of the condensing CO2 south polar cap of Mars, Icarus, 2008, 197 (2): 386–402, doi:10.1016/j.icarus.2008.05.019 Byrne, Shane, The Polar Deposits of Mars
Detection of methane in the Martian atmosphere: evidence for life?. Icarus. 2004, 172 (2): 537–547. Bibcode:2004Icar..172..537K. doi:10.1016/j.icarus.2004
9 atlas of the moons of Mars," Icarus 23, 206-289 (1974). Calculating the angular size of an object with a diameter of 9km at a distance of 9250km, yields