News Release Archive:

News Release 133 of 325

May 28, 2007 03:30 PM (EDT)

News Release Number: STScI-2007-19

Hubble Photographs Grand Design Spiral Galaxy M81

Technical facts about this news release:

About the Object
Object Name: M81, NGC 3031, Bode's Galaxy
Object Description: Spiral Galaxy
Position (J2000): R.A. 09h 55m 33s
Dec. +69° 03' 55"
Constellation: Ursa Major
Distance: Approximately 11.6 million light-years (3.6 megaparsecs)
Dimensions: This image is roughy 19 arcminutes (64,000 light-years or roughly 20 kiloparsecs) wide.
About the Data
Data Description: The ACS data was from the HST proposal 10584: A. Zezas, G. Fabbiano, A. Prestwich, and M. Garcia (Harvard-Smithsonian Center for Astrophysics), J. Gallagher (University of Wisconsin, Madison), J. Miller (University of Michigan), P. Kaaret (University of Iowa), V. Kalogera (Northwestern University), M. Ward (University of Durham), and A. King (University of Leicester); and proposal 10250: J. Huchra, P. Barmby, and B. Mcleod (Harvard-Smithsonian Center for Astrophysics) and J. Brodie and J. Strader (University of California, Santa Cruz).
Instrument: ACS/WFC
Exposure Date(s): Various dates from 2004 - 2006
Filters: F435W (B), F606 (V), and F814W (I)
About the Image
Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
Release Date: May 28, 2007

This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope. Three filters were used to sample light from broad wavelengths. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:

F435W (B) blue
F606W (V) green
F814W (I) red


Orientation: Hubble Photographs Grand Design Spiral Galaxy M81