NGC 6503

18 million light-years (5.5 megaparsecs)

The optical/UV image of NGC 6503 was created from Hubble data from proposals 13364, PI: D. Calzetti (University of Massachusetts, Amherst), et al. and 9293, PI: H. Ford (JHU) et al.

F658N (H-alpha+[N II]), F275W (UV), F336W (U), F438W (B), F555W (V), and F814W (I)

NASA, ESA, and Z. Levay (STScI);
Acknowledgment: D. Calzetti (University of Massachusetts, Amherst), H. Ford (JHU), and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration

This image is a composite of separate exposures acquired by the ACS/WFC and WFC3/UVIS instruments. Several filters were used to sample various wavelengths. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:

Pink: F275W (UV)
Purple: F336W (U)
Blue: F438W (B)
Green: F555W (V)
Red: F814W (I)
Red: F658N (H-alpha+[N II])