, it took years to officially discover because researches mistook it for a crumb on their telescope lenses. Its gentle gravitational pull and lack of atmosphere often leads to objects bouncing off its surface and back into orbit around Eve. Please be cautious when taking brisk walks.

”

Topography

The surface of Gilly is extremely dynamic and uneven, with many steep slopes and smooth areas. This moon is considered a captured asteroid. Gilly has the lowest mass and gravitational force of any body in the Kerbol system. Due to its minuscule mass and resultant low gravitational force, it does not have an atmosphere.

Gilly's color might come from a high content of solid carbon. When terrain scatters are enabled in the settings menu, small rocks will show up on the surface.

Biomes

With only 3 biomes, Gilly has the fewest number of biomes in the Kerbol System.

Biome list

Gilly's biomes as of 1.12 (made with Scansat, hand-colored)

KSP2

Surface Research Locations

Surface research locations include:

• Lowlands
• Highlands
• Midlands
• Oblique Impact Site
• Silicate Fields

Maps

Biomes

Gilly biome map (Imgur)

Gilly currently has 5 biomes

• Highlands
• Lowlands
• Midlands
• Oblique Impact Site
• Silicate Fields

Visual map

Gilly visual map (Imgur)

Gravity

Gilly has the lowest gravity of all bodies in the Kerbol system at only 0.5% of Kerbin's surface gravity, which is half that of Jool's moon Pol. It is very impractical to walk on Gilly; each step will launch a Kerbal several meters into the air. A Kerbal can jump over 200 meters on this moon and will usually take more than 4 minutes to return to the surface. This makes jetpacks a necessity to move around the moon practically.

The very low gravity also makes it very difficult to get into an encounter since it makes the sphere of influence so minuscule. An unplanned encounter with Gilly is unlikely when approaching Eve, even if the craft's trajectory is near the plane of Gilly's orbit. Because of this, it is easier to encounter Gilly by approaching it in a rendezvous fashion rather than attempting to intercept it with a single injection maneuver, like one would use to get from LKO to the Mun.

Gilly's mass is very small relative to Eve's mass, resulting in a very small sphere of influence compared to the semi-major axis of its orbit. In fact, no other moon in the game has a smaller mass ratio.

Gilly's gravity makes it ideal for very low fuel interplanetary missions; however, its eccentric and inclined orbit may make encounters more difficult and fuel-costly. Landing, however, is extremely fuel-friendly: it is trivial to land on Gilly and return to orbit spending much less than 100 m/s of delta-v, though fine throttle controls are a necessity during the landing phase to avoid reversing your descent.

The low gravity of this moon makes it an ideal location for mining ore. Even an extremely overloaded lander with a minuscule TWR will be able to return to orbit from the surface. A tanker could use a gravity assist off of Eve to slingshot into an encounter with Kerbin or Duna (made easier by the rapidity with which the transfer windows repeat, due to Eve's fast orbit), and either return the ore to Kerbin's surface for credits, or refuel another ship/refueling station in orbit.

Landing

Landing on Gilly is challenging due to its very low mass, steep slopes, and highly eccentric orbit, making it very easy to overthrust engines or send a spacecraft tumbling. Gilly's odd shape and fast rotation give the surface near the peaks an apparent velocity near 5 m/s. Some players advise to keep the prograde on the navball tilted a little bit sideways to counter the Coriolis effect if you are landing close to the equator. To prevent tumbling upon landing, the final velocity trim may need to be performed by eye. It is advised to be adept in manually using RCS thrusters and to have SAS active on the lander. If your lander tips over, you can use reaction wheels to put it back upright due to Gilly's very, very low gravity. Time Warp can also be used to stabilize a lander, as vessels tip over so slowly on Gilly the game considers them stable enough to allow time warp.

Gilly was once even more dangerous to land on due to a clipping bug with the collision mesh. This problem was fixed in version 0.17.1.

Escaping Gilly is much easier — the EVA jetpack can easily put a lone Kerbal into orbit or set them on an escape trajectory. In fact, it's possible to deploy a Kerbal from a spacecraft in orbit around Gilly, send them down to the surface, and land them without using any other fuel source. The Kerbal can even return to orbit, rendezvous with the spacecraft, and still have up to 3.5 units of EVA fuel left.

Reference Frames

Time warp	Minimum Altitude
1×	Any
5×	8 000 m
10×	8 000 m
50×	8 000 m
100×	20 000 m
1 000×	40 000 m
10 000×	80 000 m
100 000×	100 000 m

Gallery

• 

  An unsuccessful touchdown attempt in 0.17. Notice the landing legs clipping through the terrain.

• 

  Topographical image of Gilly.

• 

  A successful EVA landing.

• 

  A topographic height map of Gilly as of Version 0.18.2. Made with the ISA MapSat plugin.

• 

  A successful probe landing. Small rocks are visible on the surface in the background.

• 

  A successful scientific, electrically powered probe landed on Gilly. The probe's small mass combined with Gilly's low gravity makes ion engines suitable for landing, as shown here.

• 

  Kerbals celebrate their first manned voyage to Gilly. (They celebrated even more when they got home.)

• 

  A space station in orbit of Gilly, where Eve can be seen in the background.(The Eve texture is provided by scatterer, and is not stock/default, but the high-resolution Gilly surface textures are.)

Trivia

-Though Venus in real life dosn't have any moons, Gilly is very similar in mass and size to Phobos

Changes

0.90

• Added biomes

0.17.1

• Fixed terrain collision detection issues.

0.17

• Initial Release

v t e Kerbol System Kerbol Moho Eve Kerbin Duna Dres Jool Eeloo (The Sun)   Gilly Mun Minmus Ike   Laythe Vall Tylo Bop Pol