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Old 10-05-2009
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LCROSS Viewer's Guide



Early Friday morning (4:30 am PDT, 8:30 Eastern), NASA's Lunar CRater Observation and Sensing Satellite (LCROSS) spacecraft, and the Lunar Reconnaissance Orbiter's (LRO) Centaur upper stage will collide with the Cabeus crater near the Lunar South Pole.

Quote:
On final approach, the Shepherding Spacecraft (LCROSS) and Centaur will separate and the Centaur upper stage will act as a heavy impactor to create a debris plume that will rise above the lunar surface. Following four minutes after impact of the Centaur upper stage, the Shepherding Spacecraft will fly through this debris plume, collecting and relaying data back to Earth before impacting the lunar surface and creating a second debris plume. NASA expects the impact velocity will be over 9,000 km/h (5,600 mph). The Centaur impact will excavate greater than 350 tonnes of lunar material and create a crater 20 m (66 feet) in diameter to a depth of 4 m (13 feet). The Shepherding Spacecraft impact will excavate an estimated 150 tonnes and with a crater 14 m (46 feet) in diameter to a depth of 2 m (6 feet).

It is hoped that spectral analysis of the resulting impact plume will help to confirm preliminary findings by the Clementine and Lunar Prospector missions which hinted that there may be water ice in the permanently shadowed regions. LCROSS will fly through the debris plume and will then crash itself into a different part of the crater approximately four minutes after the Centaur impact.
Coverage begins 7:15 AM eastern on NASA TV, with the Centaur impact at 8:30 EST. Anyone with a telescope 10" and larger west of the Mississippi should still have enough darkness to see it.

Retaliatory strikes are expected shortly thereafter.
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Old 10-09-2009
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Re: LCROSS Viewer's Guide

Well, the pyrotechnics leave something to be desired.

A Splashdown?
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Old 10-09-2009
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Re: LCROSS Viewer's Guide

I woke up a bit earlier than normal to watch this, then managed to fall back asleep on the couch before the impact. Just watched it on Youtube, though and it doesn't look like I really missed much. Now I eagerly await photographs of the plume from amateur astronomers...
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Old 10-09-2009
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Re: LCROSS Viewer's Guide

Quote:
Originally Posted by Speakeasy View Post
I woke up a bit earlier than normal to watch this, then managed to fall back asleep on the couch before the impact. Just watched it on Youtube, though and it doesn't look like I really missed much. Now I eagerly await photographs of the plume from amateur astronomers...
Damm, I missed it too.
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Old 10-09-2009
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Re: LCROSS Viewer's Guide

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Originally Posted by JoMe View Post
Damm, I missed it too.
YouTube - Nasa LCROSS Moon Iimpact

Now you can experience the edge of your seat excitement.
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Old 10-09-2009
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Re: LCROSS Viewer's Guide

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Originally Posted by Speakeasy View Post
YouTube - Nasa LCROSS Moon Iimpact

Now you can experience the edge of your seat excitement.
I loved the part at the end where the people are clapping in the background.

"YAAAAAY! We successfully crashed!"
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Old 10-09-2009
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Re: LCROSS Viewer's Guide

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Originally Posted by Steve View Post
I loved the part at the end where the people are clapping in the background.

"YAAAAAY! We successfully crashed!"
It's always funny watching (or hearing) the folks at NASA practically bust a nut over these things. Of course, it makes more sense when you realize they've put years of hard work into it, but still. I remember watching their reaction to the Shoemaker-Levy impact and thinking all of NASA was on the verge of breaking out in a mass orgy.
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