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(meteorobs) Observation August 10/11 2001
Here is my report for August 10/11. Since the NIA, SIA and NDA
radiants are so close together, and because I'm simply doing cord
alignment during busy nights, I decided that any candidate I might
see would be easier to include them all into the NIA (anthelion)
activity.
The conditions were transparent last night with LM=6.35, given that
the Milky Way was still quite obvious despite the moonrise. With over
one hour tEFF, I recorded 16 meteors. As noted earlier, highlights
included the magnitude -5 Perseid fireball and after I had
"signed-off", ...the tight cluster of Perseids seen flying perfectly
simultaneous. The magnitude -3 Kappa Cygnid has a small chance of
being photographed, but I think it may have been just out of my
camera's frame.
Pierre
DATE: August 10/11 2001
BEGIN: 2:15 UT (22:15 EDT) END: 3:25 UT (23:25 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
PER (Perseids) 02h52 +59
SDA (S. Delta Aquarids) 23h20 -14
NDA (N. Delta Aquarids) 22h22 -06
CAP (Alpha Capricornids) 21h05 -05
SIA (S. Iota Aquarids) 22h28 -13
NIA (N. Iota Aquarids) 22h25 -11
PAU (Pisces Austrinids) 23h25 -28
KCG (Kappa Cygnids) 18h45 +56
-----------------------------------------------------------------------
OBSERVING PERIODS: 0 = none seen; / = shower not observed
PERIOD(UT) FIELD Teff LM SPO PER KCG SDA CAP NIA PAU
2:15-3:25 21h18 +62 1.15 6.35 4 11 1 0 0 0 0
----------------------------------------------------------
TOTALS: 1.15 4 11 1 0 0 0 0 = 16
--------------------------------------------------------------------------
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 -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 AVERAGE
SPO 0 0 0 0 0 0 0 0 1 2 1 +4.0
PER 1 0 0 0 1 0 1 3 1 3 1 +1.9
KCG 0 0 1 0 0 0 0 0 0 0 0 -3.0
-------------------------------------------------
TOTALS: 1 0 1 0 1 0 1 3 2 5 2
-------------------------------------------------
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: 1.25 minute
Breaks: 2:36 (30sec), 2:51 (30sec), 3:15 (15 sec)
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