Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7762  ·  NGC 7822  ·  The star 10Cas
The Big „?“ of the Night Sky in H-Alpha, 



    
        

            Sebastian B.
The Big „?“ of the Night Sky in H-Alpha
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The Big „?“ of the Night Sky in H-Alpha

The Big „?“ of the Night Sky in H-Alpha, 



    
        

            Sebastian B.
The Big „?“ of the Night Sky in H-Alpha
Powered byPixInsight

The Big „?“ of the Night Sky in H-Alpha

Equipment

Imaging Telescopes Or Lenses
Samyang 135mm f/2 ED UMC
Imaging Cameras
Canon Eos 800Da
Mounts
Skywatcher Star Adventurer
Filters
Optolong 7nm Ha clip
Accessories
Rollei Cable Release · COOWOO Objektivwärmer
Software
Adobe Photoshop CC · Lightroom · Vito Technology Star Walk 2 · Deep Sky Stacker 4.2.2 · Fifth Star Labs Sky Guide

Acquisition details

Dates:
Feb. 6, 2020
Frames:
56x180" (2h 48')
Integration:
2h 48'
Avg. Moon age:
11.68 days
Avg. Moon phase:
89.63%

Basic astrometry details

Astrometry.net job: 3235219

RA center: 23h59m51s.1

DEC center: +66°5219

Pixel scale: 3.932 arcsec/pixel

Orientation: 356.461 degrees

Field radius: 4.358 degrees

Resolution: 4760x6404

Locations: Backyard, Neuhofen an der Krems, Oberösterreich/Upper Austria, Austria

Data source: Backyard

Description

„The Big ?“

It consists of two emission nebulae, Sharpless 2-170/171 and spans from the constellation of Cepheus to Cassiopeia.

Due to waxing gibbous moon but very clear skies the last few days I was able to collect narrowband data with the H-Alpha filter that blocks the bright moonlight.

The filter reveals in just under 3 hrs of total integration time more faint details as I would get in 10 hours without it, but in exchange of non natural-looking colors - neither the stars nor the background or the nebulae itself have their natural color - even though I tried to make at least the nebulae a bit more vibrant- and natural-looking because I also like the reddish tone - it’s a bit more uncommon and there are already plenty of monochrome images out there.

... I think it looks cool :-).

In my opinion those two objects (especially in combination) are one of the most extraordinary and beautiful targets out there in the northern hemisphere.

Comments

Revisions

  • The Big „?“ of the Night Sky in H-Alpha, 



    
        

            Sebastian B.
    Original
  • Final
    The Big „?“ of the Night Sky in H-Alpha, 



    
        

            Sebastian B.
    B

B

Description: Cropped version

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Histogram

The Big „?“ of the Night Sky in H-Alpha, 



    
        

            Sebastian B.