Two new moons of Pluto were found with Hubble. Knowing those moons' orbits will enable better determination of the masses of Pluto and Charon, the bigger moon discovered in the late 1970s.
One is about 50,000 km from Pluto and is 100-140km across. The other is about 65,000 km away and 110-160km across. What size they are would depend on how reflective they are. For comparison, Charon is about half of Pluto's diameter with Charon being 1205 km across and Pluto being 2390 km. Charon is about 19000 km from Pluto.
Discovers' web page
Hubble site
space.com
Washington Post
One is about 50,000 km from Pluto and is 100-140km across. The other is about 65,000 km away and 110-160km across. What size they are would depend on how reflective they are. For comparison, Charon is about half of Pluto's diameter with Charon being 1205 km across and Pluto being 2390 km. Charon is about 19000 km from Pluto.
Discovers' web page
Hubble site
space.com
Washington Post
