RE: Babylon 1 minor orbit change?
Matson, Robert (ROBERT.D.MATSON@cpmx.saic.com)
Thu, 17 Jun 1999 14:53:45 -0700
Hi Philip and List,
> >Early predictions showed the closest approach of the debris to the ISS
> would
> >be within 1 kilometer, but the actual distance at the time of its closest
> >approach on Sunday morning was 7 kilometers.
> >
> >Flight controllers planned to maneuver the station Saturday night, but
> the
> >uplinked procedure for maneuvering had one of the Zarya module's engines
> >firing longer than is permitted by the module's onboard computer program.
> >Therefore, Zarya's motion control system correctly canceled the burn
> >automatically and the maneuver was not performed.
>
Cosmos 100 R/B (#1844) was the culprit. The orbits were predicted to come
within 0.5 km of each other, with the closest approach between ISS and
C100r in those orbits at about 5 km on Sunday, June 13th at 13:31:08 UTC
using:
ISS 20.0 4.0 0.0 1.0 d
1 25544U 98067A 99167.68952555 .00013892 00000-0 18156-3 0 7026
2 25544 51.5933 200.3662 0011139 353.4457 6.6373 15.58886879 32525
Cosmos 100 R/B 3.8 2.6 0.0 5.1 v
1 01844U 65106B 99165.18169485 +.00044156 +00000-0 +48026-3 0 00542
2 01844 064.9648 150.7715 0018472 280.6070 079.3000 15.62990609834435
COLA output:
Date UTC Time Norad Name Range/OrbSep NdAng EphAge
6/13/1999 13:31:07.86 1844 Cosmos 100 R/B 4.9/ 0.5 84.0 -0.62
--Rob