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(meteorobs) C/2001 J1
These elements have just been released by the MPC, but note the orbital arc
is still only 5 days!!!
http://cfa-www.harvarddot edu/mpec/K01/K01J34.html
using Neslusan's software gives these results:
(pre-perihelic arc orbital perigee 0.0023 AU, post-perihelic 0.0005 AU)
EQUINOX: 2000.0; DATA FOR YEAR: 2001/2
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METH. ALPHA DELTA VG VH L DATE-MAX. D-DISC.
-Q 251.1 69.2 5.51 29.81 197.9 OCT. 11.4 .002
-B 251.1 69.2 5.51 29.81 197.9 OCT. 11.4 .002
-W * THIS METHOD IS NOT APPLICABLE IN THAT CASE *
-A * THIS METHOD IS NOT APPLICABLE IN THAT CASE *
-H * THIS METHOD IS NOT APPLICABLE IN THAT CASE *
-P 250.5 69.5 5.51 29.78 197.8 OCT. 11.4 .007
Q+ 101.4 -72.6 5.50 29.77 17.9 APR. 7.9 .001
B+ 101.1 -72.6 5.50 29.77 17.9 APR. 7.9 .000
W+ * THIS METHOD IS NOT APPLICABLE IN THAT CASE *
A+ * THIS METHOD IS NOT APPLICABLE IN THAT CASE *
H+ * THIS METHOD IS NOT APPLICABLE IN THAT CASE *
P+ 101.4 -72.6 5.50 29.78 17.9 APR. 7.9 .001
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FIRST/SECOND (-/+) SET OF DATA CONCERNS THE PRE-/POST-PERIHELION ARC
THE BEST METHOD - PRE-PERIHELION ARC: B (D = .002)
- POST-PERIHELION ARC: B (D = .000)
Comet perihelion was late March and Earth was already beyond the April 8th
point by the time the comet had tracked past us.
So, showers this coming October, or more likely next April????? Who knows!
Lowest D-Disc values I've seen in a while. However, the comet is very
faint, being currently about mag 19 despite being only 1 AU distant.
Cheers
John
John Greaves
UK
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