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Bolide Prediction
- dmcdona
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16 years 2 months ago #73486
by dmcdona
Replied by dmcdona on topic Re:Bolide Prediction
John ONeill wrote:
Err, isn't that what all asteroids are?
And perhaps you missed the salient point - this is the first "space rock" that was discovered and identified as an impactor prior to it hitting the Earth.
This is good news - it is direct evidence that we can identify impactors. In this case, yes it was small and yes, it was only identified a day before impact. Nonetheless, it shows that we have the ability and the communication channels to identify and track these things. The calculated impact location was spot on.
By the way, the MPML boards were red hot last night and the MPC were issuing updates a few times per hour - judging by other comments, this is a first at a lot of different levels.
Dave
Its just a space rock.
Err, isn't that what all asteroids are?
And perhaps you missed the salient point - this is the first "space rock" that was discovered and identified as an impactor prior to it hitting the Earth.
This is good news - it is direct evidence that we can identify impactors. In this case, yes it was small and yes, it was only identified a day before impact. Nonetheless, it shows that we have the ability and the communication channels to identify and track these things. The calculated impact location was spot on.
By the way, the MPML boards were red hot last night and the MPC were issuing updates a few times per hour - judging by other comments, this is a first at a lot of different levels.
Dave
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- dave_lillis
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16 years 2 months ago #73487
by dave_lillis
Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)
Carrying around my 20" obsession is going to kill me,
but what a way to go.
+ 12"LX200, MK67, Meade2045, 4"refractor
Replied by dave_lillis on topic Re:Bolide Prediction
Is there any videos of it entering the atmosphere. ?
Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)
Carrying around my 20" obsession is going to kill me,
but what a way to go.
+ 12"LX200, MK67, Meade2045, 4"refractor
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16 years 2 months ago #73489
by dmcdona
Replied by dmcdona on topic Re:Bolide Prediction
Dave - it was in a pretty remote location so no video of it entering the atmosphere.
There is however this image showing it entering Earth's shadow:
www.minorplanets.org/OLS/2008_TC3/
And this animation:
www.astroalert.su/files/anim2008tc3-new.gif
Also,
"Half an hour before the predicted impact of asteroid 2008 TC3, I informed an official of Air-France-KLM at Amsterdam airport about the possibility that crews of their airliners in the vicinity of impact would have a chance to see a fireball. And it was a success! I have received confirmation that a KLM airliner, roughly 750 nautical miles southwest of the predicted atmospheric impact position, has observed a short flash just before the expected impact time 0246 UTC. Because of the distance it was not a very large phenomenon, but still a confirmation that some bright meteor has been seen in the predicted direction."
Full article:
www.spaceweather.com/
There is however this image showing it entering Earth's shadow:
www.minorplanets.org/OLS/2008_TC3/
And this animation:
www.astroalert.su/files/anim2008tc3-new.gif
Also,
"Half an hour before the predicted impact of asteroid 2008 TC3, I informed an official of Air-France-KLM at Amsterdam airport about the possibility that crews of their airliners in the vicinity of impact would have a chance to see a fireball. And it was a success! I have received confirmation that a KLM airliner, roughly 750 nautical miles southwest of the predicted atmospheric impact position, has observed a short flash just before the expected impact time 0246 UTC. Because of the distance it was not a very large phenomenon, but still a confirmation that some bright meteor has been seen in the predicted direction."
Full article:
www.spaceweather.com/
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16 years 2 months ago #73492
by dmcdona
Replied by dmcdona on topic Re:Bolide Prediction
neo.jpl.nasa.gov/news/news160.html
Impact of Asteroid 2008 TC3 Confirmed
Don Yeomans
NASA/JPL Near-Earth Object Program Office October 7, 2008
Confirmation has been received that the asteroid impact fireball occurred at the predicted time and place. The energy recorded was estimated to be 0.9 to 1.0 kT of TNT and the time of detection was
02:45:45 on October 7 (Greenwich Standard Time). More details on this detection will be forthcoming. An addition confirmation was apparently reported by a KLM airliner (see: www.spaceweather.com/ ). As reported by Peter Brown (University of Western Ontario, Canada), a preliminary examination of infrasound stations nearest to the predicted impact point shows that at least one station recorded the event. These measurements are consistent with the predicted time and place of the atmospheric impact and indicate an estimated energy of 1.1 - 2.1 kT of TNT.
Impact of Asteroid 2008 TC3 Confirmed
Don Yeomans
NASA/JPL Near-Earth Object Program Office October 7, 2008
Confirmation has been received that the asteroid impact fireball occurred at the predicted time and place. The energy recorded was estimated to be 0.9 to 1.0 kT of TNT and the time of detection was
02:45:45 on October 7 (Greenwich Standard Time). More details on this detection will be forthcoming. An addition confirmation was apparently reported by a KLM airliner (see: www.spaceweather.com/ ). As reported by Peter Brown (University of Western Ontario, Canada), a preliminary examination of infrasound stations nearest to the predicted impact point shows that at least one station recorded the event. These measurements are consistent with the predicted time and place of the atmospheric impact and indicate an estimated energy of 1.1 - 2.1 kT of TNT.
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- JohnONeill
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16 years 2 months ago #73503
by JohnONeill
Replied by JohnONeill on topic Re:Bolide Prediction
Dave,
Err, no.
Just wait until Dawn gets to Ceres and Vesta and you will see real asteroids (i.e. minor planets), not just rocks! The asteroids viewed close up until now are really just large rocks (maybe at least some are better described as rubble piles).
Before that Rosetta will see Lutetia.
John
Err, no.
Just wait until Dawn gets to Ceres and Vesta and you will see real asteroids (i.e. minor planets), not just rocks! The asteroids viewed close up until now are really just large rocks (maybe at least some are better described as rubble piles).
Before that Rosetta will see Lutetia.
John
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16 years 2 months ago #73506
by dmcdona
Replied by dmcdona on topic Re:Bolide Prediction
Indeed - really looking forward to the Dawn mission (which I'm helping support with astrometry to the JPL).
When's Rosetta due to get an image - any ideas?
Also, I was interested in your post yesterday on CI Cygni. I'll respond there.
DAve
When's Rosetta due to get an image - any ideas?
Also, I was interested in your post yesterday on CI Cygni. I'll respond there.
DAve
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