The Archer and The Serpent - a photo on Flickriver

In this my latest image containing 2 of the most prominent objects in Sagittarius (the archer) and Serpens (the serpent).
From left The Omega Nebula M17, in the center The Eagle Nebula M16 and far right is the open cluster NGC 6604 and the bright emission nebula Sh2-54 in the constellation Serpens, processed as Hubble Palette (SHO).

Using data from Grand Mesa Observatory’s System 1a the William Optics Redcat together with a QHY16200A Monochrome CCD, this combination is giving a field of view of approximately 6 x 5 degrees. In this Hubble Palette version (SHO) the H-Alpha is mapped to green, SII is mapped to red and OIII is mapped to the blue channel. while the colors in this image are not the true colors, the narrowband filters used in the making of this Hubble Palette image reveal much more of the hidden gasses not visible in a broadband image, I used Starnet in Pixinsight to make the image Starless and then added the more natural star color by inserting stars from the RGB image. Captured over 8 nights in 2021 for a total acquisition time of 14.9 hours.

The William Optics Redcat with QHY16200A and its 7 position filter wheel with Chroma filters is now available at Grand Mesa Observatory for subscription, see here for details grandmesaobservatory.com/equipment
View in High Resolution:
Astrobin www.astrobin.com/ylbajk/
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Technical Details
Captured and processed by: Terry Hancock
Location: GrandMesaObservatory.com Purdy Mesa, Colorado
May 19th, June 1st, 3rd, 4th, 6th, 9th, 11th, 12th 2021
HA 150 min 15x600 sec
OIII 170 min 17x600 sec
SII 110 min 11x600 sec
LUM 125 min 25x300 sec
RED 115 min 23x300 sec
GREEN 115 min 23x300 sec
BLUE 110 min 22x300 sec
Filters by Chroma
Camera: QHY16200A
Gain 0, Offset 130 Calibrated with Flat, Dark and Bias Frames.
Optics: William Optics Redcat 51 APO @ F4.9
EQ Mount: Paramount MEII
Image Acquisition software Maxim DL6
Pre Processing in Pixinsight
Post Processed in Photoshop CC
Star Removal by Starnet in Pixinsight

The light we see from the Eagle Nebula and its associated stars left some 7,000 years ago, but some astronomers suspect the Pillars of Creation may have already been obliterated when a massive young star within the nebula detonated as a supernova. The Spitzer Space Telescope detected evidence of a patch of hot gas near the Pillars which may have been caused by such an event about 8,000 years ago. Information from our e-book cosmicpursuits.com/astronomy-courses-and-e-books/armchair...

Taken on: July 20, 2021

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