[AZ-Observing] Re: Geminid and Ursid meteors

  • From: "Jack Jones" <Telescoper@xxxxxxx>
  • To: <az-observing@xxxxxxxxxxxxx>
  • Date: Mon, 11 Dec 2006 20:22:46 -0700

Thanks for the info. I saw two bright ones last night in a few minutes without 
even trying about 10pm. Long and slow without much trail. Yellowish. Tonight 
should be better as they ramp up to the peak on 13/14. S&T article Dec 2006 
p72 with a nice plot but don't understand about 'braving the cold' and 
'freezing in the dark' they mention. Brian?

Jack Jones
Public Events Coordinator
Saguaro Astronomy Club
Phoenix AZ
Telescoper@xxxxxxx
www.saguaroastro.org


----- Original Message ----- 
From: "Brian Skiff" <bas@xxxxxxxxxx>
To: <amastro@xxxxxxxxxxxxxxx>; <az-observing@xxxxxxxxxxxxx>
Sent: Monday, December 11, 2006 7:19 PM
Subject: [AZ-Observing] Geminid and Ursid meteors


>     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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> 


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