Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016 (David Dearden)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016, David Dearden

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Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016

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Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016

Finally got OSC RGB data to go with Hα from last year. This is the result.

Date: 25 Sep 2015 (Hα) + 8 Oct 2016 (RGB)

Subject: Sh2-155, Cave Nebula

Scope: AT8IN + Antares 0.5x focal reducer

Filter: Baader Planetarium UHC-S

Mount: EQ-6 (EQMOD)+PEC

Guiding: Orion ST80+Antares 0.5x focal reducer +DSI Ic+PHD 2.6.1.8 (Win 10 ASCOM)

Camera: DSI IIc, no chiller CCD ~10 °C

Acquisition: Sequence Generator Pro 2.5.1.15 with Nebulosity 4.1.1 ASCOM camera driver (Win 10)

Exposure: 38x600 s (Hα) + 33x300 s (RGB)

Stacking: Neb 4, bad pixel map, bias included, 33 flats, match histograms, trans+rot align, Deep Sky Stacker 2x drizzle stack.

Processing: StarTools 1.4.316: Crop; Wipe; Develop: 81.07%; HDR

ptimize; Color:Scientific, 165% saturation; Deconvolute: 4.1 pix; Life:moderate; Track: Smoothness 87%, 4.5 pix; Magic, shrink 2 pix. Heal out stars per online StarTools tutorial and save. Photoshop CS6 + Astronomy Tools: Deep space noise reduction; Use HαR for R and for Luminance; boost R channel; Layer on RGB stars using Color Dodge; Increase star color; Curves; Channel mixer boost R; Astroframe.

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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	Advanced failed
Started	...
Astrometry.net job	1288872
PixInsight job	S6JHN3M00K95QXI9U3L7LG4XZJIOMEU6
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

Image Index:

Contribution Index (beta):

Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016

Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016

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Image Index:

Contribution Index (beta):

Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016

Sh2-132, HαRRGB, 25 Sep 2015 + 8 Oct 2016

Equipment

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Description

Comments

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