October 2011: Tulip Nebula

A battle against the full Moon, … and a win thanks to the H-alpha filter!

This is another try to image a deep sky object under a full Moon light. The narrowband component (almost an hour exposition), with an H-alpha filter, was gradient free and of great detail and beauty. Unfortunately, the RGB components (1500 second each) were seriosly damaged with the Moon gradient. 

To somehow overcome this, a “synthetic” R component was created with the H-alpha and the original R image. This synthetic R was also used as a Luminance component, with a 50% weight. The R, G and B were processed with agressive background neutralization tools in PixInsight, to remove as much gradient as possible.

Go to this object description and this image technical detail.