OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula) (snakagawa)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula), snakagawa

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OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula)

Powered byPixInsight

OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula)

C8 Faster+Hyperstar 3 at 425mm and F/2.66 (effective F/3).Atik460ex (mono) at -10 deg C.

I used an aperture mask as used by Mike Hawtin and "Ikonnikov" at the Astrobin. The mask really reduces the star size for a minimal loss of lights (particularly for narrowband but I have not tested quantitatively). Also, the Hyperstar adapter provided by Starizona was too long (~1.5mm) and filing it down to the correct length improved the star size by 5-10%. The images were taken over 4 nights between torrential rain, hail storm, murky sky, and equipment failure (my mount's control board [Losmandy G11] failed) to top off.

Oiii 10min x 67, 1min x 30

Ha 10min x 28, 1min x 20

Sii 10min x 14, 1min x 30

All with Astrodon 5nm filter.

The color palette is a mix (50:50) of natural color and HST. Processed by ImagesPlus, Photoshop, and Registar.

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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
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Extremely wide field
Star trails
Northern lights
Noctilucent clouds
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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 success
Started	...
Astrometry.net job	670497
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula)

OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula)

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Image Index:

Contribution Index (beta):

OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula)

OU4 (Giant Squid Nebula) and a part of Sh2-129 (Flying Bat Nebula)

Equipment

Acquisition details

Description

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