Cassini image of Saturn's moon Prometheus on January 27, 2010

Here’s a raw, unprocessed, monochrome image of Prometheus, a small moon of Saturn, taken by Cassini last Wednesday; I’ve edited out some of the cosmic ray hits on the sensor. It’s today’s Astronomy Picture of the Day; the Planetary Society’s Emily Lakdawalla has been playing with some Prometheus imagery. Image credit: NASA/JPL/Space Science Institute.