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