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(meteorobs) Observation October 5/6 2002
Hi everyone,
Here's my meteor report for the Saturday morning Oct 5/6. The sky
cleared shortly before midnight and was quite decent all the way till
dawn. I got in almost 5 hours TEFF during the predawn hours from the
Casselman site. During that period, I recorded a total of 73
meteors. The vast majority were sporadics, but there was also
activity coming from other sources. The antihelion source (Taurids)
were producing some meteors all night. The surprise was the
appearance of 6 early Orionids, including 4 of them seen during the
third hour. I was using the plotting method.
Among the highlights was a foreshortened meteor from the antihelion
source that was very near the radiant. Moved only about one degree.
However, a meteor at 8:18UT (rather faint at mag +4) traced a long 30
degrees path near the zenith, and flared 3 times before it
disappeared!
The brightest meteor seen was a mag -1 yellow sporadic at 4:35UT that
left behind a one second train.
Pierre Martin
Ottawa, Ontario
DATE: October 5/6 2002
BEGIN: 0300 UT (2300 EDT) END: 0905 UT (0505 EDT)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -75.063 West; Lat: 45.079 North Elevation: 50m
City & Province: Casselman, Ontario, CANADA
RECORDING METHOD: talking clock/tape recorder - Plotting method
-----------------------------------------------------------------------
OBSERVED SHOWERS:_______________________________________radiant position
ANT (antihelion source - N. & S. Taurids)______0152 +11
ORI (Orionids)_________________________________0540 +14
DAU (Delta Aurigids)___________________________0600 +49
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
0300-0402___0154+20__0.98__6.33__7___1___0___1____0____0
0406-0510___0259+21__1.00__6.38__9___3___0___0____0____0
0510-0610___0404+22__0.94__6.38__7___3___4___0____2____0
0702-0803___0537+21__1.00__6.35__10__1___0___0____1____1
0806-0905___0651+21__0.92__6.35__13__1___2___0____6____1
TOTALS:______________4.84________46__9___6___1____9____2 = 73
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: -1(1) 0(2) +1(1) +2(8) +3(11) +4(23) +5(11) AVE: +3.44
ANT: -1(0) 0(1) +1(1) +2(2) +3(00) +4(03) +5(02) AVE: +3.00
ORI: -1(0) 0(0) +1(0) +2(2) +3(01) +4(01) +5(02) AVE: +3.50
DAU: -1(0) 0(0) +1(0) +2(0) +3(00) +4(00) +5(01) AVE: +5.00
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:
None
Corresponding F value for this session is 1.00
------------------------
Dead time:
- 5 minutes used for breaks.
- 10.27 minutes used for plots.
TOTAL DEAD TIME: 15.27min.
Breaks (UT): 3:30-32, 4:02-06, 4:45-46, 5:01-02, 6:10-7:02, 8:03-06, 9:01-02
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