Mapped and TrueRGB color composition for 20 panels mosaic of winter nebulae in Aurigae (David Lindemann)

Mapped and TrueRGB color composition for 20 panels mosaic of winter nebulae in Aurigae

To compose this image I used Photoshop CS5 with three layers:

SHO as background layer

RGB as darken layer with 65% opacity

RGB stars only as screen layer with 100% opacity

Captured over 19 nights 11/11/2013, 11/25/2013, 11/26/2013, 11/27/2013, 11/30/2013, 12/01/2013, 12/02/2013, 12/03/2013, 12/04/2013, 12/05/2013, 12/07/2013, 12/08/2013, 12/09/2013, 12/10/2013, 12/11/2013, 12/12/2013, 12/13/2013, 12/15/2013, and 12/16/2013 with Takahashi FSQ106ED @f/5 530mm focal length with Apogee Alta U8300 monochrome and Astrodon H-a, SII, OIII 5nm narrowband filters and Astrodon TrueBalance RGB filters.

77 x 1200s H-a unbinned = 25h40m

59 x 1200s OIII unbinned = 19h40m

62 x 1200S SII unbinned = 20h40

65 x 300s Red binning 2x2 = 5h25

66 x 300s Green binning 2x2 = 5h30

66 x 300s Blue binning 2x2 = 5h30

Total exposure time used to build this image = 82h25m

Total cumulated capture time over 19 nights with all filters = 119h30m

Software: MaximDL to capture, calibrate, register, normalize, data reject and combine - Straton for stars removal - Photoshop CS5 and PixInsight for HDR processing and non-linear streching and color combine.

Original
Final
B

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	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

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	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

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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	Basic pending
Started	...
Astrometry.net job	9647644
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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