On April 13, we detected a large maneuver by Object 53357, the PRC’s experimental spaceplane.
This maneuver resulted in a decrease in altitude from 613 - 355 km.
Shown below: the previous orbit is in orange and the new one is in blue.
This new mission phase could indicate preparations for landing of the reusable spaceplane — or something new entirely.
Since the spaceplane launched in August 2022, we’ve observed multiple large maneuvers raising the object’s altitude — as well as repeated deployments, formation flying, and docking of a sub-satellite OBJECT J (NORAD ID 54218).
We’ll continue to monitor this on-orbit activity using our suite of space behavior awareness tools, including the maneuver detection dashboard. #LEO#space
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Two large, defunct objects in #LEO narrowly missed each other this morning — an SL-8 rocket body (16511) and Cosmos 2361 (25590) passed by one another at an altitude of 984km. 🚀⚠️ #SpaceDebris
1/ Based on our radar tracking data, we computed a miss distance of only 6 meters with an error margin of only a few tens of meters.
2/ It's important to note that this conjunction occurred in one of the "bad neighborhoods" we've talked about before: 950 - 1050 km. 🏚️
1/ We are monitoring a close approach event involving IRAS (13777), the decommissioned space telescope launched in 1983, and GGSE-4 (2828), an experimental US payload launched in 1967.
(IRAS image credit: NASA)
2/ On Jan 29 at 23:39:35 UTC, these two objects will pass close by one another at a relative velocity of 14.7 km/s (900km directly above Pittsburgh, PA). Our latest metrics on the event show a predicted miss distance of between 15-30 meters.
3/ These numbers are especially alarming considering the size of IRAS at 3.6m x 3.24m x 2.05m. The combined size of both objects increases the computed probability of a collision, which remains near 1 in 100.