(meteorobs) New possible parent comet

[Roberto G.]

From: "Denis Denissenko" <denis at hea.iki.rssi.ru>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: Tuesday, September 07, 2004 9:05 PM
Subject: Re: (meteorobs) New possible parent comet


> 
> Hello all!
> 
> tom6740 wrote:
> 
> > Interesting news! Thanks to Mikhail's work, and could you tell me
> > when will the Earth pass the "point"?
> 
> I also noticed the interesting orbit of this comet yesterday and played 
> around with it a little.  It turns out the comet is late by 38 days.  
> That means, if it has passed the perihelion on July 22nd instead of 
> August 30th, then we would have had a close approach to 0.026 a.u. on 
> July 30th-31st.
> 
> Indeed, P/2004 R1 (McNaught) is currently listed among Potencially 
> Hazardous Comets at http://neo.jpl.nasa.gov/cgi-bin/neo_elem?type=NEC at 
> rank 6 if you sort 'em by MOID (min. orbit intersection distance).  But 
> still it's MOID is 3 times larger than that of 55P/Tempel-Tuttle and 30 
> times as compared to  109P/Swift-Tuttle.  Another point which makes 
> meteor activity from this comet very unlikely is intrinsic faintness of 
> 2004 R1.  If I'm correct, its current brightness suggests an absolute 
> magnitude of only 18.5.  This means there's a very little material left 
> of this comet after its 1990 approach to Jupiter.
> 
> It will be interesting, however, if other - probably larger - remnants 
> of the original body will be found.
> 
> Best regards,
> 
> Denis in Moscow
> 
> P.S. Can somebody calculate the coordinates of possible radiant related 
> to this comet and velocity of meteors?

I think that perharps in the time of 2-3 orbits the debris torus shall 
be enlarged for to have meteors on the Earth.
Roberto Gorelli