KF Obs - 2006 May 01 UTC

From: Ted Molczan (seesat@rogers.com)
Date: Mon May 01 2006 - 07:14:11 EDT

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```I enjoyed Kevin Fetter's lunar transit videos, and the ability to make flash and
positional observations from his NOSS 3-3 r video:

http://satobs.org/seesat/May-2006/0000.html

28538 05 004B   1775 G 20060501070944943 56 25 1843408+384860 37 R        005300
28538 05 004B   1775 G 20060501070950815 56 25 1846489+364686 67 R        005300

Site 1775: 44.6062 N  75.6910 W  100 m

Thanks to algorithms provided by Scott Campbell last year, ObsReduce 1.3
supports position reductions from images. For example, for the first of the
above positions, I advanced the video until the satellite was surrounded by
three stars, which I designated in ObsReduce as A, B and C, then used a ruler to
measure the length of four line segments required by the algorithm. Three of the
segments are measured from the stars to the satellite, denoted as S. The details
are recorded in the observation log, as appended.

The algorithm also works with two stars, and accepts pixel coordinates as an
alternative to line segments.

ObsReduce is available here:

http://www.satobs.org/programs/ObsReduce/ObsReduce.html

Ted Molczan

2006 May 01  07:09:44.943 UTC   05004B    28538

Star A: 18:43:16.5708  +39:18:00.225  (2000.0) Mag 6.637
Star B: 18:44:05.1450  +38:31:59.100  (2000.0) Mag 6.754
Star C: 18:40:12.1970  +38:22:01.888  (2000.0) Mag 6.517

Length AB =  2.9800
Length AS =  1.9000
Length BS =  1.2000
Length CS =  2.9500

Object: 18:43:24.4848  +38:48:36.147  (2000.0)  +/- 0.005 deg (default)

Obs - Pred: 0.006 deg X-track; 0.047 s early, relative 9.41 day old elset:

1 28538U 05004B   06111.88862456 0.00000050  00000-0  84947-4 0    05
2 28538  63.8261 127.6526 0104000 136.2492 223.7508 13.42864127    00

28538 05 004B   1775 G 20060501070944943 56 25 1843408+384860 37 R        005300

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