Any success? I have found COSPAR international designation origins -  IGY Bulletin: No. 61, No. 62, No. 63. Trans AGU 43:345. https://doi.org/10.1029/TR043i003p00345 (In case the number of components or objects of a satellite launching is large, the following convention will be used: the letters I and 0 will always be skipped; the 25th object or component will be designated AA, the 26th AB, etc., the 49th BA, etc., etc)
  The question is how the ILRS Cospar id is calculated. For Tubin(2021-059X, 2105922) and Elsa-D(2021-022N, 2102213) seems that its just a conversation  according to the rule above, but there are a few examples  in the past (Lightsail 2 and GFZ-1) which doesn't follow this convention.


2015-025L     | 1502511  |40661|   Lightsail 1   
2019-036AC   | 1903629  |44420|   Lightsail 2   
1986-017JE   | 8601795  |23558|  GFZ-1

In our experience FOV is  sufficient  to have  a time to manually use safety switch to block outgoing laser beam. From the other hand - plane entering FOV of camera is a quite rare event for our system and location.

Any ideas or suggestions for ICCD/EMCCD/CCTV camera for tasks like  visual tracking and star models? In a few SLR publications ICCD cameras are mentioned, like  https://cddis.nasa.gov/lw14/docs/presnts/atm1_zzp.pdf, but no details on specific models. The options are like starting from CCTV cameras used also  in astronomy like Watec http://wateccameras.com/productline/cameras/910HXEIA and ending like Andora Zyla 4.2 PLUS sCMOS(?).
Requirements besides the obvious to see as much as possible:
1) Programming API, e.g. we should be able to define and display reference marks
2) Gating - we should able to shut down  camera/close shutter at certain moments
3) Pixel size, sensor size and mount are important but here we have some freedom, px count is not so important. C-mount and 1/2" CCTV like sensor size should do fine.
4) Expected lifetime - should handle regular use in tracking
Applications:
Visual tracking, mount models, and optionally experiments like described in "Optical Characteristics of the Retroreflector in Space on the ADEOS Satellite in Orbit", where ICCD was used.