Sunday, July 02, 2006

STS-121 NASA Estimated Orbital Elments



From Ted Molczan and the world famous Seesat-L newsgroup:

Lift-off is scheduled for 2006 Jul 02 at 19:26:06 UTC. Spaceflight Now reports that the weather forecast is for only a 30 percent probability of GO for launch:
http://www.spaceflightnow.com/shuttle/sts121/status.html NASA's estimated elements are available at the following URL. They take into account all planned manoeuvres, and are revised throughout the mission, as required.

http://spaceflight1.nasa.gov/realdata/sightings/SSapplications/Post/JavaSSOP/orb
it/SHUTTLE/SVPOST.html


For quick reference, I have extracted the elsets from MECO through docking.

1. Jul 02, 19:36:34 UTC (MECO) - Jul 02, 20:04:45 UTC

1 99999U 06183.81706019 .01000000 00000-0 37638-6 0 02
2 99999 51.6315 107.4812 0133623 347.8400 69.9204 16.48996984 09

NOTE: NASA's MECO 2-line elset is erroneous; so I generated the above by
converting NASA's True of Day Rotating (TDR) [aka Earth-Fixed Greenwich (EFG)] Cartesian state vector to SGP4, using Ken Ernandes' VEC2TLE program, and added realistic decay terms for the brief duration of existence of the orbit. Our web site has a link to Ken's program:

http://www.satobs.org/orbsoft.html#Other

2. Jul 02, 20:04:45 UTC - Jul 03, 11:25:57 UTC

1 99999U 06183.86828433 .00014500 00000-0 95600-4 0 9012
2 99999 51.6315 107.1944 0055919 341.8910 18.0289 16.30320029 25


3. Jul 03, 11:25:57 UTC - Jul 03, 16:01:09 UTC

1 99999U 06184.48096052 .00014500 00000-0 95600-4 0 9026
2 99999 51.6338 103.7803 0075880 339.8798 19.9405 16.25901597 126


4. Jul 03, 16:01:09 UTC - Jul 03, 21:02:19 UTC

1 99999U 06184.72675604 .00014500 00000-0 95600-4 0 9030
2 99999 51.6304 102.4155 0074319 340.6093 19.2273 16.26481625 165


5. Jul 03, 21:02:19 UTC - Jul 04, 11:20:37 UTC

1 99999U 06184.91191402 .00014500 00000-0 95600-4 0 9041
2 99999 51.6279 101.3924 0067724 147.0385 213.5038 15.93209272 193


6. Jul 04, 11:20:37 UTC - Jul 04, 12:51:50 UTC

1 99999U 06185.47638584 .00014500 00000-0 95600-4 0 9051
2 99999 51.6296 98.4155 0010064 87.8137 272.4181 15.78424640 289


7. Jul 04, 12:51:50 UTC - Jul 04, 14:11:14 UTC

1 99999U 06185.53969537 .00014500 00000-0 95600-4 0 9064
2 99999 51.6310 98.0883 0010018 46.9068 313.2933 15.76762016 298


8. Jul 04, 14:11:14 UTC - Jul 04, 14:25:06 UTC

1 99999U 06185.60307278 .00014500 00000-0 95600-4 0 9071
2 99999 51.6314 97.7612 0009245 38.9159 321.2669 15.76455737 306


9. Jul 04, 14:25:06 UTC - Jul 04, 15:40:00 UTC

1 99999U 06185.60307255 .00014500 00000-0 95600-4 0 9087
2 99999 51.6317 97.7611 0010246 36.0397 324.1457 15.76223425 308


10. Jul 04, 15:40:00 UTC (docked to ISS)

1 99999U 06185.66721116 .00014500 00000-0 95600-4 0 9090
2 99999 51.6300 97.4474 0010473 36.1450 324.0420 15.76118558 317

Ted Molczan