Since there is a discussion about radioactive debris, I hope you won't mind if I asked if anyone could tell me if 70-071C (Cosmos 361 debris) could have contained radioactive material? I have observed a very strange event on 5-Oct-70 around 8hUT that have puzzled me for years. I suspect I could have assist to the reentry of a part of the Cosmos 361 satellite. The phenomena looked like an extremely bright circular aurora that spreaded into triangle. The circular phase lasted a few minutes and the triangular phase for at least 30 minutes. Any info about this object would be greatly appreciated. Thank you. Clement Drolet 76266.2530@compuserve.com