Difference between revisions of "Asteroid"

From Kerbal Space Program Wiki
Jump to: navigation, search
(section about capturing asteroids)
m
 
(45 intermediate revisions by 30 users not shown)
Line 1: Line 1:
 
[[File:E-Class-Asteroid.png|thumb|An E class asteroid]]
 
[[File:E-Class-Asteroid.png|thumb|An E class asteroid]]
An '''asteroid''' is a randomly created [[celestial body]] with sizes between 3 and 30 meters.
+
An '''asteroid''' is a randomly created [[celestial body]] usually in orbit around [[Kerbol]] or [[Dres]]. Asteroids appear and disappear frequently so that there are always a few scattered around the vicinity of [[Kerbin]]. Asteroids first appeared in the game with the release of the [[Asteroid Redirect Mission]] update, or 0.23.5.  
  
This is the first type of celestial body that is not on rails to change their orbits. This means that they can be captured by other bodies or collide with them. The current [[Kerbol System]] is designed to prevent any SOI change which would disturb their orbit. Unlike the other celestial bodies, asteroids are too light to have any gravity. This makes them more like a non-player created [[craft]]. But they need to be discovered and monitored with the [[Tracking Station]]. They come in various classes from class A (tiny) to class E (Huge). Asteroids can be white, black and grey and come in random shapes.  
+
Asteroids can be found and monitored via the tracking station and come in various sizes, ranging from class A (at most 3 meters across and weighing tens of tons) to class E (at least 30 meters across and weighing thousands of tons). Their coloration ranges from light to dark grey, with patches of black and white dispersed over the surface.
  
Asteroids should not be confused with [[captured asteroid]]s, as they are on rails and have gravity.
+
Unlike the true [[celestial body|celestial bodies]] in the game, asteroids are fully under control of the physics system. They can be rotated or accelerated by the application of torque or thrust, and moved into a different orbit or another body's [[sphere of influence]] with correct maneuvering. They do not have SOIs of their own or produce gravity to affect nearby objects; they may not be landed on by [[craft]], stood on by [[kerbal]]s on [[EVA]], or have [[Extend-o-matic Series A1 Deployable Flag|flag]]s planted on them, but may be [[docking|docked]] with through the use of the [[Advanced Grabbing Unit]].
 +
 
 +
Asteroids are procedurally generated; each new one is a unique shape and size. The part configuration file used as a prototype for each procedurally-generated asteroid can be found in <tt style="white-space:nowrap;">[[GameData]]/Squad/[[Parts/Misc/PotatoRoid/part.cfg]]</tt>. It is a C class asteroid that can be attached to any spacecraft after editing the part's config file, allowing it to be under any part category entered.
 +
 
 +
Some celestial bodies such as [[Gilly]] are often referred to as [[captured asteroid]]s; this is merely an astronomical classification as they are not fundamentally different from the larger moons and planets in the way that asteroids are.
  
 
== Capturing asteroids ==
 
== Capturing asteroids ==
It is possible to rendezvous with an asteroid and attach to it with an [[Advanced Grabbing Unit]]. The craft can then use its engines to alter the orbit of the asteroid. This can be used to get it into a stable orbit around Kerbin or another celestial body and even land it.
+
Once an asteroid is captured with the [[Advanced Grabbing Unit]], it is considered part of the ship. It can be renamed when docked, and/or the craft can then use its engines to alter its orbit. This can be used to get it into a stable orbit around [[Kerbin]] or another celestial body, or even drop it into the atmosphere and land it. Capturing an Asteroid requires a procedure similar to [[docking]].
 +
 
 +
The rendezvous is identical to the usual docking- the asteroid is targeted and orbits are matched. Asteroids are frequently found on hyperbolic escape trajectories when encountered within [[Kerbin]]'s [[SOI]], which can make the [[map view]] more difficult to use to plan an encounter. On close approach instead of targeting a specific docking port the [[center of mass]] of the asteroid may be targeted, and the Advanced Grabbing Unit attached to the asteroid's surface at any point. Perfect accuracy is not crucial because the Advanced Grabbing Unit can be tilted after contact to align the craft's thrust with center of mass.
 +
 
 +
The asteroid's mass can be estimated with the following formula, obtained experimentally. This is only an estimate as the masses of asteroids even within the same size class varies significantly.
 +
{{Formula|math=M=e^{1.5 \cdot x}|where=* <math>M</math> is the mass in tonnes
 +
* <math>x</math> is the class (A = 1 and E = 5)}}. Assuming a range of ±0.5 for <math>x</math> gives the following approximate ranges for each class:
 +
* A: 2.1 ~ 9.5 tons
 +
* B: 9.5 ~ 42.5 tons
 +
* C: 42.5 ~ 190.6 tons
 +
* D: 190.6 ~ 854 tons
 +
* E: 854 ~ 3,828 tons
  
== Science ==
+
=== Science ===
Currently only samples can be taken from each asteroid yielding 60 [[Science]]. However, different samples can be collected from the same asteroid in different situations, like high orbit, low orbits, atmosphere and even in different biomes when the asteroid is landed on a celestial body.
+
Kerbals who fly close to an asteroid during an EVA can take a sample to earn a maximum of 70 [[Science]] from each asteroid. Asteroids may be sampled from different [[science#Situations|situation]]s or even different biomes when the asteroid is landed on a celestial body.
  
== Asteroid Redirect Mission ==
+
=== Uses ===
Along with asteroids, the official [[Asteroid Redirect Mission]] has been released containing a mission to tug an asteroid into [[Kerbin]] orbit to investigate it. The asteroids are lightweight and not on rails to allow their orbit to be altered. It is believed (unconfirmed) that the asteroids are parts, as opposed to celestial bodies.
+
* Capturing an asteroid is a critical part of the [[Asteroid Redirect Mission]] scenario, in which an asteroid is on course to impact [[Kerbin]] and must be deflected.
 +
* Asteroids are also a good source of [[science]], since each new encounter yields additional data.
 +
* Some [[contract]]s require you to capture a particular class of asteroid and put it in orbit around certain bodies or eject it from the solar system.
 +
* Once captured into a stable orbit, asteroids can be converted into [[space station]]s by attaching suitable parts to them with additional [[Advanced Grabbing Unit|claw]]s.
 +
* Asteroids can be mined for [[ore]], which can be converted into various fuel types for ships.
 +
* Destroying buildings at the [[KSC]] for fun.
  
 
== Gallery ==
 
== Gallery ==
<gallery><!-- please in alphabetical order -->
+
<gallery><!-- please in alphabetical order of the classes -->
 
File:AsteroidLanding.png|An A-class asteroid landing on Kerbin
 
File:AsteroidLanding.png|An A-class asteroid landing on Kerbin
 +
File:A class asteroid.jpg|An A-Class asteroid with multiple probes attached over Kerbin
 
File:C-class asteroid.png|A C-class asteroid
 
File:C-class asteroid.png|A C-class asteroid
 
File:Asteroid-atmosphere.jpg|A D-class asteroid (with a probe attached) entering Kerbins atmosphere
 
File:Asteroid-atmosphere.jpg|A D-class asteroid (with a probe attached) entering Kerbins atmosphere
 +
File:D class asteroid landed.jpg|A D-Class asteroid landed on Kerbin
 +
File:ClassEAsteroidBeingMined.PNG|A E-Class asteroid being mined on Kerbin
 +
File:NewMagicBoulder.jpg|A Magic Boulder asteroid.
 
</gallery>
 
</gallery>
 +
 +
== Changes ==
 +
;[[1.5]]
 +
* Asteroids now sink instead of float
 +
;[[1.0]]
 +
* Asteroids can now be mined for [[Ore]]
 +
* Asteroids now also orbit near [[Dres]]
 +
;[[0.23.5]]
 +
* Initial release
  
 
== See also ==
 
== See also ==
Line 28: Line 61:
 
* “[http://www.twitch.tv/ksptv/b/501587795?t=19m40s KSP-TV: Squadcast, back and later than ever!]” interview of HarvesteR by Maxmaps (19:40)
 
* “[http://www.twitch.tv/ksptv/b/501587795?t=19m40s KSP-TV: Squadcast, back and later than ever!]” interview of HarvesteR by Maxmaps (19:40)
 
* [[article:265|“Asteroid Redirect Mission - The FAQ”]] by Rowsdower released on March 14<sup>th</sup>
 
* [[article:265|“Asteroid Redirect Mission - The FAQ”]] by Rowsdower released on March 14<sup>th</sup>
 +
 +
[[Category:Celestials]]

Latest revision as of 11:44, 25 May 2019

An E class asteroid

An asteroid is a randomly created celestial body usually in orbit around Kerbol or Dres. Asteroids appear and disappear frequently so that there are always a few scattered around the vicinity of Kerbin. Asteroids first appeared in the game with the release of the Asteroid Redirect Mission update, or 0.23.5.

Asteroids can be found and monitored via the tracking station and come in various sizes, ranging from class A (at most 3 meters across and weighing tens of tons) to class E (at least 30 meters across and weighing thousands of tons). Their coloration ranges from light to dark grey, with patches of black and white dispersed over the surface.

Unlike the true celestial bodies in the game, asteroids are fully under control of the physics system. They can be rotated or accelerated by the application of torque or thrust, and moved into a different orbit or another body's sphere of influence with correct maneuvering. They do not have SOIs of their own or produce gravity to affect nearby objects; they may not be landed on by craft, stood on by kerbals on EVA, or have flags planted on them, but may be docked with through the use of the Advanced Grabbing Unit.

Asteroids are procedurally generated; each new one is a unique shape and size. The part configuration file used as a prototype for each procedurally-generated asteroid can be found in GameData/Squad/Parts/Misc/PotatoRoid/part.cfg. It is a C class asteroid that can be attached to any spacecraft after editing the part's config file, allowing it to be under any part category entered.

Some celestial bodies such as Gilly are often referred to as captured asteroids; this is merely an astronomical classification as they are not fundamentally different from the larger moons and planets in the way that asteroids are.

Capturing asteroids

Once an asteroid is captured with the Advanced Grabbing Unit, it is considered part of the ship. It can be renamed when docked, and/or the craft can then use its engines to alter its orbit. This can be used to get it into a stable orbit around Kerbin or another celestial body, or even drop it into the atmosphere and land it. Capturing an Asteroid requires a procedure similar to docking.

The rendezvous is identical to the usual docking- the asteroid is targeted and orbits are matched. Asteroids are frequently found on hyperbolic escape trajectories when encountered within Kerbin's SOI, which can make the map view more difficult to use to plan an encounter. On close approach instead of targeting a specific docking port the center of mass of the asteroid may be targeted, and the Advanced Grabbing Unit attached to the asteroid's surface at any point. Perfect accuracy is not crucial because the Advanced Grabbing Unit can be tilted after contact to align the craft's thrust with center of mass.

The asteroid's mass can be estimated with the following formula, obtained experimentally. This is only an estimate as the masses of asteroids even within the same size class varies significantly.

Where:
  • is the mass in tonnes
  • is the class (A = 1 and E = 5)
. Assuming a range of ±0.5 for gives the following approximate ranges for each class:
  • A: 2.1 ~ 9.5 tons
  • B: 9.5 ~ 42.5 tons
  • C: 42.5 ~ 190.6 tons
  • D: 190.6 ~ 854 tons
  • E: 854 ~ 3,828 tons

Science

Kerbals who fly close to an asteroid during an EVA can take a sample to earn a maximum of 70 Science from each asteroid. Asteroids may be sampled from different situations or even different biomes when the asteroid is landed on a celestial body.

Uses

  • Capturing an asteroid is a critical part of the Asteroid Redirect Mission scenario, in which an asteroid is on course to impact Kerbin and must be deflected.
  • Asteroids are also a good source of science, since each new encounter yields additional data.
  • Some contracts require you to capture a particular class of asteroid and put it in orbit around certain bodies or eject it from the solar system.
  • Once captured into a stable orbit, asteroids can be converted into space stations by attaching suitable parts to them with additional claws.
  • Asteroids can be mined for ore, which can be converted into various fuel types for ships.
  • Destroying buildings at the KSC for fun.

Gallery

Changes

1.5
  • Asteroids now sink instead of float
1.0
  • Asteroids can now be mined for Ore
  • Asteroids now also orbit near Dres
0.23.5
  • Initial release

See also

References