Hubble/GALEX/Spitzer Composite Image of M81

Format
Size

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

                                     Color: 	

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

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