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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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