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News Release Archive:

News Release 511 of 954

December 3, 2002 12:00 AM (EST)

News Release Number: STScI-2002-27

Hubble Makes Precise Measure of Extrasolar World's True Mass

Technical facts about this news release:

About the Object
Object Name: Gliese 876b; Gl 876b; GJ 876b; Ross 780b
Object Description: Extrasolarplanet; Companion to Star Gliese 876 (Ross 780)
Position (J2000): R.A. 22h 53m 16.73s
Dec. -14° 15' 49.3"
Constellation: Aquarius
Distance: 15.19 light-years (4.66 parsecs)
About the Data
Instrument: FGS
Exposure Date(s): June - August, November 1999; May 2000; November 2001
Exposure Time: 4 hours
Principal Astronomers: T. Forveille (CFHT/Observatoire de Grenoble), G. F. Benedict and B. McArthur (McDonald Observatory), X. Delfosse (Observatoire de Grenoble), E. Nelan (STScI), R. P. Butler (Carnegie Institute), W. Spiesman (McDonald Observatory), G. W. Marcy (UC Berkeley), B. Goldman (NMSU), C. Perrier (Observatorie de Grenoble), W. Jefferys (University of Texas), M. Mayor (Observatorie de Geneve)
About the Image
Release Date: December 3, 2002
Filters: F583W
Release Credit: NASA and G. F. Benedict (McDonald Observatory)