News Release Archive:

News Release 450 of 1051

August 29, 2006 09:00 AM (EDT)

News Release Number: STScI-2006-30

Cassiopeia A - The Colorful Aftermath of a Violent Stellar Death

Technical facts about this news release:

About the Object
Object Name: Cassiopeia A
Object Description: Supernova Remnant
Position (J2000): R.A. 23h 23m 24s
Dec. +58° 48' 54"
Constellation: Cassiopeia
Distance: About 10,000 light-years 3,100 parsecs away.
Dimensions: This image is 8.5 arcminutes (25 light-years or 7.7 parsecs) wide. The bright remnant shell has a diameter of about 4 parsecs (13 light-years).
About the Data
Data Description: This image was created from HST data from the following proposals: 9890 and 10286, both by: R. Fesen (Dartmouth College), J. Morse (NASA Goddard Space Flight Center), J. Raymond (Harvard-Smithsonian Center for Astrophysics), R. Chevalier (University of Virginia), and M. Dopita (Australian National University).
Instrument: ACS/WFC
Exposure Date(s): March, 2004 and December, 2004
Exposure Time: 2.3 days
Filters: F625W (SDSS r), F775W (SDSS i) , and F850LP (SDSS z)
About the Image
Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration
Release Date: August 29, 2006
Colors This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope using several different filters. Three filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:
F625W blue
F775W green
F850LP red
Orientation/Scale: Supernova Remnant Cassiopeia A - December 2004