The Squid Nebula (OU4) and the Flying Bat (SH2-129) (StarChaser1955)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD201047 · HD201063 · HD201344 · HD201429 · HD202214 · HD202380 · HD203025 · HD203265 · HD203338 · HD203339 · HD239582 · HD239605 · HD239618 · HD239626 · LBN 445 · LBN 446 · LBN 449 · LBN 453 · Sh2-129

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The Squid Nebula (OU4) and the Flying Bat (SH2-129)

Powered byPixInsight

The Squid Nebula (OU4) and the Flying Bat (SH2-129)

The Squid Nebula (OU4) inside the Flying Bat (SH2-129).

Acquisition Details

Best 156 lights out of 392 taken (13 hours out of over 32)
Each light being 300 seconds through an IDAS NBZ dual-band filter (Ha and OIII band shifted for optimum results with fast scopes).
Stacked in DSS with 30 flats. No bias or dark calibration frames.
Images taken with a Canon Ra (ISO: 1600) through a f/2.2 Celestron RASA 11" V2 on a Meade LX850 mount/drive auto-guided by Meade StarLock at Sky Pony Observatory in the Davis Mountains of west Texas (Bortle 2 skies).
Image Dates: 2021-10-04 through 2021-10-25
Canon Ra Sensor temperature: 14C to 38C (57F to 100F)
Target altitude: 60 to 34 degrees
FWHM: 3.50 to 4.10

PixInsight Process Flow

DynamicCrop to 5900x3933 (2:3)
DBE - Division (33 samples)
DBE - Subtraction (37 samples)
BlurXTerminator (default PSF)
NoiseXTerminator (v1.1.2 AI v2)
StarXTerminator (into “starless” and “stars”)
GeneralizedHyperbolicStretch (five iterations) on “starless”
Used the GAME script to create a Squid mask.
GeneralizedHyperbolicStretch (one iteration) on the Squid mask.
SCNR (Green) on “starless”
HistogramTransformation on “stars” to desired brightness
CurvesTransformation (moderate strength) on “stars”
PixelMath (~starless*~stars)

Please note: The following tables are updated every 24 hours.

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 success
Started	...
Astrometry.net job	8063686
PixInsight job	WHFHF3CFJHI3Z0GSF4UR2C93H5TXF4DG
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h11m40s.89
RA (top/left)	21h03m13s.88
RA (top/right)	21h04m28s.36
RA (bottom/right)	21h19m25s.59
RA (bottom/left)	21h19m34s.34

Dec (center)	+59°57′27″.3
Dec (top/left)	+61°23′04″.9
Dec (top/right)	+58°27′16″.10
Dec (bottom/right)	+58°29′58″.0
Dec (bottom/left)	+61°26′00″.2

Image Index:

Contribution Index (beta):

The Squid Nebula (OU4) and the Flying Bat (SH2-129)

The Squid Nebula (OU4) and the Flying Bat (SH2-129)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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Image Index:

Contribution Index (beta):

The Squid Nebula (OU4) and the Flying Bat (SH2-129)

The Squid Nebula (OU4) and the Flying Bat (SH2-129)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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