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(meteorobs) UPDATE: Telescopic Meteor Report Form, GRALE, 06/07 Mar 2000
Thanks to some helpful comments by Malcolm Currie, I have made a few
modifications to the report on my 06/07 March telescopic observations.
In particular, to make sense of the plotted-meteor coordinates on the
form, special "fiduciary" cross-marks labeled A, B, C and D are placed
on each IMO Telescope Plotting Chart: distances between these, in mm,
must be measured and reported, so they can be used to calibrate the Xb,
Yb, Xe and Ye coordinates reported for each meteor on the plot charts.
Here's my next draft... When we have a final form for this report, I'll
do another report on some telescopic plots I did from the slopes of the
Mauna Kea volcano in Hawai'i (home of the Keck, Subaru and other Really,
Really Big Telescopes), during last year's Perseid meteor shower peak.
Then I'd also encourage others to take advantage of "slow meteor season"
in June, to get out and try using your binculars or small telescopes to
plot meteors with the IMO charts! As our thread on the "LINEARids" and
other obscure showers make clear, there's no telling what contribution
some of us may end up making with telescopes, after a few hours effort!
Clear skies,
Lew Gramer
================================================================================
DATE: 2000-03-06/07 OBSERVER: Lewis Gramer (GRALE).
LOCATION: Long 70o 40' 55"W; Lat 41o 51' 12"N; Elev 5m.
SITE: Myles Standish State Forest, South Carver MA USA.
INSTRUMENT: 127 cm f/5 altazimuth refractor.
MAGNIFICATION: 18x. True Field: 3.3 degrees.
LM: Telescopic >11.5, Visual =6.7 (IMO #10).
CONDITIONS: Possible FG, no wind, temp 38oF.
REMARKS: 120 sec dead-time deducted per plot.
Plots will be postal-mailed to Malcolm Currie.
Session #: 1 2
Begin UT: 0605 0710
End UT: 0644 0800
Duration(m): 39 50
Tot. Breaks(m): 0 8
Teff(-dead,h): 0.48 0.53
LM: >11.5 >11.5
Chart: TC103 TC147
X-reference: 001 002
Chart AB: 162.7 161.9
fiduciary BD: 161.1 161.1
distances DC: 161.9 161.9
(in mm) CA: 161.1 161.1
# Time Mag Vel Type Rel Tr Xb Yb Xe Ye Remarks
UT A-F I-III sec (In mm from lower left inner corner)
== ==== ==== == == === ==== ===== ===== ===== ===== ==============
1 0610 10.5 C? II I 99.5 112.5 93.5 114.0
2 0615 10 B II II 75.0 129.0 72.5 136.0
3 0622 9.5 C OI II 118.5 127.0 111.0 120.5
4 0628 5 A OO I 45.0 75.0 121.5 76.5 Very slow!
5 0635 3 D OO I 4.0 41.0 96.0 81.5 155.5 No color: Why?
== PAUSE
6 0715 10 E II II 99.5 94.5 105.0 94.0 My first Fast!
7 0721 9 D II II 110.0 108.0 113.5 103.0
8 0738 10 C II I 113.5 84.0 117.0 76.0
9 0752 11 D II I 128.5 74.5 129.5 80.0
10 0758 10.5 B II I 132.5 80.0 132.0 73.0
== END
================================================================================
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