Sh2-73 (Sharpless 73) / The Chel Grett Nebula (Brent Newton)

Celestial hemisphere: Northern · Constellation: Hercules (Her)

Sh2-73 (Sharpless 73) / The Chel Grett Nebula

Link: https://www.astronewton.com/chelgrett-2020

Sh2-73 (Sharpless 73) / The Chel Grett Nebula

Link: https://www.astronewton.com/chelgrett-2020

One of my favorite aspects of Astrophotography is that equipment of sufficient quality will almost always reveal something interesting, no matter where it is pointed in the night sky. Sh73 is hardly a well-known nebula but I wanted to see how I would handle such a dim and diffuse target. I also offer the name of the Chel Grett Nebula, as the shape of the nebula seems distinctly similar to the Breen warship class from Star Trek DS9. Anyway, processing:

Pre-processing:
- Darks, Flats Calib in BPP
- Cosmic Correction, Subframe Weighing, Star Align, Local Normalization, Image Integration

Housekeeping:
- Common Crop
- DBE
- LFit R, B to G
- RGB Channel Combine

L Processing:
- 2 passes Decon, once for galaxies, once for smaller stars
- Rista TGVD, MMT
- GHS + HT stretch
- ACDNR

RGB Processing:
- PCC
- Rista TGVD, MMT
- GHS + HT stretch
- SCNR, Inv, SCNR
- LRGB Combination

- Large scale NR via MMT
- Bills Star Reduction
- Color, Contrast tweaks with Curves
- Annotation

Original
Final
C
D

C

Description: 2022 Reprocess

Uploaded: ...

D

Description: Annotated

Uploaded: ...

WO Star 71
Central USA
PixInsight Addicts
Sharpless2 Objects
Unique or Unusal Deep Sky Targets

ASI1600MM-P 350mm FL
DSO

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Status	Basic success
Started	...
Astrometry.net job	6556782
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Sh2-73 (Sharpless 73) / The Chel Grett Nebula

Sh2-73 (Sharpless 73) / The Chel Grett Nebula

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Sh2-73 (Sharpless 73) / The Chel Grett Nebula

Sh2-73 (Sharpless 73) / The Chel Grett Nebula

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