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(meteorobs) Observation June 11/12 2001
Hi everyone,
June has been a fantastic month for observing in Ottawa, Ontario. We
had lots of hot sunny days and clear warm nights. On some occasions,
it was so warm (lows of 25C) that I could observe comfortably in
t-shirt. I was able to get successful meteor observing runs for June
Lyrids/Xi Draconids and for the June Bootids. During nearly every
night I was out, I had the company of several observers also setup at
Casselman (about 50km south-east of Ottawa) with their telescopes, so
it was quite enjoyable.
The first night out this month was on June 11/12. I observed only 1
hour from the Casselman site under slightly hazy skies. I intended to
stay longer but unfortunately a cloud bank moved in from the
north-east. I observed and plotted low rates from all active sources
except for Theta Ophiuchids. Plotting chart #3 is interesting because
all 4 meteors align with the June Lyrids radiant (although one of
them was too slow and turned out to be a SAG). The highlights were
sporadics at 3:52UT with a 20 degrees long orange magn -1 and at
4:19UT with a blue magn -1 meteor.
At 3:23UT, had a nice magn -5 satellite flare, and 4:21UT saw a magn
-4 iridium satellite.
Full reports and plots will be sent to NAMN.
Pierre Martin
Ottawa, Ontario
DATE: June 11/12 2001
BEGIN: 3:15 UT (23:15 EDT) END: 4:22 UT (0:22 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
SAG (Sagittarids) 18h00 -23
JLY (June Lyrids) 18h15 +35
XDR (Xi Draconids) 18h15 +54
TOP (Theta Ophiuchids) 16h30 -16
-----------------------------------------------------------------------
OBSERVING PERIODS: 0 = none seen; / = shower not observed
PERIOD(UT) FIELD Teff F LM SPO XDR JLY SAG TOP
3:15-4:22 17h00 +30 1.04 1.00 6.13 4 2 2 1 0
--------------------------------------------------------------
TOTALS: 1.04 4 2 2 1 0 = 9
--------------------------------------------------------------
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
(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 -1 0 +1 +2 +3 +4 AVERAGE
SPO 2 0 0 0 1 1 +1.25
XDR 0 0 0 1 1 0 +2.5
JLY 0 0 0 1 0 1 +3.0
SAG 0 0 0 0 0 1 +4.0
-----------------------------
TOTALS: 2 0 0 2 2 3
-----------------------------
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): 4.74 minutes total
including 2.74 minutes for plotting meteors
Breaks: 4:17 to 4:19
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