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Contains:  NGC 1798
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SNR Sh2-221, PN Sh2-216 and C/2017 T2 Panstarrs

Technical card

Imaging telescopes or lenses: Samyang 135 f/2

Imaging cameras: Atik One 6.0

Mounts: Skywatcher EQ8 Pro

Guiding telescopes or lenses: Guiderscope 53mm

Guiding cameras: ZWO ASI120MM

Software: EQAscom EQMOD  ·  Incanus APT Astro Photography Tool  ·  Adobe Phosotshop CS5  ·  Pixinsight 1.8  ·  PHD2  ·  SkytechX Planetarium

Filters: Baader Ha 1.25" 7nm  ·  Baader LRGB 1.25'' CCD Filters  ·  Baader OIII 1.25" 8.5nm


Dates:Dec. 3, 2016Dec. 3, 2019Dec. 26, 2019Dec. 28, 2019Feb. 28, 2020

Frames:
Baader Ha 1.25" 7nm: 12x1800" bin 1x1
Baader Ha 1.25" 7nm: 36x900" bin 1x1
Baader L 1.25" CCD Filter: 140x70" bin 1x1
Baader OIII 2" 8.5nm: 33x900" bin 1x1
Baader RGB 1.25'' CCD Filters: 120x150" bin 1x1

Integration: 31.0 hours

Avg. Moon age: 3.43 days

Avg. Moon phase: 16.44%


Basic astrometry details

Astrometry.net job: 3313028

RA center: 4h 50' 39"

DEC center: +46° 45' 18"

Pixel scale: 7.247 arcsec/pixel

Orientation: 358.429 degrees

Field radius: 4.348 degrees


Resolution: 3796x2063

Locations: Backyard, Balatonszárszó, Hungary

Data source: Backyard

Description

This is a 2 panel mosaic. The 2 main nebulas are the supernova remnant Sh2-221 (G160.4+02.8) and the planetary nebula Sh2-216 (GN 04.41.3), but there are many other objects, dark nebulas, small clusters: NGC1605, NGC1798, Sh2-216, Sh2-221, Sh2-217, Sh2-219, B15, B17, B15.

Additionally the comet C/2017 T2 Panstarrs was crossing this area, which I captured at 2019-12-03 20:50 UTC, just a few frames, and put it on the top.

The objects are mostly quite dim, especially the SNR, so I enhanced the RGB view with many hours of HaO3 layer.

Some more data:
Sh2-221
Distance: 2600 ly
Age: cca. 6600 years
https://ui.adsabs.harvard.edu/abs/2007A%26A...461.1013L/abstract

Sh2-216
Distance: 390 ly
Age: 660.000 years (!!)
https://www.g-vo.org/pmwiki/uploads/About/aa7166-07.pdf

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SNR Sh2-221, PN Sh2-216 and C/2017 T2 Panstarrs, 



    
        

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