Here is a bit more information on this rarely discussed yet very cool moon:

Styx is Pluto’s smallest and faintest moon, and was first discovered by the Hubble Space Telescope in 2012 when New Horizons was already en route to Pluto. The image we see may not look like much more than a fuzzy blob, but scientists can discern a great deal about Styx by studying the image. For instance, we now know the moon’s approximate dimensions.

“Although it may not look like much, the new composite image of Styx reveals a highly elongated satellite, roughly 4.5 miles [7 kilometers] across in its longest dimension and 3 miles [5 kilometers] in its shortest dimension,” New Horizons project scientist Hal Weaver, of the Johns Hopkins University Applied Physics Laboratory, said in a statement.

As more information comes in about Styx, it’s orbit and surface will likely tell us a lot about our early solar system.

thanks to iflscience.com for the great info

thanks to NASA for the pic