NGC 1491 in "modified" Hubble palette

Posted by CraigAndTammy
on Monday, January 21, 2013

NGC 1491 is an emission nebula located around 10,700 light-years away in the constellation Perseus. Newly born stars emitting ultraviolet light make elements in this nebula glow. At the center of the nebula is an 11th magnitude star whose stellar wind is blowing a bubble in the gas surrounding it. Other designations for this nebula are Sharpless 206 (Sh2-206), Cederblad 25, & LBN 704.

This image was processed in the "modified" Hubble Palette as outlined by Bob Franke, where SII = Red, H-alpha = Green, OIII = Blue with the selective color tool in Photoshop being used to shift the colors to the popular and well-liked turquoise and gold motif.

This image is a collaboration with Bill Snyder. He captured all the data and we processed it. A big thanks to Bill for sharing his data and allowing us to process it and share our results with everyone.


Telescope: PlaneWave Instruments 17" CDK Astrograph
Mount: Software Bisque Paramount ME
Camera: Apogee Alta U16M
Filters: Astrodon 5nm Ha, 3nm OIII, 5nm SII
Exposure: 21 x 20min. Ha; 12 x 20min. OIII; 12 x 20min. SII
Post-processing: ImagesPlus 5.0; Adobe Photoshop CS5; Gradient XTerminator; Noel Carboni's Actions

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