NGC 2818

10,400 light-years (3.2 kiloparsecs)

This image is roughly 2 arcminutes (6.5 light-years or 2 parsecs) wide.

This image was created from HST data from proposals 11956: K. Noll, Z. Levay, M. Mutchler, L. Frattare, C. Christian, F. Hamilton, and H. Bond (STScI/AURA)

F502N ([O III]), F656N (H-alpha), and F658N ([N II])

Illustration:: NASA, ESA, and Z. Levay (STScI);
Science:: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)

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

Blue: F502N ([O III])
Green: F656N (H-alpha)
Red: F658N ([N II])