Abell 35 Sharpless 2-313 in SHO (Ian Parr)

Celestial hemisphere: Southern · Constellation: Hydra (Hya)

Abell 35 Sharpless 2-313 in SHO, Ian Parr

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Abell 35 Sharpless 2-313 in SHO

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Abell 35 Sharpless 2-313 in SHO

Abell 35 (Sharpless, Sh2-313) was considered to be an old planetary nebula (PN) approximately 16 x 11’ in apparent size with low surface brightness in the constellation of Hydra about 1,200 light years distant. At 5.2 Light Years across it would be one of the largest Planetary Nebulas if that was realy the nature of the beast. However, later research around the brighness of it 'Central' stars and shock waves within the Nebula, such as around the blue 'Eye', while it plunges through the interstellar medium, have discounted it being a PN. With very low Surface Brightness of 26.2 and at 12 arcminutes across it was pretty faint on the raw subs but 7 hours of usable 5 minute images certainly helps. Maybe next time I will see if I can get a brace of 10 minutes subs.

Originally imaged in May 2023 but I got some good data last night as the moon dictated a move to narrow band and it was well placed for a good run. With the extra data and all the new improved Pixinsight tools, I just let Spectro Photometric Color calibration to it's job and the new version's pallette was more faithful to the data and need less messing around. Interestingly Pixinsights' Gradient Correction tool worked much better than GraxPert in this case. GraxPert can (sometimes) make a meal out of NB data. I always start with Gradient correction on the seperate combined channel data, then apply BlurXTerminator correction only, before creating the SHO combined image and let SPCC do it's magic.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.

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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	Basic success
Started	...
Astrometry.net job	9693047
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Abell 35 Sharpless 2-313 in SHO

Abell 35 Sharpless 2-313 in SHO

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Image Index:

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Abell 35 Sharpless 2-313 in SHO

Abell 35 Sharpless 2-313 in SHO

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