Moon Around the Dwarf Planet 2007 OR10

These two images, taken a year apart, reveal a moon orbiting the dwarf planet 2007 OR10. Each image, taken by the NASA/ESA Hubble Space Telescope's Wide Field Camera 3, shows the companion in a different orbital position around its parent body.

2007 OR10 is the third-largest known dwarf planet, behind Pluto and Eris, and the largest unnamed world in the Solar System. The pair is located in the Kuiper Belt, a realm of icy debris left over from the formation of the Solar System.

The dwarf planet is about 1520 kilometres across; the moon is estimated to be 240 kilometres to 400 kilometres in diameter. 2007 OR10, like Pluto, follows an eccentric orbit, but it is currently three times farther than Pluto is from the Sun.

Links:

Credit:

NASA, ESA, C. Kiss (Konkoly Observatory), and J. Stansberry (STScI)

About the Image

NASA press release
NASA caption
Id:opo1718a
Type:Collage
Release date:19 May 2017, 12:20
Size:1440 x 720 px

About the Object

Name:2007 OR10
Type:Solar System : Interplanetary Body : Dwarf planet
Category:Solar System

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BandWavelengthTelescope
Optical
V
606 nm Hubble Space Telescope
WFC3

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