[Prev][Next][Index][Thread]
(meteorobs) Observation June 24/25 2003
On Wednesday morning June 24/25, I went to Casselman for a 2 hours
TEFF of meteor observing. The skies were clear however a little bit
of haze near the horizons. It was a very warm night, however
slightly windy. Only a light sleeping bag was needed to observe
comfortably.
Despite a decent sky, meteor activity was very dull the first hour.
Only one out of the four meteors seen in that period went near the
center of my field of view. At one point a full half hour went by
without a single meteor. I was surprised at the inactivity
especially since I was fully awake.
Fortunately, things got a little better in the second hour with a few
more sporadics and a Sagittarid (antihelion).
There wasn't much in terms of highlights, mostly faint meteors. None
were brighter than mag +2.
It was still a very enjoyable night under a decent clear sky and warm
temperatures. Mars was looking beautiful as an orange beacon coming
up low in the south-east.
Clear skies,
Pierre Martin
Ottawa, Ontario
DATE: June 24/25 2003
BEGIN: 0425 UT (0025 EST) END: 0628 UT (0228 EST)
OBSERVER: Pierre Martin (MARPI)
LOCATION: Long: -75.063 West; Lat: 45.269 North Elevation: 50m
City & Province: Casselman, Ontario, CANADA
RECORDING METHOD: talking clock/tape recorder - plotting method
-----------------------------------------------------------------------
OBSERVED SHOWERS:_______________________________________radiant position
ANT (antihelion source - Sagittarids)__________1900 -23
TOP (Theta Ophiuchids)_________________________1608 -12
TAQ (Tau Aquarids)_____________________________2220 -15
napx (sporadics from the north apex)___________0000 +15
sapx (sporadics from the south apex)___________0000 -15
SPO (random sporadics)
-----------------------------------------------------------------------
OBSERVING PERIODS: 0 = none seen; / = shower not observed
PERIOD(UT)__FIELD____Teff__LM____SPO_ANT_TOP_TAQ_napx_sapx
0425-0526__1859+15__1.01__6.23___4___0___0___0____0___/
0526-0628__1946+10__1.01__6.25___6___1___0___0____0___0
TOTALS:_____________2.02________10___1___0___0____0___0 = 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). 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
______+2__+3__+4__+5_____AVE
SPO____4___3___2___1____+3.00
ANT____0___1___0___0____+3.00
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
Corresponding F value: 1.00 for this session.
------------------------
Dead time: 2 minutes (1.74 min for plots)
Breaks (UT): 5:18 (15sec)
---------------------------------------------------------------------
The archive and Web site for our list is at http://www.meteorobs.org
To stop getting all email from the 'meteorobs' lists, use our Webform:
http://www.meteorobs.org/subscribe.html