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(meteorobs) Observation Apr 10/11 1999
The following night, April 10/11, I headed out again to Casselman to
observe about 3 hours teff. I took a break to nap between 5:10-5:45 UT. At
one point, I was startled by a strange noise right beside me, but soon
realized it was just a telescope dewcap rolling on the ground from the
wind. Skies were good with limiting magnitude of almost 6.3. I again
concentrated on the Virginids, and tried to determine whether the activity
came from the IMO radiant or the anthelion radiant.
The very first meteor I saw was certainly the highlight of the night. 24
minutes after I began, a gorgeous earthgrazer appeared! It was a slow
moving, 60 degrees long sporadic that began in the north-west and headed
south. It began as magnitude +1, but gradually brightened on the second
half of its path to yellow/orange magnitude -3. Despite the slow velocity,
a definite 1 second train was seen. The meteor itself lasted a good 4 or 5
seconds.
A total of 19 meteors were all plotted. With the 2 Virginids I saw, one
aligned with IMO and the other from the anthelion. One of these Virginids
also aligned with the Mu Virginids. All other meteors were sporadics.
DATE: April 10/11 1999
BEGIN: 4:00 UT (00:00 EDT) END: 8:00 UT (4:00 EDT)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -75.063 West; Lat: 45.269 North Elevation:100m
City & Province: Casselman, Ontario, CANADA
RECORDING METHOD: talking clock/tape recorder
-----------------------------------------------------------------------
OBSERVED SHOWERS: 3-letter code; radiant position
VIR (Virginids) 203 -7
MVI (Mu Virginids) 14h50 -2
-----------------------------------------------------------------------
OBSERVING PERIODS: 0 = none seen; / = shower not watched.
PERIOD(UT) FIELD Teff F LM SPO VIR
4:00-5:10 SE60 1.07 1.00 6.29 5 0
5:45-6:50 " 1.02 1.00 6.28 5 1
6:50-8:00 " 1.05 1.00 6.28 7 1
---------------------------------------------------------
TOTALS: 3.14 17 2 = 19
---------------------------------------------------------
MAGNITUDE DISTRIBUTIONS:
SHOWER -3 -2 -1 0 1 2 3 4 5
SPO 1 0 0 0 2 3 3 3 5
VIR 0 0 0 0 0 0 0 2 0
-----------------------------------------
TOTALS: 1 0 0 0 2 3 3 5 5
-----------------------------------------
SKY OBSCURED: none
--------------------------
Total dead time: 16.75 minutes
Dead time plots: 19 plots --> total time plotting: 15.75 minutes
Breaks: 5:10-5:45, -1 min teff
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REMARKS
Meteor#1 (4:24) was long 60 deg path with 4-5 sec dur
Meteor#10 (6:26) Virginid from anthelion radiant (214 -13)
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