Pluto may not be a planet, but it has three moons

I learned something I didn’t know from last month’s astronomical discussion of Pluto, which is that last year two more Plutonian satellites were discovered.  They are very small compared to Pluto’s first-known satellite, Charon, and might be only about 50 miles across.  How hard are they to see?  Their apparent diameter as seen from earth is about the same as that of an aspirin tablet seen from a spy satellite.  Here’s an animation of how Charon and the two newbies orbit Pluto.