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The Asteroid Framing Camera, AFC, will play a pivotal role in Hera’s mission. As well as acquiring detailed views of the surface of Dimorphos for scientific analysis, including the crater left by the DART impact, the AFC will also be used for guidance, navigation and control.
The AFC will home in on Dimorphos when it is still a single point of light in the sky – seen in conjunction with the larger asteroid Didymos. The AFC will then transition to close-up navigation, utilising edge detection to keep the asteroid centered in its field of view while tracking surface features to derive Hera’s exact position from the asteroid in a similar manner to self-driving car software.
Around the same size and shape as a household vase, the 1.3 kg AFC has been designed, manufactured and tested by Jena-Optronik in Germany.