Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 63  ·  NGC 5055  ·  Sunflower Galaxy
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Astro-Physics AP130GTX First Light, 



    
        

            wadeh237
Astro-Physics AP130GTX First Light
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Astro-Physics AP130GTX First Light

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Astro-Physics AP130GTX First Light, 



    
        

            wadeh237
Astro-Physics AP130GTX First Light
Powered byPixInsight

Astro-Physics AP130GTX First Light

Technical card

Imaging telescopes or lenses: Astro-Physics AP130GTX

Imaging cameras: QSI 690WSG-8

Mounts: Astro-Physics AP1600GTO CP4 with Absolute Encoders

Software: NINA  ·  Pleiades Astrophoto PixInsight Core 1.8  ·  Astro-Physics Command Center (APCC) Software

Filters: Astrodon LRGB CCD Gen II E-Series 1.25"

Accessory: Pegasus Astro Ultimate Power Box V2


Dates:April 5, 2021

Frames: 32x600" (5h 20')

Integration: 5h 20'

Avg. Moon age: 23.25 days

Avg. Moon phase: 38.36%


Basic astrometry details

Astrometry.net job: 4384090

RA center: 13h 15' 49"

DEC center: +42° 1' 55"

Pixel scale: 0.881 arcsec/pixel

Orientation: 2.373 degrees

Field radius: 0.496 degrees


Resolution: 3232x2452

Locations: Sunflower Ranch, Ellensburg, Washington, United States

Data source: Backyard

Description

This is the first light image for my new Astro-Physics AP130GTX refractor.

This was a short session, with just about 5.5 hours total exposure. It was also a torture test for the accuracy of my AP1600 mount with absolute encoders, due to poor conditions.

It was clear, with ok transparency, but the seeing was quite poor and the wind was blowing at about 25mph or so for most of the night, with gusts strong enough to rattle the windows on occasion. The exposures were all 10 minutes long, at about 0.8 arc seconds per pixel - and unguided with an APCC Pro tracking model of about 180 points. I did not discard any sub exposures.

I was mainly interested in the performance of the configuration, so image processing was minimal. After image integration, I spent about 25 to 30 minutes on it. The steps were as follows:

ImageCalibration with bias and flats (I don't use dark frames with this camera)

CosmeticCorrection

SubframeSelector to weight images (they all came out with about the same weight)

StarAlignment

ImageIntegration

DynamicCrop

MureDenoise

ChannelCombination

PhotometricColorCalibration

DynamicBackgroundExtraction

HistogramTransformation to make non-linear

CurvesTransformation to tweak color balance

ColorSaturation

I did not do any noise reduction (other than MureDenoise) or sharpening.

The capture details were as follows:

Telescope: AP130GTX

Mount: AP1600CGO-CP4 with Absolute Encoders, unguided

Camera: QSI 690-wsg8 with Astrodon RGB filters

Capture Software: NINA

Processing Software: PixInsight

Exposures: 11x600 Red, 11x600 Green, 10x600 Blue, all unbinned

Comments

Sky plot

Sky plot

Histogram

Astro-Physics AP130GTX First Light, 



    
        

            wadeh237