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(meteorobs) Ursids Peak report - Basically inactive.
Looks like another "Dud". I observed for 2.5hr Teff around the
expected peak time (0540-0830 UT Dec 22) under pretty good
conditions, and saw just 4 URS out of total of 33 meteors... And 3
of them were mag 5!
Despite the fairly low radiant elevation, I was expecting to see
much more based on the predictions. The sky conditions were
fairly good, but a thin high cloud layer kept the LM below 6.5 (the
normal clear sky LM at Joshua Tree). The clouds reflected a lot of
light, and showed how much light pollution now encroaching from
Palm Springs and Indio.
And on the drive out there, I was listening to KNX Newsradio and
they had a short feature on tonights "Ursid meteor storm". They
said to expect one meteor per minute starting at exactly 11:39pm.
Whoops - Another case of bad media hype and inaccuracy. No
wonder people don't believe in meteor showers anymore :(
On to the Quads!
And Merry Xmas to all.
Mike.
REPORT FOLLOWS:
================
OBS: Mike Linnolt (LINMI)
DATE: Dec. 22, 2000
TIME: 0540 - 0830 UT (09:40pm - 00:30am PST night of Dec 21/22)
LOC: Joshua Tree Nat'l Park, CA (33° 44' N, 115° 49' W)
ELEV: 1000m ?
Conditions: Mostly Clear. Temp 50F. RH 30%. Winds calm.
METHOD: Paper
Observing Periods Summary:
==========================
# Period(UT) FOV Teff F LM URS ZPU COM APXs ANT SPO
---------- --- ---- - --- --- --- --- --- --- ---
1 0540-0642 06h+20 1.00 1.00 5.6 2 0 0 0 2 7
2 0650-0752 06h+40 1.00 1.00 6.1 1 0 3 0 2 9
3 0758-0830 07h+40 0.50 1.00 6.0 1 0 1 0 0 5
*COM = APX (north) (IMO designation)
Periods Detail:
===============
Period #1:
----------
Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6 elev r ZHR
------------------------------------------------------
URS: 0 0 0 0 0 0 0 0 2 0 = 2 22° 3.0 14.3 +/-10.1
ZPU: 0 0 0 0 0 0 0 0 0 0 = 0
COM: 0 0 0 0 0 0 0 0 0 0 = 0
APXs 0 0 0 0 0 0 0 0 0 0 = 0
ANT: 0 0 0 0 0 0 0 2 0 0 = 2
SPO: 0 0 0 0 0 1 2 2 2 0 = 7
DEAD TIME: 2 min
Note: Thin high clouds reduced LM.
Period #2:
----------
Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6 elev r ZHR
------------------------------------------------------
URS: 0 0 0 0 0 0 0 0 1 0 = 1 24° 3.0 3.8 +/-3.8
ZPU: 0 0 0 0 0 0 0 0 0 0 = 0
COM: 0 0 0 0 0 0 1 1 1 0 = 3
APXs 0 0 0 0 0 0 0 0 0 0 = 0
ANT: 0 0 0 0 0 1 1 0 0 0 = 2
SPO: 0 0 0 0 1 1 1 3 3 0 = 9
DEAD TIME: 2 min
Note: High clouds decreased this period.
Period #3:
----------
Mag -3 -2 -1 0 +1 +2 +3 +4 +5 +6 elev r ZHR
------------------------------------------------------
URS: 0 0 0 0 0 0 1 0 0 0 = 1 26° 3.0 7.9 +/-7.9
ZPU: 0 0 0 0 0 0 0 0 0 0 = 0
COM: 0 0 0 0 0 0 0 1 0 0 = 1
APXs 0 0 0 0 0 0 0 0 0 0 = 0
ANT: 0 0 0 0 0 0 0 0 0 0 = 0
SPO: 0 0 0 0 1 0 2 1 1 0 = 5
DEAD TIME: 2 min
END OF REPORT.
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