[FPSPACE] Griiffin's Giant...Chinese may befirsttoputtaikonauts on Mo....

[Jens Kieffer-Olsen]

 Ed,

 They are all coming in due time, but fortunately most of
 them take megayears. And some are politely expelled from
 the solar system, why others are destined to become snacks
 and absorbed by the Sun and Jupiter etc. It's not Earth the
 planet that is any danger, it's only its biosphere - us.

 A few years back I calculated that based on the number of
 >1km NEA's identified and the ratio of PHA's of Aten type,
 there would be about three of those left to spot. So, when
 discussing whether to send a spacecraft to Venus to map the
 orbits of Atens, the issue is not just to identify small
 NEA's in the range from 140m to 900m. There is likely to
 be at least one continent killer lurking unseen in the
 glare of the Sun, even after the US has achieved the goal
 of 90% detection.  

 Atens have shorter orbital times, so if you compare each
 asteroid revolution around the Sun to a punter pulling
 the handle of a jackpot machine, they are a damned lot
 faster than the average Joe Sixpack, whose pulls take
 longer due to his regular visits to the Mars bar to fetch
 beer, and whose chance of producing a jackpot is therefore
 more elusive.

--
Jens Kieffer-Olsen
Slagelse, Denmark

> -----Original Message-----
> From: E.P. Grondine [mailto:epgrondine at hotmail.com] 
> Sent: Sunday, March 18, 2007 5:01 AM
> 
> Hi Jens -
> 
> My guess is that the fragments of Comet Schwassmann Wachmsnn 
> 3 are the nearer threat (2022), rather than Apophis.  We
> appear to have been hit by two of them iat Rio Curaca (1930)
> and Rupunini (1936). I wouoln't bet on 
> these fragments turning to dust, as some hope.
> 
> regards,
> E.P. Grondine
> Man and Impact in the Americas
> 
> >From: "Jens Kieffer-Olsen" <dstdba at post4.tele.dk>
> >Reply-To: dstdba at post4.tele.dk
> >To: <fpspace at friends-partners.org>
> >Subject: Re: [FPSPACE] Griiffin's Giant...Chinese may be 
> >firsttoputtaikonauts on Mo....
> >Date: Sat, 17 Mar 2007 21:00:02 +0100
> >
> >
> >  -----Original Message-----
> >  From: DSFPortree at aol.com [mailto:DSFPortree at aol.com]
> >  Sent: Saturday, March 17, 2007 1:25 AM
> >
> > > Closer to home, what if we showed the world that we
> > > could detect all incoming dangerous asteroids and deflect
> > > them?
> >
> >  Presumably everyone on Fpspace understands this is
> >  the right thing to do. And that doing so it is the very
> >  justification for spending trillions of dollars, roubles,
> >  euros, and ..eh.. renmins on space exploration.
> >
> >  In ordet to communicate this understanding to the public,
> >  however - in fierce competition with the give-those-
> >  trillions-to-us-that-we-may-prevent-Global-Warming-
> >  from-coming-to-get-you quacks - you, sadly, seem to need
> >  a lost city with lots of actual victims.
> >
> >  Let's the hope the close passage of Apophis in 2029 will
> >  alert the world population to the need for all asteroids
> >  larger than 75m with orbits inside that of Jupiter to be
> >  catalogued. Even if their number is close to one trillion!
> >
> >  Remember that human settlements on Mars will be much closer
> >  to the asteroid belt than cities on Earth are.
> >
> >--
> >Jens Kieffer-Olsen
> >Slagelse, Denmark
> >
> >_______________________________________________
> >FPSPACE mailing list
> >FPSPACE at friends-partners.org
> >http://www.friends-partners.org/mailman/listinfo/fpspace
> 
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