NASA, Astronomy Picture Of The Day, part I

http://apod.nasa.gov/apod/ap081107.html



Butterfly Nebula image was selected as an "Editors' Choice" by Sky&Telescope magazine.



In this image colors are showing difference between Double ionized Sulfur (Red), Hydrogen alpha (Green) and triple ionized Oxygen (Blue).

This palette is generally known as a Hubble palette by the palette used to processing images from Space telescope Hubble.



Imaging data:

- Camera, QHY8

- Filters, Baader 7nm H-alpha and Baader 8,5nm O-III

- Optics, Tokina AT-X 300mm @ f2.8

- Exposures, 5 X 1200s H-alpha 3 X 1200s O-III

4 X 1200s S-II + flats and bias

- Guiding, LX200 GPS 12" + PHD-guid