News Release Archive:

News Release 577 of 1051

September 25, 2003 11:00 AM (EDT)

News Release Number: STScI-2003-29

Hubble Uncovers Smallest Moons Yet Seen Around Uranus

Technical facts about this news release:

About the Object
Object Name: Uranus S/2003 U 1 and S/2003 U 2
Object Description: Planet Satellites (moons) of Uranus
Distance: The semi-major axis of Uranus's orbit about the sun is 19.18 Astronomical Units (A.U.) or roughly 2.9 billion km. S/2003 U 1 is 60,600 miles (97,700 km) away from Uranus. S/2003 U 2 is 46,400 miles (74,800 km) away from Uranus.
Dimensions: The planet (without rings) has a diameter of roughly 32,000 miles (51,000 km) at the equator. S/2003 U 1 is 10 miles (16 km) wide. S/2003 U 2 is 8 miles (12 km) wide.
About the Data
Data Description: This image was created from HST data from proposal 9823: M. Showalter (Stanford University/NASA Ames) and J. Lissauer (NASA Ames).
Instrument: ACS/HRC
Exposure Date(s): August 25, 2003
Filters: F330W(U), F475W(g), F606W(V), F814W(I), CLEAR
About the Image
Image Credit: NASA and M. Showalter (Stanford University/NASA Ames)
Release Date: September 25, 2003
Orientation: Hubble Spies Tiny Moons Circling Uranus