Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7023  ·  NGC7023  ·  VdB139
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Iris Nebula NGC7023, 



    
        

            Anthony Quintile
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Iris Nebula NGC7023

Getting plate-solving status, please wait...
Iris Nebula NGC7023, 



    
        

            Anthony Quintile
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Iris Nebula NGC7023

Imaging telescopes or lenses: Celestron Nexstar 8SE

Imaging cameras: Pentax K3 II

Mounts: Losmandy G11 Gemini 2

Guiding telescopes or lenses: Celestron Nexstar 8SE

Guiding cameras: ZWO ASI120MM Mini

Focal reducers: Starizona SCT Corrector II - 0.63X

Software: Phd2  ·  Photoshop CC 2019  ·  DeepSkyStacker (DSS) deepskystacker

Accessory: Celestron OAG #93648


Frames: 116x240"

Integration: 7.7 hours


Astrometry.net job: 3193595

RA center: 21h 1' 28"

DEC center: +68° 10' 45"

Pixel scale: 0.555 arcsec/pixel

Orientation: -89.133 degrees

Field radius: 0.410 degrees


Resolution: 4331x3082

Locations: Doney Mountain Picnic Area, Wupatki National Monument, Flagstaff, AZ, United States

Data source: Traveller

Description

This is the culmination of months of learning how to set up and use my Celestron 8" SCT and Losmandy G11 with an OAG.

Some lessons learned:

Longer FL AP is tough.
SCTs have mirror shift, must use an OAG to guide long exposures.
SCTs need a bunch of collimation and alignment to get round stars.
The Celestron FR/FF does not fix coma on the stars in the corners, the Starizona CC/FR does.
The Losmandy really benefits from lots of proper set up including adding a belleville washer to the RA worm and adding PEC.
Seeing is at least half the AP battle.
Dither or die, especially with a stock DSLR, especially if the ambient temps are not cold.
Dark skies are almost cheating.

Comments

Revisions

  • Iris Nebula NGC7023, 



    
        

            Anthony Quintile
    Original
  • Iris Nebula NGC7023, 



    
        

            Anthony Quintile
    C
  • Final
    Iris Nebula NGC7023, 



    
        

            Anthony Quintile
    D

Sky plot

Sky plot

Histogram

Iris Nebula NGC7023, 



    
        

            Anthony Quintile