REPORT ABUSIVE REPLY
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Message Subject
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Asteroid 2012 DA14
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Poster Handle
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Dr. Astro |
Post Content
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It was discovered at the start of 2012 and is set to travel between the Earth and our geostationary communication satellites on 15 February 2013. At a distance of just 22,500km this will be the closest asteroid ‘fly by’ in recorded history.
Quoting: StormeyGoddess Except its' closest approach is actually on the 16th. On the 15th, it is .0034 AU, or 316,000 miles. It will be about .0003 AU or 27,000 miles from Earth on the 16th. That doesn't seem close enough to hit, but why are they lying about the day? [ link to ssd.jpl.nasa.gov] Quoting: Meggarea Does no one read the disclaimer on that stupid java applet? "Theapplet wasimplemented using 2-bodymethods, and henceshould not be used for determining accurate long-term trajectories(over several yearsor decades) or planetary encounter circumstances." And even that aside, I'm guessing you only looked at the distance at midnight on each day. They didn't lie, close approach is at 19:25 UT on the 15th, thus when you look at the distance at midnight on the 16th it's closer than it is at midnight on the 15th. And please don't use the java applet for planetary encounters like this, it's just a two-body quick browse tool. They have a very accurate table of the close approach times and distances right below, which shows it on Feb 15, 2013 at 19:25.
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