|Rob Hawley's Pages
Observatory Main Page
|Hydrogen = RED
HON Palette Image
||One of the most famous
palette in use in astronomy is the Hubble Palette.
These are the color assignments in use for narrowband images
in the Hubble telescope.
The Ha and N emissions are very close and most narrowband filters combine them. My filters split Ha from NII. Depending on the Object I may replace Sulfer with NII. For example my image of the Veil (lower left).
In objects strongly dominated by Ha this results in a sickly green image, but sometimes this is what is required to see the structure.
SH 274 also gives an example of using the Hubble Palette using Sulfur instead of Nitrogen.
||This is the palette used by
the Canada France, Hawaii Telescope
The top photo is NGC 6888. The bottom is NGC 281. Both use Nitrogen.
In NGC 281 note how much more visible the O III enhanced center is when compared to the HNO image below.
SH274 was processed with the HOS palette. Constrast this image to the SHO image above.
||An alternative palette to
CFHT when the majority of the signal is Hydrogen and the
Nitrogen/Sulfur signal is also strong. Examples are
While this particular palette does not do justice to NGC 6888 itself see the impact on the surrounding gas clouds here