[FMO] Re: Radiant of 2005 QQ87 Re: 2005 QQ87: orbit integration results
- From: Marco Langbroek <marco.langbroek@xxxxxxxxxx>
- To: fmo@xxxxxxxxxxxxx
- Date: Fri, 02 Sep 2005 14:33:06 +0200
Ò wrote:
Hello Marco,
Thank you for your works. It seems nice, unfortunately, I'm
> afraid 0.08AU is still to far to produce visible meteor showers.
Yes, 0.08 AU is a borderline case. Certainly with asteroids. Also, 2005 QQ87 is
too small to be a likely parent body for a shower.
But maybe QQ has been this orbit for a very long time, it may
> produce some fireball when Earth passed the point.
Does anyone able to calculate when will the probable activity occur?
This is the output of Neslusan et al.'s software for theoretical meteor radiant
calculations:
EQUINOX: 2000.0; DATA FOR YEAR: 2005
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METH. ALPHA DELTA VG VH L DATE-MAX. D-DISC.
-Q 136.6 -57.1 19.60 33.14 335.1 FEB. 23.7 .195
-B 136.5 -54.7 20.06 33.66 335.1 FEB. 23.7 .190
-W 156.7 -51.6 19.50 30.08 335.1 FEB. 23.7 .260
-A 114.5 -32.5 16.84 30.27 277.9 DEC. 29.6 .498
-H 120.5 -29.9 14.99 30.27 290.0 JAN. 10.2 .406
-P 149.1 -55.3 18.96 30.13 327.7 FEB. 16.4 .219
Q+ 145.2 72.5 18.51 28.06 155.1 AUG. 28.4 .058
B+ 146.4 75.1 18.18 28.10 155.1 AUG. 28.4 .042
W+ 157.3 70.8 19.11 29.47 155.1 AUG. 28.4 .085
A+ 133.3 73.3 16.89 29.36 136.9 AUG. 9.4 .186
H+ 137.1 74.8 18.59 29.39 141.9 AUG. 14.6 .130
P+ 154.1 72.5 18.69 29.45 151.7 AUG. 24.9 .080
--------------------------------------------------------------------
FIRST/SECOND (-/+) SET OF DATA CONCERNS THE PRE-/POST-PERIHELION ARC
THE BEST METHOD - PRE-PERIHELION ARC: B (D = .190)
- POST-PERIHELION ARC: B (D = .042)
ADDITIONAL INFORMATION (for 2005):
(-) DIST. = 1.206 AU; DT = -64.5 DAYS; MIN. DIST. = .2019 AU
(+) DIST. = .082 AU; DT = -1.2 DAYS; MIN. DIST. = .0796 AU
This gives a theoretic maximum on August 28, with the radiant at RA ~145 (9h
40m), decl. +71 to +75. This is on the Ursa major-Ursa minor border, hence
circumpolar for northern latitudes > 35 degrees. With a geocentric velocity of
18-19 km/s, meteors would be very slow (comparable to October Draconids) and
experience considerable zenith-attraction when the radiant is low in the sky.
- Marco
-----
Dr Marco Langbroek
Dutch Meteor Society (DMS)
e-mail: meteorites@xxxxxxxxxx
DMS website: http://www.dmsweb.org
private website: http://home.wanadoo.nl/marco.langbroek
-----
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