(meteorobs) Observation May 7/8 2005

Pierre Martin dob14.5 at sympatico.ca
Wed May 18 13:50:48 EDT 2005


For a short period right before dawn, I enjoyed some more early morning 
meteor observing.  I got in a few very nice meteors, including two 
impressive earthgrazers only 2 minutes apart from each other (one being 
an Eta Aquarid and the other a sporadic).

Clear skies!

Pierre Martin
Ottawa, Ontario


DATE: May 7/8 2005
BEGIN: 0516 UT (0116 EDT)  END: 0815 UT (0415 EDT)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -76 29' West; Lat: 46 59' North  Elevation: 400m
City & Province: Réserve Faunique La Vérendrye, Québec, CANADA
RECORDING METHOD: talking clock/tape recorder, plotting & cord align
-----------------------------------------------------------------------

OBSERVED SHOWERS:_____________________________________radiant position
		ETA (Eta Aquarids)_____________________________22:40 -01
		IAA (Eta Lyrids)_______________________________19:08 +44
		SAG (Sagittarids - ANT)________________________16:08 -20
		SPO (random sporadics)
-----------------------------------------------------------------------

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

PERIOD(UT)_FIELD____Teff__LM_____ETA_IAA_SAG_SPO

0516-0815__1915+20__1.36__6.56____2___1___2___6  = 11

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
_______0__+1__+2__+3__+4__+5_____AVE

SPO____0___0___0___3___2___1_____+3.66
SAG____0___0___1___0___0___1_____+3.50
IAA____0___0___0___0___1___0_____+4.00
ETA____1___0___1___0___0___0_____+1.00

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 (FOV): None

F = 1.00

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

Dead time: 95.5 min breaks + 1.5 min plots = 97 min total

Breaks (UT): 5:47-6:06, 6:25 (30sec), 6:32-7:48

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



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