NGC7822 in HOO (Brian Hayward)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 580 · LBN 581 · LBN 582 · LBN 583 · LBN 584 · LBN 586 · LBN 588 · LBN 589 · LDN 1264 · LDN 1266 · LDN 1267 · LDN 1268 · LDN 1269 · LDN 1270 · LDN 1271 · LDN 1273 · LDN 1275 · NGC 7822 · Sh2-171

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NGC7822 in HOO

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NGC7822 in HOO

Now that the clouds have rolled back in, I figured it was time to process my recent data of NGC7822.

After an initial look at the results with auto-stretch, I thought it looked a bit boring so figured I would try to create a Hubble palette HOO instead.

I wasn't sure about the framing as the individual frames came off the camera, but in the end I think it turned out nice with the faint nebulosity around it and especially the arrow-like structure in the lower left corner of the image. I think HOO really helped to highlight some of the smaller structures in the core of the nebula itself.

Stars were processed separately (not HOO) and re-combined at the end.

Equipment:
EQ6R Pro, guided.
Esprit 100
ASI2600MC Pro @ -5c
Antlia ALP-T Dual Narrowband filter
Raspberry Pi running Stellarmate.
Pegasus Astro Autofocuser

Data:
Lights: 559@240s each. 37h16s total integration time.
Darks, flats and flat-darks.

Processing:
Calibrated and Stacked using WBPP with an automatic output pedestal and auto crop.
AutoLinearFit Toolbox script
Background Neutralization
SCNR Green Noise
SPCC
SXT

Stars:
Repaired HSV Separation Utility script
Arcsinh Stretch Interations
Color Saturation

Starless:
CreateHubblePaletteFromOSC (HOO) Toolbox Script
NXT
BXT (Had to reduce intensity from 90 down to 35 to keep it from exaggerating the dark areas in the middle of the target)
GHS Iterations, including linear black point adjustments
Curves Adjustment for minor intensity and saturation adjustments

Recombined with PixelMath: ~((~NGC7822_Starless)*(~star_mask))

Original
B
C
Final
D

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
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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.
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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	8686784
PixInsight job	87ZORWDG9QFGUE0K113PQ7ZTDIBM21UO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h01m14s.51
RA (top/left)	23h51m42s.36
RA (top/right)	23h57m14s.86
RA (bottom/right)	00h10m07s.33
RA (bottom/left)	00h05m36s.24

Dec (center)	+67°31′49″.0
Dec (top/left)	+68°20′33″.5
Dec (top/right)	+66°22′55″.5
Dec (bottom/right)	+66°40′53″.6
Dec (bottom/left)	+68°39′57″.4

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NGC7822 in HOO

NGC7822 in HOO

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