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Old 12-November-2007, 09:21 AM
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Talking Killer asteroid alert was just science fantasy

From the Metro online

Quote:
Space experts were poised to warn us that a deadly giant asteroid was about to threaten Earth.

In scenes eerily reminiscent of Hollywood blockbuster Armageddon, it was feared the cosmic rock would come within a whisker of terra firma. Even astronomer Sir Patrick Moore sought to calm nerves with a 'don't panic' message.

But US scientists were left redfaced when their gloomy predictions were scotched.

A sharp-eyed Russian tracked the trajectory of the 'asteroid'... and discovered it was a comet-chasing European space probe, named Rosetta.

I bet someone is feeling pretty silly right now

I wonder if someone will get the order of the boot over this
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Old 13-November-2007, 12:41 AM
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Now they know how I felt when I triped just after the starting line in a televised Track Meet, skinned my knee and arms, and got all dirty. (I still beat five runners, though)
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Old 13-November-2007, 08:20 AM
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And here I thought it was just a mistake.

Dave Mitsky
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Old 13-November-2007, 04:05 PM
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Quote:
Originally Posted by KaiYeves View Post
Now they know how I felt when I triped just after the starting line in a televised Track Meet, skinned my knee and arms, and got all dirty. (I still beat five runners, though)
Watch out for that tripe, it's slippery.
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Old 14-November-2007, 01:25 AM
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Quote:
Watch out for that tripe, it's slippery.
There was nothing wrong with the course, there were just so many runners that I tripped on somebody's foot.
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Old 14-November-2007, 01:33 AM
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Quote:
Originally Posted by KaiYeves View Post
There was nothing wrong with the course, there were just so many runners that I tripped on somebody's foot.
Just responding to this.
Quote:
when I triped
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"The Mayan symbol for "book" looks a lot like a triple hamburger, but I've never seen them claiming it as proof the Mayans had Big Macs." - KaiYeves
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Old 14-November-2007, 01:49 AM
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Quote:
Originally Posted by Sticks View Post
Previously reported in topics:
Non-NEO Alert!
Extremely close flyby by asteroid 2007 VN84 on November 13

Quote:
Originally Posted by Sticks View Post
I bet someone is feeling pretty silly right now

I wonder if someone will get the order of the boot over this
Not really, because 1) It builds support for the idea that there is a need for a database of artificial objects astronomers can check a discovered object against, and 2) It still demonstrates the remarkable skills our guardians have to be able to spot and give warning of such a tiny object of insignificant threat.
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Old 14-November-2007, 09:48 AM
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People seem to think there is something faintly amusing about an observed NEO turning out to be a spacecraft. I'd be more concerned if it were not detected, and see no reason to separate the classes of objects with such rigour.
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Old 14-November-2007, 12:22 PM
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So what do they mean by

Quote:
the designation "2007 VN84" will be retired.
???
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Old 14-November-2007, 01:34 PM
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They would hardly reuse the designation.

I would imagine that, in time, as the number of artificial objects in solar orbit increases, then there would be a common database, with a naming convention that embraces comets, asteroids, probes, even manned craft, and anything undetermined - and also allows for a change of object class.
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Old 14-November-2007, 10:44 PM
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Sounds like the NEO-watchers could use some more advanced equipment than they currently have - stuff that could somehow discern between space probes and asteroids. Higher-resolution cameras/telescopes should do the trick.

- Maha "pain in the asteroid" Vailo
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Old 15-November-2007, 08:23 AM
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Certainly it would be good to be able to discern the class of a NEO, but some of the rocks are around the same size as probes.

Probes (active or defunct, and there might eventually be quite a few) in potential collision orbits should surely be identified by the same process as natural NEOs.
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Old 15-November-2007, 08:46 AM
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From the MPC

Quote:
This incident, along with previous NEOCP postings of the WMAP spacecraft,
highlights the deplorable state of availability of positional information on
distant artificial objects (whether in earth orbit or in solar orbit).
For some reason this did seem to come across as someone with egg on their face trying to off load the blame.

Will this mean that in the future there will be less chance of a miss-identification?
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Old 15-November-2007, 09:23 AM
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Quote:
Originally Posted by Sticks View Post
For some reason this did seem to come across as someone with egg on their face trying to off load the blame.
But why should it?
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Old 15-November-2007, 05:09 PM
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Quote:
Originally Posted by Sticks View Post
Will this mean that in the future there will be less chance of a miss-identification?
If they get some cash so that they can afford updated equipment.
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Old 15-November-2007, 10:02 PM
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Quote:
Originally Posted by Maha Vailo View Post
Sounds like the NEO-watchers could use some more advanced equipment than they currently have - stuff that could somehow discern between space probes and asteroids. Higher-resolution cameras/telescopes should do the trick.

- Maha "pain in the asteroid" Vailo
Some of the best NEO watching telescopes don't need high angular resolution as much as they need huge fields of view. The bigger the FOV, and the more light gathering, the better odds of spotting something. Resolving more than a point of light for any given rock would require a much longer focal length than what you really want in a NEO watcher, and a much bigger apperture than you really need for the job. The key to success in catching these things is not to have one gigantic super expensive scope, it's to have a whole army of smaller automated scopes watching as much of the sky every night as possible. That's why even well-equipped amateurs can make contributions.
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Old 10-October-2008, 05:52 AM
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So did anyone get any cool pictures of Rosetta as it flew by?

Well others are resurecting one year old threads
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Old 10-October-2008, 07:24 PM
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Quote:
Originally Posted by NGCHunter View Post
Some of the best NEO watching telescopes don't need high angular resolution as much as they need huge fields of view. The bigger the FOV, and the more light gathering, the better odds of spotting something. Resolving more than a point of light for any given rock would require a much longer focal length than what you really want in a NEO watcher, and a much bigger apperture than you really need for the job. The key to success in catching these things is not to have one gigantic super expensive scope, it's to have a whole army of smaller automated scopes watching as much of the sky every night as possible. That's why even well-equipped amateurs can make contributions.
I can see potential for space-based systems in this. Orbiting wide-field telescopes combined with telescopes of longer length. Locate something on the wide field and examine it more closely with the longer optic. Expensive to maintain, but it's an interesting possibility.
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