Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7023
Iris Nebula in LRGB, NGC 7023 - 17hr stack, 



    
        

            Vikas Sahota
Iris Nebula in LRGB, NGC 7023 - 17hr stack
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Iris Nebula in LRGB, NGC 7023 - 17hr stack

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)
Iris Nebula in LRGB, NGC 7023 - 17hr stack, 



    
        

            Vikas Sahota
Iris Nebula in LRGB, NGC 7023 - 17hr stack
Powered byPixInsight

Iris Nebula in LRGB, NGC 7023 - 17hr stack

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Technical card

Imaging telescopes or lenses: Altair Astro 72edf deluxe

Imaging cameras: Altair Hypercam 183M PRO TEC

Mounts: DarkFrame Optics StellarDrive 6

Guiding telescopes or lenses: Altair Astro 60 mm guidescope

Guiding cameras: Altair GPCAM3 178M

Focal reducers: Altair Astro 0.80 Focal Reducer-Flattner

Software: PHD Guiding 2  ·  EQMOD EQAscom  ·  Stellarium  ·  SharpCap 3.2  ·  AstroPixel Processor  ·  Stellarium.org Stellarium Scope

Filters: Baader LRGB 2"

Accessory: Pegasus Astro Pocket Powerbox  ·  Pegasus Astro FocusCube  ·  Altair Astro DewZapper 3-4.5" OD HIGH POWER Dew Heater


Dates:May 12, 2019May 13, 2019May 15, 2019May 16, 2019May 21, 2019June 13, 2019June 23, 2019

Frames:
Baader B 2": 30x60" ISO3810 -15C bin 1x1
Baader B 2": 54x100" (gain: 100.00) -15C bin 1x1
Baader B 2": 12x300" (gain: 787.00) -15C bin 1x1
Baader G 2": 30x60" ISO3810 -15C bin 1x1
Baader G 2": 36x100" (gain: 100.00) -15C bin 1x1
Baader G 2": 12x300" (gain: 787.00) -15C bin 1x1
Skytech LPRO Max: 141x30" ISO3810 -15C bin 1x1
Skytech LPRO Max: 98x85" (gain: 100.00) -15C bin 1x1
Skytech LPRO Max: 88x130" (gain: 381.00) -15C bin 1x1
Skytech LPRO Max: 36x300" (gain: 787.00) -15C bin 1x1
Baader R 2": 20x90" ISO3810 -15C bin 1x1
Baader R 2": 24x150" (gain: 100.00) -15C bin 1x1
Baader R 2": 12x300" (gain: 787.00) -15C bin 1x1

Integration: 17.7 hours

Darks: ~51

Flats: ~70

Bias: ~261

Avg. Moon age: 12.70 days

Avg. Moon phase: 77.76%

Bortle Dark-Sky Scale: 6.00


Basic astrometry details

Astrometry.net job: 2764609

RA center: 21h 1' 21"

DEC center: +68° 12' 54"

Pixel scale: 1.394 arcsec/pixel

Orientation: 195.788 degrees

Field radius: 0.679 degrees


Resolution: 1824x1758

Locations: Backyard, Slough, Berkshire, United Kingdom

Data source: Backyard

Description

I had made several attempts on the Iris nebula back in May, and back to it a few days ago. Each effort yielded something but not enough. I decided to try and stack all the various sessions together, bit of a challenge but interesting if it worked. Early sessions were saved out in png so had to go converting lots of lights, flats, darks, bias, sifting through the subs and getting everything together to feed into AstroPixel Processor.
Its definately not optimal by any means, between the sessions things changed and I didnt intend to stack this lot together when I set out :)
So its a mix if different camera gains, with/without focal reducer, slightly different imaging train, filters, as things evolved.

Integration : 566 light frames, 17.6 hours
Luminance : Skytech LPRO , 9.6hours
Baader-R or LPRO + Baader-R : 2.5hours
Baader-G or LPRO + Baader-G : 2.5hours
Baader-B or LPRO + Baader-B : 3hours

Comments

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Iris Nebula in LRGB, NGC 7023 - 17hr stack, 



    
        

            Vikas Sahota