According to the description made by StreetCap1, the object is not usual for Mars photos as it doesn’t seem to be a dirt, dust or scratch on the lens. The YouTube account added that it looks like NASA has changed its policy towards UFOs and other anomalies as the U.S. independent agency released such photos.
However, John Bridges said he was not convinced. Bridges, who is working with NASA to analyse Curiosity data, said that he has not seen the original image but suspected that it might be one of the moons of Mars.
The object could also be a planet, comet, or man-made satellites. NASA has Mars Reconnaissance Orbiter positioned above the Curiosity to take pictures of the rover from an altitude of over 300 kilometres.
Josh Barker of National Space Centre said that the photos show an object that appears to be flying and it is still unidentified.