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Disasteroid (v0.16)

maltesh
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maltesh

maltesh

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This is the Disasteroid.

5VMXvl.png

At T+24 hours, it will hit Kerbin.

WCDTll.png

You have until then to stop it. Failure will mean ... the obliteration of the asteroid as it splashes down hard into Kerbin in twenty-four hours because the game doesn't really model that sort of thing. But that's beside the point.

Setup: Obtain JellyCubes' 500m asteroid part and install it in your /parts directory.

Download this persistence.sfs file. BACK UP your own /saves/default/persistence.sfs file, and put this one in its place.

The file is set to UT=0, and contains the Disasteroid, and a single Mk. 1 Pod on the launchpad. As set up, the Disasteroid\'s orbit is equatorial and hyperbolic, and will miss the Mun's sphere of influence.

It is possible to merge the Disasteroid's Vessel Data into an existing persistent.sfs Anyone wishing to do so should make sure to alter its EPH= value to match the UT= value at the beginning of the file. As before, if you're going to do this, BACK UP the file before you do so. Depending on the position of the Mun in your existing file, this may make things a lot easier, or a lot harder.

Rules: Make it as easy or as hard as you want it to be; it's up to you. If you consider a part or tool too cheaty, don't use it.

Criteria for Success: Rendezvous with the asteroid, and do something that will prevent it from impacting Kerbin.

You may pretend that a ragtag team of Texak Oilkerbs attempt a harrowing EVA to plant nuclear devices on imaginary fault lines, and then delete it from the map screen.

Pehaps as a last-ditch attempt to prevent oceans from rising and cities from falling, and allowing hope to survive, your brave Kerbalnauts will crash their spacecraft into the asteroid and destroy it.

Or you could throw something at it.

The 500m Asteroid part has an Impact Tolerance of 20; Impacting it solidly with anything will destroy it. Game physics means that the consequences for the impacting object will likely be severe and unpredictable. Attempting to push it out of the way will probably fail catastrophically.

Post some images of your attempts. Why not? Tell us what happened, and give us your altitude and MET when the Disasteroid is dealt with.

Things that might be useful:

This Google Docs Disasteroid Intercept Spreadsheet

r4m0n's MechJeb part and plugin.

The clock is ticking. Good luck.

Leaderboard, ranked by Disasteroid Altitude at destruction in descending order:

[TABLE=width: 500]

<tbody>[TR]

[TD]Rank[/TD]

[TD]Name[/TD]

[TD]Notes[/TD]

[TD=align: center]MET at Destruction[/TD]

[TD=align: center]Disasteroid Altitude[/TD]

[/TR]

[TR]

[TD]1[/TD]

[TD]bsalis [/TD]

[TD]SSTO Aerospace, Successful return[/TD]

[TD=align: right]19:06[/TD]

[TD=align: right]19,693 km[/TD]

[/TR]

[TR]

[TD]2[/TD]

[TD]YURI KAGARIN [/TD]

[TD]Aerospace[/TD]

[TD=align: right]19:34[/TD]

[TD=align: right]18,125 km[/TD]

[/TR]

[TR]

[TD]3[/TD]

[TD]Bluejayek [/TD]

[TD]All stock, kamikaze[/TD]

[TD=align: right]about 23:08[/TD]

[TD=align: right]about 4,855 km[/TD]

[/TR]

[TR]

[TD]4[/TD]

[TD][/TD]

[TD][/TD]

[TD][/TD]

[TD][/TD]

[/TR]

[TR]

[TD]5[/TD]

[TD][/TD]

[TD][/TD]

[TD][/TD]

[TD][/TD]

[/TR]

</tbody>[/TABLE]

Edited by maltesh
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Romfarer

Romfarer

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In a couple months when i have finished my Kerbal Interplanetary Defense System (oh dear acronym) i will send it back in time...wait, make that a couple more months. ??? THEEEEN i will send it back in time to this point and blow that thing out of the sky!!!

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lars

lars

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YES YES YES YES YES.

This is something I have been dreaming of, but did not have the knowledge to pull off.

Do you think you could make another scenario where it will impact in T+ 1 year?

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maltesh

maltesh

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YES YES YES YES YES.

This is something I have been dreaming of, but did not have the knowledge to pull off.

Thanks.

Do you think you could make another scenario where it will impact in T+ 1 year?

That would be really difficult to pull off. An object at rest relative to Kerbin at 84,000 km (just inside the limit of the Sphere Of Influence) takes a little under 5 1/3 days to fall to Kerbin\'s atmosphere. Without knowing the exact specifics of the SOIs, and the orbit of Kerbin, I can\'t think of an easy way to set things up so that the object will impact in one year, and even knowing those specifics, it would still be pretty daunting.

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maltesh

maltesh

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*smacks forehead* Yeah, that would probably work. I\'d still really need to know the specifics of Kerbin\'s orbit, but it would be possible to set something in a circular Kerbin orbit slightly higher or lower, and far enough back or forward that it takes, say, 360 days to catch up with the SOI. As long as it entered with a relative velocity of less than about 25 m/s, it would hit Kerbin.

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Sean Mirrsen

Sean Mirrsen

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Wouldn\'t it be more fun to have the asteroid on a Sun orbit exactly matching the Kerbin orbit, going in reverse? Gives you half a year preparation time, perfect impact accuracy and ludicrous interception speed. Like, some eighteen kilometers a second ludicrous.

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maltesh

maltesh

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In both of the times I\'ve pulled off the rendezvous so far, I\'ve orbited to the far side of the planet, eyeballed the proper burning point, and tried to set up an orbit where I hit apoapsis just as the asteroid came charging past. In both cases, I missed initially, wound up burning hard to swing around behind the asteroid, then burning again to kill forward motion, burning again to catch up with it, followed by burning again to slow down and fine-tuning with RCS.

I suspect that the actual intercept is easier than with a low-altitude orbital intercept over Kerbin; For most of the time before impact, the Disasteroid is moving in nearly a straight line. I don\'t think any of my flights to intercepting objects in circular orbits have gone anywhere near that quickly once I got close.

I\'m going to shoot it with a rocket full of Kerbals.

PS: I thought the 500m asteroid had collision problems and was basically impossible to touch?

When I\'ve been practicing orbital rendezvouses, I\'d been using it as a target. If you touch its collision box with pretty much anything (and the collision box isn\'t the same as its shape, apparently), the simulation freaks out. Generally, what happened was that pieces of my spacecraft were torn off and flung away at high velocities, and most of the time, the asteroid disappeared.

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Maikie_G

Maikie_G

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Wouldn\'t it be more fun to have the asteroid on a Sun orbit exactly matching the Kerbin orbit, going in reverse? Gives you half a year preparation time, perfect impact accuracy and ludicrous interception speed. Like, some eighteen kilometers a second ludicrous.

Gives you half a year to put up a ludicrous debris field. Or you could just put up one satelite exactly matching Kerbin\'s orbit...

would shooting the asteroid with one of JellyCube\'s railguns carry enough force to destroy it?

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maltesh

maltesh

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nuclear crap in aasteriods, crashing shuttle in the asteriod, armageddon reference?

The line about planting nuclear devices was indeed an Armageddon reference. Crashing the spacecraft into the asteroid was a Deep Impact reference; that movie\'s tagline was 'Oceans will rise, Cities will fall, Hope Survives.'

Admittedly, Deep Impact was about trying to stop a comet, not an asteroid.

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marko dash

marko dash

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does this asteroid have it\'s own gravity and SoI? with some of C7\'s high powered retro RCS units you could softland nose down (might need some inverted landing legs) and use your engines to alter it\'s orbit.

bonus points if you can get it into a safe stable orbit? :)

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maltesh

maltesh

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It has neither SOI nor gravity. It is merely a Part of Ridiculous Size.

DHaHQl.jpg

It also only masses 20,000 (tons?) which is ridiculously low, but the collision issues will likely make any direct contact violent and unpredictable.

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Caesar15

Caesar15

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The line about planting nuclear devices was indeed an Armageddon reference. Crashing the spacecraft into the asteroid was a Deep Impact reference; that movie\'s tagline was 'Oceans will rise, Cities will fall, Hope Survives.'

Admittedly, Deep Impact was about trying to stop a comet, not an asteroid.

Didnt they fly the ship in the middle of the asteroid in Armageddon though?

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RedDwarfIV

RedDwarfIV

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Didnt they fly the ship in the middle of the asteroid in Armageddon though?

It wasn\'t a ship, it was two shuttles.

And it has been pointed out that putting a nuclear warhead at 800 feet down into an asteroid the size of Texas is like putting the phosphorus head of a match into the outer skin of a football [soccer ball to Americans] and then lighting it. You are not going to blow up the football.

Also,

internet-memes-americans1.png

(Realised this was the wrong thread for that, but I\'ll leave it anyway.)

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