(meteorobs) Observation September 10/11 2004

Pierre Martin dob14.5 at sympatico.ca
Sat Sep 18 11:11:01 EDT 2004


Greetings,

Here's my meteor report for last Friday Sept 10/11.  It was one of the 
best nights I've seen at the Foymount site (located west of Ottawa).  
The skies were very transparent, and the weather comfortable and quite 
dry.  The zodiacal band (gegenshein) was faintly visible along the 
ecliptic and M33 was also visible with averted vision.  In two and a 
half hours teff, I recorded a total of 32 meteors.

Two Aries-Triangulids were plotted.  A few other candidates were 
possibly seen casually earlier in the night.

The surprise for me was to plot as many as five meteors that radiated 
from an area between the Pleiades and Aldebaran.  This would seem to be 
the September Taurids proposed by Stephen James O'Meara in Sky & Tel 
Magazine.  The meteors I plotted were all swift and did *not* align 
reasonably enough with either the north or south apex sources.  For my 
reports, I labelled these as SET.

The highlights included a beautiful turquoise colored mag +1 very slow 
sporadic at 1:31 EDT that went 20 degrees, and at 1:48 EDT with a brief 
but intense mag -2 blue antihelion (Piscid) in the south with 1 sec 
train.

Pierre Martin
Ottawa, Ontario



DATE: September 10/11 2004
BEGIN: 0500 UT (0100 EDT)  END: 0900 UT (0500 EDT)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -77.304 West; Lat: 45.431 North  Elevation: 1800 ft
City & Province: Foymount, Ontario, CANADA
RECORDING METHOD: talking clock/tape recorder, plotting
-----------------------------------------------------------------------

OBSERVED SHOWERS:_____________________________________radiant position
		KAQ (Kappa Aquarids)___________________________22:12 -07
		ANT (antihelions or Piscids)___________________00:16 +02
		ATR (Aries-Triangulids)________________________02:00 +29
		DAU (Delta Aurigids)___________________________04:08 +47
		NPX (sporadics from north apex)________________05:16 +38
		SPX (sporadics from south apex)________________05:16 +08
		SET (possible September Taurids?)______________?
		SPO (random sporadics)
-----------------------------------------------------------------------

OBSERVING PERIODS: 0 = none seen;  / = shower not observed

PERIOD(UT)_FIELD____Teff__LM____KAQ_ANT_ATR_DAU_NPX_SPX_SET_SPO

0500-0600__0236+31__0.84__6.86___0___1___0___1___0___0___3___5
0619-0711__0322+27__0.81__6.90___0___0___2___1___0___1___2___5
0813-0900__0442+22__0.78__6.53___0___1___0___0___2___1___0___7

TOTALS:_____________2.43_________0___2___2___2___2___2___5___17 = 32

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).  The next column (LM) is the average naked eye limiting 
magnitude, determined by triangle star counts. All following columns 
indicate the number of meteors for each shower observed.
------------------------

MAGNITUDE DISTRIBUTIONS:

SHOWER
______-2__-1___0__+1__+2__+3__+4__+5__+6______AVE

SPO____0___0___0___2___5___5___5___3___1_____+3.24
ANT____1___0___0___0___0___0___1___0___0_____+1.00
ATR____0___0___0___0___0___0___1___0___1_____+5.00
DAU____0___0___0___0___1___0___0___1___0_____+3.50
SET____0___0___1___1___1___0___0___2___0_____+2.60

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 (FOV): None

------------------------

Dead time: 11 min. for total (9.75 min plots)

Breaks (UT): 5:45 (20sec), 6:00-19, 6:23 (30sec), 7:11-8:13, 8:37 
(30sec)
-------------------------




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