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News Release Archive:

News Release 372 of 951

April 11, 2006 01:00 PM (EDT)

News Release Number: STScI-2006-16

Hubble Finds 'Tenth Planet' is Slightly Larger than Pluto

Technical facts about this news release:

About the Object
Object Description: 2003 UB313, "Xena"
Position (J2000)
on December 9/10, 2005:
R.A. 01h 35m 37s.64
Dec. -05° 39' 57 ".7
Distance: 10 billion miles away (16 billion kilometers)
About the Data
Data Description: This image was created from HST data from proposal 10759: M. Brown (Caltech), D. Rabinowitz (Yale University) and C. Trujillo (Gemini Observatory).
Instrument: ACS/HRC
Exposure Date(s): December 9/10, 2005
Exposure Time: 1.9 hours
Filters: F435W(B)
About the Image
Image Credit: NASA, ESA, and M. Brown (Caltech)
Release Date: April 11, 2006