APOD: A Wheel on Mars (2012 Aug 07)

Comments and questions about the APOD on the main view screen.
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DavidLeodis
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by DavidLeodis » Wed Aug 08, 2012 8:04 pm

I have a question about the time of landing on Mars. In the explanation it states "August 5, 2012 at 10:32pm (PDT)". I have however seen the landing time given as about 10:15 pm under Pacific Daylight Time (PDT). As the time lag between the landing and when that information was received was around 15 minutes I wonder if the 10:32pm PDT landing time is correct or if that was when the news was received. Thanks for an answer to this.

ta152h0
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by ta152h0 » Wed Aug 08, 2012 8:23 pm

for historical records, I remember, on the tv machine, seeing the team at JPL erupting in cheers and hugs right about 10.31 PM at Grand Coulee , Washington state.
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Chris Peterson
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by Chris Peterson » Wed Aug 08, 2012 8:26 pm

DavidLeodis wrote:I have a question about the time of landing on Mars. In the explanation it states "August 5, 2012 at 10:32pm (PDT)". I have however seen the landing time given as about 10:15 pm under Pacific Daylight Time (PDT). As the time lag between the landing and when that information was received was around 15 minutes I wonder if the 10:32pm PDT landing time is correct or if that was when the news was received. Thanks for an answer to this.
The landing was certainly observed at around 10:30 pm PDT, so the suggestion that the earlier time represents when it "really" happened is reasonable.
Chris

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BMAONE23
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by BMAONE23 » Wed Aug 08, 2012 9:15 pm

DavidLeodis wrote:I have a question about the time of landing on Mars. In the explanation it states "August 5, 2012 at 10:32pm (PDT)". I have however seen the landing time given as about 10:15 pm under Pacific Daylight Time (PDT). As the time lag between the landing and when that information was received was around 15 minutes I wonder if the 10:32pm PDT landing time is correct or if that was when the news was received. Thanks for an answer to this.
Currently the "Light Distance" to Mars is 13.9 minutes and steadily though slowly growing. So while the information about the event reached us at 10:31pm Pacific Time, it actually happened at 10:17pm Pacific Time and the signal took 13.9 minutes to reach us. So while the event happened at 10:17, we didn't know and couldn't celebrate the fact until the signal reached us
http://www.physics.emory.edu/astronomy/ ... /calc.html Here is a real time distance clock to Mars

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DavidLeodis
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by DavidLeodis » Wed Aug 08, 2012 9:32 pm

Thanks all for your responses, which are appreciated. :)

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neufer
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by neufer » Wed Aug 08, 2012 9:41 pm

Art Neuendorffer

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neufer
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by neufer » Thu Aug 09, 2012 3:58 am

Click to play embedded YouTube video.
Chris Peterson wrote:
ta152h0 wrote:
I thought the descent camera was mounted on the skycrane. Anyone know yet where the beast crashed ?
The descent camera is on Curiosity. All the bits
and pieces have been imaged on the surface:

http://asterisk.apod.com/viewtopic.php? ... 22#p181122
Art Neuendorffer

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neufer
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by neufer » Thu Aug 09, 2012 9:06 pm

Psnarf wrote:
Lessee, shoot a 4-ton 9-ft high x 14-ft diameter over 350 million miles, then drop a one-ton semi-autonomous nuclear-powered ATV on target in working condition 13.8 light-minutes away?
  • No problem.
  • No problems that have as yet been acknowledged :arrow:
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BMAONE23
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by BMAONE23 » Thu Aug 09, 2012 9:22 pm

Hopefully it gets rolling soon

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neufer
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Re: APOD: A Wheel on Mars (2012 Aug 07)

Post by neufer » Wed Aug 15, 2012 8:32 pm

Click to play embedded YouTube video.
Art Neuendorffer