News Release Archive:

News Release 41 of 271

August 10, 2010 09:00 AM (EDT)

News Release Number: STScI-2010-24

An "Island Universe" in the Coma Cluster

Technical facts about this news release:

About the Object

Object Name:	NGC 4911
Object Description:	Spiral Galaxy
Position (J2000):	R.A. 13h 00m 56s.06 Dec. +27° 47' 27".13
Constellation:	Coma Berenices
Distance:	320 million light-years (100 million parsecs)
Dimensions:	The image is roughly 2.5 arcminutes (230,000 light-years or 72,000 parsecs) wide.

About the Data

Data Description:	The image was created from Hubble data from proposals 10842: K. Cook (Lawrence Livermore National Laboratory), M. Gregg (University of California, Davis), L. Macri (National Optical Astronomy Observatories, AURA), J. Mould (University of Melbourne), P. Stetson (Dominion Astrophysical Observatory), and D. Welch (McMaster University); and 11956: K. Noll, Z. Levay, L. Frattare, C. Christian, F. Hamilton, and H. Bond (Hubble Heritage Team/STScI).
Instrument:	ACS/WFC and WFPC2
Exposure Date(s):	December 2006 – January 2007 and January 2009 – February 2009
Exposure Time:	28 hours
Filters:	F450W (B), F606W (V), F673N (redshifted H-alpha), and F814W (I)

About the Image

Image Credit:

NASA, ESA, and the Hubble Heritage Team (STScI/AURA)

Release Date:

August 10, 2010

Color:

The image is a composite of separate exposures made by the ACS and WFPC2 instruments on the Hubble Space Telescope. Four filters were used to sample broad and narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:

F450W (B)	blue
F606W (V)	green
F673N (redshifted H-alpha)	red
F814W (I)	red

Orientation: