.
Guest posted by: GruntOfMonteCristo
Fourteen ton spacecraft still has 11 tons of toxic rocket fuel on board…(rollover below)
After a long delay in the posting of the late-Saturday NORAD tracking fit for Phobos-Grunt, internet watchers were beginning to worry that the spacecraft had already broken up in the atmosphere about a day before most predictions. That vigil ended last night, at around 10:40pm Treehouse time. One thing that can be concluded from this update, other than the vehicle being intact, is that the orbit decay trends are continuing fairly smoothly. You probably won’t hear this elsewhere, but that may indicate that the Russian space agency ROSCOSMOS has not been completely straight about the tank material housing the toxic propellants. If it were aluminum as stated, the tanks likely would have ruptured after more than a day of being engulfed by plasma, especially since the vehicle seems to be flying in a tanks-first attitude. The propellants would have been scattered by now, dramatically decreasing the mass of the vehicle, and causing a spike in the decay rate. This apparently hasn’t happened. The vehicle seems to have held together so far, and that’s a bad sign. In my opinion, it supports the suspicion that the tanks are really titanium, which will probably survive the reentry all the way to the ground. (more…)






