Draco Triplet landscape - Quick (and dirty!) test of APO 80/384 (Mau_Bard)

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: 12 Dra) · 12 iot Dra · Ed Asich (ι Dra · Edasich · NGC 5976 · NGC 5981 · NGC 5982 · NGC 5985 · NGC 5989 · The star Edasich

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Draco Triplet landscape - Quick (and dirty!) test of APO 80/384

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Draco Triplet landscape - Quick (and dirty!) test of APO 80/384

This was initially intended to be a small set (#6) of test exposures for my new 80mm APO. Therefore, I took no biases, no darks and no flats. On the occasion, I rescued from the drawer an unmodded Canon EOS 77D.
Having the subs there, I decided to process them with PixInsight to see how the end-to-end process performed.

The stacked image was affected by a strong chromatic noise, that came not as a surprise, being the camera not refrigerated. A pleasant surprise was, conversely, the fact that the Canon-77D did not show, at least in the light frames, any visible ampglow. Coming to the optics, the gradient could be easily eliminated by PI-DBE alone. This was a pleasant experience to me - I am used to a Newtonian with a long 2" terminal (coma corrector plus extensions) that produces a much harder-to-tame vignetting.

Slight star elongation is visible close to the corners, probably the distance between reducer and sensor requires some fine tuning.

* * *
NGC 5981 NGC 5982 and NGC 5985 constitute the Draco Galaxy trio Holm 719 or KTG 64, and also the so-called NGC 5982 Group together with NGC 5976, NGC 5987 and NGC 5989.

NGC 5985 is about 140 ± 35 Mly away, NGC 5982 123 ± 34 Mly and the small edge-on NGC 5981 about 86 ± 7 Mly away. The three galaxies reside at different distances so the triplet could be purely a line of sight effect, however, given the errors in astronomical distance measurement, they could still be related.

Light Polluted skies
Optolong L-Pro filter
Broadband under Bortle 7/8/9
Imaged with N.I.N.A.
N.I.N.A. Users
Imagers of Italy
Musical Imagers
Suburban Astrophotography
PixInsight Addicts

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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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Status	Advanced success
Started	...
Astrometry.net job	5739908
PixInsight job	N8YX33557PZF0PHS8EZJ2NSHT68RUE0U
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	15h38m24s.12
RA (top/left)	15h41m06s.90
RA (top/right)	15h24m22s.83
RA (bottom/right)	15h35m58s.40
RA (bottom/left)	15h52m46s.73

Dec (center)	+59°22′03″.4
Dec (top/left)	+61°11′31″.7
Dec (top/right)	+58°54′44″.2
Dec (bottom/right)	+57°32′17″.10
Dec (bottom/left)	+59°43′34″.9

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Draco Triplet landscape - Quick (and dirty!) test of APO 80/384

Draco Triplet landscape - Quick (and dirty!) test of APO 80/384

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Draco Triplet landscape - Quick (and dirty!) test of APO 80/384

Draco Triplet landscape - Quick (and dirty!) test of APO 80/384

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