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(meteorobs) Observation October 9/10 2002
Hi all,
Here is my meteor observation from the evening of October 9/10. I
watched from the new Cobden site (located just west of Ottawa) in
case of any possible late Giacobinid activity.
The sky conditions were far from ideal, with several cloudy periods
and high humidity in the atmosphere. However, there was still some
good clear breaks that allowed me to get almost 2 hours of
observations. I was forced to a number of breaks whenever cloud
obstruction got worse than 20% in my field of view. For this
session, I faced the north-west in the direction of the GIA radiant.
No Giacobinids were seen. Other activity was a bit on the low side
with just a few sporadics and one Taurid.
While on break at 3:23UT, a fast yellow sporadic of magnitude -1 was
seen through the clouds. It had a small terminal flare.
I ended my observation just after local midnight, with an improved
clear sky.
Pierre Martin
Ottawa, Ontario
DATE: October 9/10 2002
BEGIN: 0200 UT (2200 EDT) END: 0410 UT (0010 EDT)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -76.88 West; Lat: 45.63 North Elevation: 50m
City & Province: Cobden, Ontario, CANADA
RECORDING METHOD: talking clock/tape recorder - Plotting & cord align method
-----------------------------------------------------------------------
OBSERVED SHOWERS:_______________________________________radiant position
ANT (antihelion source - N. & S. Taurids)______0152 +11
ORI (Orionids)_________________________________0540 +14
DAU (Delta Aurigids)___________________________0600 +49
GIA (Giacobinids)______________________________1750 +54
napx (sporadics from the north apex)___________0652 +38
sapx (sporadics from the south apex)___________0652 +08
SPO (random sporadics)
-----------------------------------------------------------------------
OBSERVING PERIODS: 0 = none seen; / = shower not observed
PERIOD(UT)__FIELD____Teff__LM____SPO_ANT_ORI_DAU_napx_sapx_GIA
0200-0304___1929+51__0.98__6.10__4___0___/___0____0____/____0
0309-0410___2045+57__0.90__6.13__2___1___/___0____0____/____0
TOTALS:______________1.88________6___1___/___0____0____/____0 = 7
The first column (Period UT) refers to observing periods broken down
as close as possible to one hour of true observing, in Universal
Time. The second column (Field) is the area in in the sky where I
centered my field of view. The third column (TEFF) represents
effective observing time (corrected for breaks or any time I did not
spent looking at the sky). One hour = 1.00 teff. The fourth column
(LM) is the average naked eye limitimg magnitude, determined by
triangle star counts. All following columns indicate the number of
meteors for each shower observed.
------------------------
MAGNITUDE DISTRIBUTIONS:
SHOWER
SPO: +2(2) +3(1) +4(1) +5(2) AVE: +3.50
ANT: +2(1) +3(0) +4(0) +5(0) AVE: +2.00
Note: Magnitude scale is to determine the brightness of sky objects.
Magnitude -8 is comparable to a quarter moon, magnitude -4 with the
planet Venus, magnitude -1 with the brightest star Sirius, magnitude
+2 to +3 with most average naked eye stars and magnitude +6 to +7 are
the faintest stars the naked eye can see under typical dark
conditions. A meteor of at least magnitude -3 is considered a
fireball. The above table contains the magnitudes from all observed
meteors, and the average (last column) for showers.
------------------------
SKY OBSCURED (FOV):
15% from UT 2:19-2:29
20% from UT 2:34-2:43
10% from UT 2:48-2:58
5% from UT 3:09-3:12
20% from UT 3:25-3:34
15% from UT 3:38-3:50
Corresponding F value:
1.09 for Period UT 0200-0304
1.09 for Period UT 0309-0410
------------------------
Dead time:
12 minutes used for breaks.
TOTAL DEAD TIME: 12 min.
Breaks (UT): 2:43-2:48, 3:04-3:09, 3:22-3:25, 3:34-3:38
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