[AZ-Observing] Geminid and Ursid meteors
- From: Brian Skiff <bas@xxxxxxxxxx>
- To: amastro@xxxxxxxxxxxxxxx, az-observing@xxxxxxxxxxxxx
- Date: Mon, 11 Dec 2006 19:19:45 -0700 (MST)
From a Central Bureau Electronic Circular issued this evening:
GEMINID AND URSID METEORS 2006
P. Jenniskens, SETI Institute, reports that the Geminid meteors from
(3200) Phaethon should peak at ZHR = 130 +/- 20 meteors/hr on 2006 Dec.
14d08h48m UT, with a FWHM of 26 hr....A waning 31-percent
crecent moon will not interfere before 1 a.m. local time. Meteors should
radiate from a geocentric radiant of R.A. = 113.8 deg, Decl. = +32.4 deg
(equinox 2000.0), with velocities of V_g = 34.6 km/s.
[In re Ursids, a comet dust-trail of 8P/Tuttle should encounter
Earth] ...around 2006 Dec. 22d19h27m UT,
with meteoroids in the earth's path between 18h10m and 20h50m...
Meteors should radiate from a geocentric radiant of R.A. = 217.56 deg,
Decl. = +74.93 deg (equinox 2000.0), with velocities of V_g = 33.83 km/s.
...A predicted peak rate of ZHR around 35 meteors/hr would be about
three times that of the annual Ursids.
...it is possible that a broader (FWHM = 8.5 hr) filament dust
component will return, peaking at around 2006 Dec. 22d17h38m
with ZHR around 39 meteors/hr...
\Brian
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