sh2-128 aka Abell 77 (lowenthalm)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: PK097+03.1 · Sh2-128 · TYC3970-364-1 · TYC3970-492-1

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sh2-128 aka Abell 77

Acquisition type: Lucky imaging

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sh2-128 aka Abell 77

Acquisition type: Lucky imaging

So this is the core of an HII region that was originally catalogued as a planetary nebula, thus its listing in the Abell planetary catalog as Abell 77. There are a few images of the wider field available on-line that show a larger faint nebulosity that would fill this field, but few that show much detail in this core structure. I only used an IR/UV Cut filter, so was not able to pick this fainter outer nebula from the suburbs. Next time I image this, I'll use a light pollution filter.

The nebula reminds me a bit of the crescent nebula. This makes me wonder whether it is a more distant analog of the more famous nebula and if the bright star at the center might thus be a Wolf-Rayet star.

One very noticeable thing about this field is the large number of yellow stars. I suspect this is caused by significant interstellar dust reddening most of the stars in this field.

Each of the 5 images stacked here were live-stacked images of 240 two second subs.

Suburban Astrophotography
Astrophotography with Dobson

All
Nebula

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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.
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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	3657026
PixInsight job	0D8WKZXNX5SFNF9037BU7PZNA4KFQN3F
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h32m11s.510
RA (top/left)	21h31m36s.238
RA (top/right)	21h31m23s.533
RA (bottom/right)	21h32m45s.600
RA (bottom/left)	21h32m58s.877

Dec (center)	+55°52′50″.79
Dec (top/left)	+56°01′32″.31
Dec (top/right)	+55°45′27″.10
Dec (bottom/right)	+55°44′08″.54
Dec (bottom/left)	+56°00′13″.42

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sh2-128 aka Abell 77

sh2-128 aka Abell 77

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sh2-128 aka Abell 77

sh2-128 aka Abell 77

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