[meteorite-list] Rosetta gravity assist flyby

From: Sterling K. Webb <sterling_k_webb_at_meteoritecentral.com>
Date: Fri, 9 Nov 2007 15:21:05 -0600
Message-ID: <0c7e01c82316$70bdf8d0$c944e146_at_ATARIENGINE>

Hi,

    There's something re-assuring about the notion
that we could detect a "potential impactor," even
if we didn't immediately recognize that it's one of
ours!



Sterling K. Webb
-------------------------------------------------------------
----- Original Message -----
From: <lebofsky at lpl.arizona.edu>
To: "mexicodoug" <mexicodoug at aol.com>
Cc: <meteorite-list at meteoritecentral.com>
Sent: Friday, November 09, 2007 12:49 PM
Subject: Re: [meteorite-list] Rosetta gravity assist flyby


The first announcment was a real one. I do not think that it was at first
realized that it was Rosetta!

I hope there will be more info in the next few days.

Larry

On Fri, November 9, 2007 11:35 am, mexicodoug wrote:
> Someone has a sense of humour, especially the flying couch comment !
>
>
> So, will closest approach be 20:57, 21:04, 21:13 UT, or undetermined, and
> who will get the view? I think Rosetta won't be rising until 21:15
> where I'm at in southern North America, and at close approach will be
> moving at around 3 degrees (6 full moons) per minute. That is a little
> challenging.....especially if the spacecraft is not oriented to reflect
> much back.
>
> Thanks kindly,
> Doug
>
>
>
> ----- Original Message -----
> From: "Spaceguard" <mail at spaceguarduk.com>
> To: <lebofsky at lpl.arizona.edu>
> Cc: "Meteorite Mailing List" <meteorite-list at meteoritecentral.com>; "Ron
> Baalke" <baalke at zagami.jpl.nasa.gov>
> Sent: Friday, November 09, 2007 11:35 AM
> Subject: Re: [meteorite-list] Did a Collision Cause
> Comet17P/Holmes'MysteriousOutburst?
>
>
>
>> Yep. It's the Rosetta spacecraft making its planned gravity assist
>> fly-by of the Earth.
>>
>> Jay Tate
>> The Spaceguard Centre
>>
>>
>> ----- Original Message -----
>> From: <lebofsky at lpl.arizona.edu>
>> To: <lebofsky at lpl.arizona.edu>
>> Cc: "Meteorite Mailing List" <meteorite-list at meteoritecentral.com>; "Ron
>> Baalke" <baalke at zagami.jpl.nasa.gov>
>> Sent: Friday, November 09, 2007 5:24 PM
>> Subject: Re: [meteorite-list] Did a Collision Cause Comet
>> 17P/Holmes'MysteriousOutburst?
>>
>>
>>
>>> Hi List:
>>>
>>>
>>> I am trying this again since my previouys forward did not appear to
>>> go through.
>>>
>>> On November 13, this newly-discovered asteroid (only about 20 meters
>>> diameter) will pass within 2 Earth radii of the CENTER of the Earth
>>> (that
>>> is close). It will be 9th magnitude (about 50-100 times too faint to
>>> see with the naked eye), but show be observable with a small telescope
>>> (if it
>>> is night where you are when it comes by and you know were to look).
>>>
>>> Go to the cfa.harvard site for coordiantes, etc. I can interpret
>>> columns if you are interested.
>>>
>>> I am sure there will be more about this in the coming days.
>>>
>>>
>>> LArry
>>>
>>>
>>> Begin forwarded message:
>>>
>>>
>>>> From: Alan W Harris <awharris at spacescience.org>
>>>> Date: November 8, 2007 5:15:19 PM MST
>>>> To: "Peter Birtwhistle" <peter at birtwhi.demon.co.uk>
>>>> Cc: mpml at yahoogroups.com
>>>> Subject: Re: {MPML} 2007 VN84 incoming
>>>>
>>>>
>>>> 2007 VN84 is significant in that it not only comes closer, it is
>>>> much bigger, around 20 m in diameter, compared to 2004 FU162 only
>>>> about 1/3 that
>>>> size. Based on our recent population estimates, we expect an object
>>>> the size of 2004 FU162 to pass within a couple Earth radii about
>>>> once a year, and to actually impact (actually, blow up in the upper
>>>> atmosphere) about once in five years, so the only thing unusual about
>>>> 2004 FU162 is
>>>> that we saw it as it passed by. 2007 VN84, on the other hand, is so
>>>> large that we expect omething that big to come as close as 2 radii
>>>> only about once in 20 years, so it is a remarkable event in itself,
>>>> in addition to the fact that it was discovered and can be watched
>>>> flying by. Congratulations to Richard
>>>> Kowalski and the Catalina Sky Survey.
>>>>
>>>>
>>>> Cheers,
>>>>
>>>>
>>>> Alan
>>>>
>>>>
>>>> P.S. I second his request and interest for a lightcurve, but it
>>>> will be a real challeng on account of its rate of motion. Plenty
>>>> bright enough, but really truckin'.
>>>>
>>>> At 03:57 PM 11/8/2007, Peter Birtwhistle wrote:
>>>>
>>>>> Take a look at MPEC 2007-V69 just announced...
>>>>>
>>>>>
>>>>> http://www.cfa.harvard.edu/mpec/K07/K07V69.html
>>>>>
>>>>>
>>>>> "The minimum distance from the geocenter is 0.000081 AU (1.89
>>>>> Earth
>>>>> radii) on Nov 13.844 UT"
>>>>>
>>>>> just beating the previous record close approach of 2004 FU162,
>>>>> but this time we have 5 days lead time.
>>>>>
>>>>> Peter
>>>>>
>>>
>>>>
>>>> *******************************************************************
>>>> Alan W. Harris
>>>> Senior Research Scientist
>>>> Space Science Institute
>>>> 4603 Orange Knoll Ave. Phone: 818-790-8291
>>>> La Canada, CA 91011-3364 email: awharris at SpaceScience.org
>>>> *******************************************************************
>>>>
>>>>
>>>>
>>>> __._,_.___
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>>>>
>>>> Posts to this list or information found within may be freely used,
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>>>> as the source of the information.
>>>
>>>
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>>
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Received on Fri 09 Nov 2007 04:21:05 PM PST