Hoffleit 2-1 next to M7 - Ptolemy's Cluster (klaussius)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: B287 · M 7 · NGC 6444 · NGC 6453 · NGC 6475 · PK355-04.1 · PK355-04.2 · PK356-04.1 · Ptolemy cluster · Ptolemy's Cluster

Hoffleit 2-1 next to M7 - Ptolemy's Cluster

This capture was done to "wrap up the night" after attempting to image Sharpless 2-9. Just 40 minutes worth of integration with the wrong filter attached, just to get an idea of what a future project could look like.

I guess I will make an image of it because it's certainly an awesome target, but this one with the CLS filter highlighted a tiny object that might otherwise have been harder to spot, so I thought I'd share: Hf 2-1, a tiny planetary nebula near M7 that is strikingly notorious in this image. Mouse hover to highlight.

This image contains a few object of note beyond Ptolemy's cluster. NGC 6453 is clearly visible to the left, and Hf 2-1 above it and just a little bit to the right. But there should also be a couple other planetary nebulae that I just cannot seem to resolve, even though they should be resolvable to a few pixels. Maybe they're trying to pass by stars. Wray 16-322 and Cn 2-1. I may try some lucky imaging in the future to try and spot them.

Mind you, this was imaged under terrible conditions. Seeing forecast was 2.5-3.0" FWHM, and it actually looked that bad. I had to discard the worst frames to get this much. I'll leave whether it's still passable or not up to the reader to decide.

Final
Original
C
D

C

Description: Found Cn 2-1

Uploaded: ...

D

Description: Better noise reduction

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	3620449
PixInsight job	M7XXUZGOU875STEBM8O864OZFSHQVTL5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	17h53m36s.87
RA (top/left)	17h48m59s.38
RA (top/right)	17h57m25s.95
RA (bottom/right)	17h58m12s.50
RA (bottom/left)	17h49m51s.40

Dec (center)	-34°46′25″.3
Dec (top/left)	-35°10′58″.9
Dec (top/right)	-35°26′59″.9
Dec (bottom/right)	-34°21′10″.9
Dec (bottom/left)	-34°05′17″.7

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Hoffleit 2-1 next to M7 - Ptolemy's Cluster

Hoffleit 2-1 next to M7 - Ptolemy's Cluster

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Hoffleit 2-1 next to M7 - Ptolemy's Cluster

Hoffleit 2-1 next to M7 - Ptolemy's Cluster

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