Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888  ·  Sh2-105
Getting plate-solving status, please wait...
NGC 6888 in HOO with OSC camera experiment, 



    
        

            Cedric Raguenaud
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NGC 6888 in HOO with OSC camera experiment

Getting plate-solving status, please wait...
NGC 6888 in HOO with OSC camera experiment, 



    
        

            Cedric Raguenaud
Powered byPixInsight

NGC 6888 in HOO with OSC camera experiment

Imaging Telescopes Or Lenses
Skywatcher 300/1500
Imaging Cameras
QHYCCD 183C
Mounts
Skywatcher EQ8 pro
Filters
STC Dual Narrowband filter
Accessories
Home made focuser · Baader MPCC Mark III Coma Corrector
Software
PixInsight 1.8 Ripley
Guiding Telescopes Or Lenses
TS-Optics OAG
Guiding Cameras
ZWO ASI120MM

Acquisition details

Dates:
Aug. 5, 2020 ·  Aug. 6, 2020 ·  Aug. 23, 2020
Frames:
STC Dual Narrowband filter: 66x600" (11h) (gain: 16.00) -15°C bin 1x1
Integration:
11h
Avg. Moon age:
12.98 days
Avg. Moon phase:
71.20%
Bortle Dark-Sky Scale:
4.00
Mean SQM:
21.57

RA center: 20h12m04s.476

DEC center: +38°2017.87

Pixel scale: 0.826 arcsec/pixel

Orientation: 174.055 degrees

Field radius: 0.281 degrees

More info:Open 

Resolution: 2048x1357

Locations: ORCA Observatory, Near Matha, Charente-Maritime, France

Data source: Own remote observatory

Description

I normally shoot colour with an OSC camera because of time constraints (I don't have the clear nights to multiply by 3 the integration time). But I'd like to make SHO or HOO images too. So for this image I tested a dual narrowband filter that maps Ha to red and OIII to blue.

This is why the diffraction spikes are like morse code and alternate red and blue dashes (I don't know how the filter is built to explain it).

The processing is then a mix of colour and mono processing: colour up for calibration and until debayerisation. From there, extract the red and blue layers and process them like mono layers.

Because of weather (heat and thunderstorms) I only managed to get 2 short nights for the experiment. Ideally I'll add time whenever possible.

Comments

Revisions

  • NGC 6888 in HOO with OSC camera experiment, 



    
        

            Cedric Raguenaud
    Original
  • Final
    NGC 6888 in HOO with OSC camera experiment, 



    
        

            Cedric Raguenaud
    B

Sky plot

Sky plot

Histogram

NGC 6888 in HOO with OSC camera experiment, 



    
        

            Cedric Raguenaud

In these public groups

STC Dual Narrowband filter images