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



    
        

            Anthony Quintile
Iris Nebula NGC7023
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Iris Nebula NGC7023

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



    
        

            Anthony Quintile
Iris Nebula NGC7023
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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" (7h 44')

Integration: 7h 44'


Basic astrometry details

Astrometry.net job: 3046107

RA center: 21h01m32s.2

DEC center: +68°1004

Pixel scale: 0.554 arcsec/pixel

Orientation: 89.404 degrees

Field radius: 0.538 degrees


Resolution: 5807x3898

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

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Histogram

Iris Nebula NGC7023, 



    
        

            Anthony Quintile