Celestial hemisphere:  Northern  ·  Constellation: Aquila (Aql)  ·  Contains:  The star 31Aql  ·  The star ω1Aql
LDN 673 in Aquila, Walter Koprolin
LDN 673 in Aquila
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LDN 673 in Aquila, Walter Koprolin
LDN 673 in Aquila
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Equipment

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Acquisition details

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Description

Notes on image acquisition: The subs were taken at two different observation sites in the Alps in August and September 2020 with a single-shot color CMOS camera. No filter was needed. I had to reject some subs due to bad seeing conditions. The total exposure time of the remaining images adds up to only 2.1 hours.

Processing steps: File selection and bias/dark/flat calibration, star alignment and image integration, background flattening, photometric color calibration, noise reduction, deconvolution, non-linearization, star-background separation, local contrast enhancement, color enhancement, star size reduction, re-adding of the stars.

Notes on image processing: Some of the brightest stars had extensive halos which required reduction.

Comments

Sky plot

Sky plot

Histogram

LDN 673 in Aquila, Walter Koprolin