NGC 5907 is a spiral galaxy located approximately 50 million light years from Earth. It has an anomalously low metallicity and few detectable giant stars, being apparently composed almost entirely of dwarf stars. It is a member of the NGC 5866 Group. NGC 5907 has long been considered a prototypical example of a warped spiral in relative isolation. Then in 2006, an international team of astronomers announced the presence of an extended tidal stream surrounding the galaxy that challenges this picture and suggests the gravitational perturbations induced by the stream progenitor may be the cause for the warp. NGC 5907 is also known as the Knife Edge or Splinter galaxy. The galaxy was discovered in 1788 by William Herschel. Supernova 1940A was in this galaxy. [Source: Wikipedia]

The image was captured with the venerable Meade 12"LX200, using the Atik 383L+ mono at F7.16 (i.e. 2182mm FL). Astronomik's Luminance, Red, Green and Blue filters were used. All subs were taken at 1x1 bin, -10C, and 600 seconds each.

Image 2014 -- APT image capture software

Lum 600s: 24 subs (4.00 hr) on Jun 29th and 30th.

Image 2016 -- SGPro image capture software

Lum 600s: 9 subs (1.50 hr) on Jul 11th.

Red 600s: 12 subs (2.00 hr) on Jul 13th, 16th and 17th.

Green 600s: 14 subs (2.33 hr) on Jul 13th, 14th, 15th, 16th and 17th.

Blue 600s: 14 subs (2.33 hr) on Jul 14th and 17th.

Processing was done with PixInsight, following (for the most part) kayronjm's tutorial of Feb. 24th, 2013. Filter L was used to develop the Lum image. R, G and B were collected for the color mix. North is up, and this is a significant crop due to image misalignment between 2014 and 2016.

This was (I believe) the first time I combined images (lum) from two different years. As I recall, I was not satisfied with the RGB work from 2014 and set the whole project aside. I revisited NGC5907 this July and got the colors more to my liking.



Again, I suspect the summer's high humidity along with shooting over Burleson's city lights causes the problematic internal reflections that make for a noisy background.