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Contains:  NGC 4516, IC 3478, IC 3476, M 88, NGC 4501, IC 3453
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Messier 88, 





    
        

            Daniel.P
Messier 88

Messier 88

Technical card

Imaging telescope or lens:CELESTRON EdgeHD 8

Imaging camera:QHYCCD QHY8L

Mount:Sky-Watcher NEQ-6 PRO GoTo SkyScan

Guiding telescope or lens:Skywatcher ED 80/600

Focal reducer:Celestron .7x

Software:EZCapPixInsight PHD Guiding 2.5.0

Accessory:Orion Starshoot Auto-Guider

Resolution: 3040x2024

Dates:April 4, 2014

Frames: 15x120" -10C bin 1x1

Integration: 0.5 hours

Flats: ~11

Bias: ~20

Avg. Moon age: 4.78 days

Avg. Moon phase: 23.68%

Mean SQM: 20.80

Mean FWHM: 3.20

Astrometry.net job: 1105433

RA center: 188.052 degrees

DEC center: 14.427 degrees

Pixel scale: 1.074 arcsec/pixel

Orientation: -129.384 degrees

Field radius: 0.545 degrees

Locations: Duc, Prayssas, Lot et Garonne, France

Description

I am processing some early data from 2014, when I was starting to use my new C8EHD.
I was constrained to 2 mn sub exposures maximum due to differential flexure with my parrallel guiding system.
I eventually realized that most of the flexure originated from the Orion XY Guide Star Finder !!!!

This specific picture is teh result of the selection of 15 out of 21 exposures (clouds and bad guiding).

Pre-processing done in Pixinsight :
- overscan area offset correction
- bias correction
- flat correction
- hot pixel correction
- debayer
- registration
- stack
Processing done in Pixinsight :
- backgroung color neutralisation
- color calibration using galaxy
- residual sky background substraction
- color saturation boost
- green neutral
- non linear image creation
Final image :
- jpeg calibration done in Mac Photo

Comments

Author

Daniel.P
Daniel.P
License: None (All rights reserved)
870
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Messier 88, 





    
        

            Daniel.P