Re: Search orbits for May 12 Titan
bjorn@tt-tech.se
Fri, 10 May 1996 16:03:48 +0100
NOSS 2-3 r 9.8 3.0 0.0 5.0
1 80000U 80000 A 96133.79166667 .00000000 00000-0 00000-0 0 09
2 80000 63.4175 235.3130 0291700 163.0000 322.0000 15.33000000 01
Lacrosse 3 r 9.8 3.0 0.0 5.0
1 80001U 80001 A 96133.79166667 .00000000 00000-0 00000-0 0 01
2 80001 67.9810 231.5430 0187200 179.0000 308.0000 15.06000000 08
These elsets should be slightly more predictive for a 1900 UT launch.
I use a rule of thumb for heavy payloads: A satellite in the target
orbit would pass 1 degree W of the launch pad 4 minutes after launch.
Europe should see it exit shadow at about 42 N, 5h 56 m after launch,
or 44 N, 6h 02m after launch respectively.
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I am building a new web page ~b_gimle/lostfoun.htm where my
investigations, speculations, and links to other discussions
about KH 11 orbits etc.are being added.
Now, I am checking the first single pass observations in April
by me and Rainer Kracht, that do not agree with current orbits.
A preliminary result are:
1. It is possible for my first Apr.10 observation to be of
an object in a typical KH 11 orbit.
2. An orbit, with the same apogee height as the 23728 orbit,
and reaching its apogee on Apr.13 at 20:53 UT - which is
when 23728 reached its apogee - is also possible.
3. However, an orbit matching my observation is about 4 degrees
west of the 23728 orbit, which would need a very large cross-
track impulse to obtain.
4. An orbit matching my observation is also about 4 degrees west
of the estimated 22251 orbit, if it wasn't maneuvred more than
KH 11-8 during our winter.
5. My current speculation is that USA 86 is the object now tracked.
The object observed on Apr.10 was USA 116, at 400 km altitude
29 E, 64 N at 21:58 UT.
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