Sharpless 112 (Aaron Freimark)

Sharpless 112

Link to TIFF/FITS: https://www.dropbox.com/s/es9bydmg9w5rllx/Sh2-112-SHO_L_ct_cs_stars_big_depth.tif?raw=1

Although JWST sets a new upper bound for equipment envy, I refuse to surrender.

Preprocessing
1. WeightedBatchProcessing
2. Create preview around nebula
3. DrizzleIntegration with Region of Interest to crop to preview
4. Dynamic Background Extraction on every filter except Ha
5. NoiseXTerminator

RGB
1. LinearFit R & G to B
2. ChannelCombination
3. ImageSolver script
4. Photometric Color Calibration
4. Histogram Transformation to stretch lightly

Narrowband
1. EZ Decon to create PSF files for Ha, OIII, SII (but do not execute the script yet)
2. PixelMath “K=0” to generate an all-black copy of any of the images
3. StarXTerminator to remove stars from the linear images
4. EZ Decon, using the all-black image as the “star mask”, plus the previously-created PSF file
5. NoiseXTerminator on each
6. Arcsinhstretch on each, to taste
7. CloneStamp on OIII to remove moonlight streaks (damn full moon)
8. CloneStamp on SII to clean
9. PixelMath to combine as SHO
10. SCNR to remove heavy green cast (thanks Ha!)
11. use LRGB Combination to re-apply Ha to RGB (checking only L component)
12. CurvesTransformation
13. CloneStamp again to clean some of the messy turds left from star removal

Combination
1. Make two copies of the starless image
2. on one, add stars with PixelMath: 1-((1-stars)*(1-$T))
3. Brighten RGB stars with Histogram Transformation, and apply these stars to the 2nd starless image. This results in two images with stars, but one has bigger stars than the other.
4. Export both combo images as 16-bit TIFF
5. Open both in Photoshop
6. Layer the image with bigger stars below the image with smaller stars
7. Using the erase brush, “punch out” several stars around the image, so the larger stars shine through
8. Maybe do a little final color balance in Photoshop
9. Flatten, and save as TIFF

Northeast Imagers
Mid-Hudson Astronomical Association (MHAA)

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	6000752
PixInsight job	OV8XQYCZ4ZXD9R66TV7KITMHBB1AJBGN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h34m17s.805
RA (top/left)	20h32m49s.619
RA (top/right)	20h37m00s.816
RA (bottom/right)	20h35m47s.306
RA (bottom/left)	20h31m33s.831

Dec (center)	+45°38′59″.35
Dec (top/left)	+45°13′20″.26
Dec (top/right)	+45°29′55″.60
Dec (bottom/right)	+46°04′31″.69
Dec (bottom/left)	+45°47′47″.85

Image Index:

Contribution Index (beta):

Sharpless 112

Sharpless 112

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Image Index:

Contribution Index (beta):

Sharpless 112

Sharpless 112

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information