The spacecraft's pressurised instrument compartment began to leak as soon as the spacecraft entered orbit around Mars, which controllers believed to be the result of a micrometeoroid impact during orbital insertion. It ceased operations on 28 February, having returned 180 photographic frames, 43 of which were of usable quality. The probe's original planned lifetime in mars orbit has been 3 months. The probe's gamma ray spectrometer measured the uranium, thorium and potassium content of the surface the probe passed over and found they were similar to Igneous rocks on earth. The exact ratios of the elements varied with the age of the surface. Mars 5's Infrared radiometer reported a daytime surface temperature of between -44°C and -2°C. Night time temperatures were measured at -73°C.