Observations 29 APRIL and 04 MAY 2013
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Cosatrak 1 (Computerised satellite Tracking System).
FLI ML8300M CCD camera with mechanical shutter + Trimble GPS
Used with 102mm aperture f/5 SKYWATCHER refractor.
Field of view 123 x 93 arc minutes.
Image scale 8.86 arc sec/pixel.
Images processed and measured with APEX.
Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg,
Elevation 10 metres-situated in Pinelands (Cape Town),South Africa
FOR CLASSFD.TLE:
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35815 09 047A 0433 E 20130429173532453 16 15 1120178+053241 18 +120 02
35815 09 047A 0433 E 20130504165259293 16 15 1057248+052939 77 +130 03
STRAYS SEEN:
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14115 82 093F 0433 E 20130429173532453 16 15 1120092+053641 38 +134 05
25740 99 027A 0433 E 20130429173532453 16 15 1118313+052739 97 +110 02
25740 99 027A 0433 E 20130504165259293 16 15 1055244+052532 77 +116 01
26590 00 068A 0433 E 20130429173532453 16 15 1120469+052859 18 +127 14
26590 00 068A 0433 E 20130504165259293 16 15 1057471+052719 77 +133 01
NOTES:
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(1) As a result of Ian Roberts reporting that PAN was near INTELSAT 12
I reexamined my observations made on the 29th April and on the 4th
May and found that I had observed PAN on both occassions - the first
time I misidentified it and in the case of the 4th May I failed to
mark PAN and INTELSAT 12 for measuring(!) - I only see a part of the
image when I mark geosats for measuring as the image is too big for
the computer monitor and only marked NIMIQ 1.
Herewith are the amended observations which confirm Ians discovery.
I make PAN between NIMIQ 1 and INTELSAT 12.
If I had been more careful/alert I could have saved myself a great
deal of unnecessary work !!!
(2) Now as to my report that PAN was near YAMAL 404 - this is a real
mystery. In the image taken on the 29 April there were only 4
satellites in the cluster - SPACETRACK predicted 5 - no sign of
GSAT 8. However on the 4th May there were 5 satellites so naturally
I suspected PAN whereas it turns out it was GSAT 8- so where was
GSAT 8 on the 29th ? All five satellites are bright geostationaries
and none were near eclipse. I have observed GSAT 8 on quite a few
occassions and it has never shown signs of variability so what
happened on the 29th April ?
Cheers
Greg
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This archive was generated by hypermail 2b29 : Wed May 08 2013 - 08:05:50 UTC