Artist's Concept of Kuiper Belt Object 2003 UB313 (Annotated)

This is an artist's concept of Kuiper Belt object 2003 UB313 (nicknamed Xena) and its satellite Gabrielle. NASA/ESA Hubble Space Telescope observed Xena with the Advanced Camera for Surveys on Dec. 9 and 10, 2005. The Hubble measurements of Xena yielded a diameter of 1,490 miles with an uncertainty of 60 miles (about 2400 kilometres with an uncertainty of 100 kilometres). Pluto's diameter is only 1,422 miles (or 2,288 kilometres).


NASA, ESA, and A. Schaller (for STScI)

About the Image

NASA press release
NASA caption
Release date:11 April 2006, 19:00
Size:3000 x 2250 px

About the Object

Name:2003 UB313, Dysnomia, Eris
Type:Solar System : Planet : Satellite
Solar System : Interplanetary Body : Dwarf planet
Category:Solar System

Image Formats

Large JPEG
748.5 KB
Screensize JPEG
144.9 KB


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