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(meteorobs) Observation July 24/25 2001
On July 24/25, I watched for one hour TEFF at the lagoon site (40km
south-east of Ottawa) near Casselman. Had the company of Denis
Legault who was setup with a 14" dobsonian. I recorded 11 meteors.
The best one was a magnitude -3 blue-white sporadic that travelled
quickly from the north directly overhead. The only shower member seen
was a single North Delta Aquarid - all others were spoardics.
Pierre Martin
DATE: July 24/25 2001
BEGIN: 4:23 UT (0:23 EDT) END: 5:30 UT (1:30 EDT)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -75.063 West; Lat: 45.269 North Elevation:100m
City & Province: St-Albert, Ontario, CANADA
RECORDING METHOD: talking clock/tape recorder
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OBSERVED SHOWERS: 3-letter code; radiant position
NDA (N. Delta Aquarids) 21h30 -09
SDA (S. Delta Aquarids) 22h22 -17
SIA (S. Iota Aquarids) 21h25 -18
SIG (Sigma Capricornids - ANT) 20h55 -17
CAP (Alpha Capricornids) 20h03 -12
PAU (Pisces Austrinids) 22h25 -32
PER (Perseids) 01h25 +52
ACY (Alpha Cygnids) 20h36 +49
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OBSERVING PERIODS: 0 = none seen; / = shower not observed
PERIOD(UT) FIELD Teff LM SPO SDA PER SIG CAP NDA SIA PAU ACY napx sapx
4:23-5:30 21h22 +19 1.05 6.35 8 0 0 0 0 1 0 0 0 2 0
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TOTALS: 1.05 8 0 0 0 0 1 0 0 0
2 0 = 11
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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 spent
not looking at the sky). One hour = 1.00 teff. The fourth column (F)
is for sky obstructions (clouds, buildings, ect). No obstructions =
1.00 but any obstructions will make this number slightly higher. The
5th 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 -3 -2 -1 0 +1 +2 +3 +4 +5 AVERAGE
SPO 1 0 0 0 0 2 1 5 1 +2.9
NDA 0 0 0 0 0 0 1 0 0 +3.0
--------------------------------------------
TOTALS: 1 0 0 0 0 2 2 5 1
--------------------------------------------
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 for showers.
SKY OBSCURED:
None
------------------------
Dead time (amount of time spent not looking up): 4 minutes
Breaks: 5:02-5:06
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