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(meteorobs) Aug 12 obs DENDE
Activity was remarkably higher compared to the previous night.
Counted 140 meteors in 4 hours - new personal "high score" for
one night! Previous one was 105 meteors.
As it was noted since 1985, Perseids were often showing up in
pairs. Saw 6 couples like that last night with second meteor
in the pair appearing within 0 to 5 sec after the first one.
The show started with two simultaneous meteors just when the
minus 7 mag Iridium flare in Perseus was in progress!
The brightest meteor of the night, short one of -2 mag, left
persistent train for 10 seconds. No bolids were seen.
A couple of kappa-Cygnids in 4 hours would be quite silly
otherwise but were good for a change when compared to fast
Perseids. Nice to watch them falling slowly.
As a whole, with no any single cloud during last 3 nights and
no Moon interference it was one of the best Perseids maxima I
have managed to watch here in Moscow since 1985. Yet it was
warmer last night than on Sunday: T slowly decreased from +16
Centigrade in the evening downto +11C at the end of session.
Two nights ago it was as cold as +7.
--- Formal report follows ---
Observation date: August 12, 2002 UT
Observer: Denis Denissenko (DENDE), Russia
Location: Vlasovo (90km north from Moscow)
Lat, Long, Elev: 56o40'N, 37o52'E, 131 m
Showers: PER-Perseids, KCG-Kappa Cygnids,
NDA-Northern Delta Aquarids, SPO-Sporadics
Center of FOV: Az=90 (East), El=45
Clouds: none
Recording method: paper
Intervals T_eff M_lim N_tot N_Per
Time (UT) hrs m
----------------------------------------
1920-2020 1.00 5.8 31 28
2030-2130 1.00 6.0 38 33
2140-2240 1.00 6.0 36 35
2250-2350 1.00 6.0 35 33
----------------------------------------
Total 4.00 140 129
Comment: Perhaps one should take 6 sec of
"dead time" for each meteor from T_eff.
Probably I lost as much as 8 meteors while
writing down the data.
Magnitude distribution:
Shower -2 -1 0 1 2 3 4 Sum
---------------------------------
PER 1 5 9 13 37 42 22 129
KCG 0 0 0 1 1 0 0 2
NDA 0 0 0 0 2 1 1 4
SPO 0 0 0 1 0 2 2 5
---------------------------------
Total 1 5 9 15 40 45 25 140
Clear skies!
Denis Denissenko
P.S. Corrigendum to Aug 11 report:
Line for sporadics magnitudes should read
SPO 0 0 0 0 1 1 2 4
(there were 2 of them at 4th mag, not 3)
P.P.S. On Aug 10 night I have counted 37 meteors (28 Perseids)
during casual watch while observing with Moscow Astronomy Club
members.
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