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Re: (meteorobs) re C/2001 A2 "debris"...
To see the 3D orbit, you can go
http://neo.jpl.nasadot gov/cgi-bin/db?200317
It really seems that this comet will take us a possible new shower on July
13-14 in the Southern Sky.
BTW, I can't understand all the data you gave, and what does the word "prog"
mean, or what is it short for? I cannot find it in any dictionary.
OK, I won't ask you how it worked. But could you please put the signs such
as "-Q", "-B", "Q+"...into the words I'm able to understand, too?
All best wishes and Clear skies!
Huan Meng meteorobs@263dot net
----- Original Message -----
From: <crawl@zoom.codot uk>
To: <meteorobs@jovian.com>
Sent: Sunday, April 01, 2001 8:16 AM
Subject: (meteorobs) re C/2001 A2 "debris"...
>
> Mike Linnolt asked about possibility of debris from C/2001 A2 LINEAR given
> some sort of meteor shower or such.
>
> I've put the numbers [comet's orbital elements] into a little prog that I
> managed to get hold of once [written by a Slovak professional astronomer,
> so don't ask me how it works!], and this is what it coughed out::-
>
> > EQUINOX: 2000.0; DATA FOR YEAR: 2001
> >--------------------------------------------------------------------
> >METH. ALPHA DELTA VG VH L DATE-MAX. D-DISC.
> > -Q 142.8 35.4 40.25 42.45 295.1 JAN. 15.2 .497
> > -B 148.8 40.3 32.98 36.67 295.1 JAN. 15.2 .464
> > -W 138.3 68.4 29.73 42.46 295.1 JAN. 15.2 1.015
> > -A 213.9 40.7 31.57 42.15 7.3 MAR. 27.9 .735
> > -H 171.4 39.0 24.45 42.26 349.4 MAR. 10.0 .536
> > -P 150.6 23.7 25.65 42.34 333.7 FEB. 22.3 .556
> > Q+ 107.6 -21.0 30.74 41.77 115.1 JULY 17.7 .053
> > B+ 107.5 -21.1 30.62 41.66 115.1 JULY 17.7 .053
> > W+ 108.9 -25.2 29.74 41.77 115.1 JULY 17.7 .120
> > A+ 99.8 -25.9 30.80 41.77 106.5 JULY 8.6 .106
> > H+ 105.0 -24.5 29.64 41.77 109.6 JULY 11.9 .071
> > P+ 107.1 -22.2 29.84 41.77 112.4 JULY 14.8 .048
> >--------------------------------------------------------------------
> >FIRST/SECOND (-/+) SET OF DATA CONCERNS THE PRE-/POST-PERIHELION ARC
> >
> where the 'D-DISC' is supposed to be the D criterion of
> Southworth&what'shisname.
>
> D values of less than 0.1 are said to be "good", and those of greater than
> 0.5 quite bad, so I'll leave it for other's to decide.
>
> Note the letters at left denote method used, but I'd have to go away and
> look up what they mean. - means "pre-perihelion", + "post-perihelion"...
> with an orbit this eccentric, only post-perihelion makes any sense this
> year anyway [due to long period of comet].
>
> Basically, the best bets equate to a radiant in Canis Major in mid-July,
so
> nobody hold there breath :(
>
> Someone else may know different.
>
> Cheers
>
> John
>
> JG , UK
>
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