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Contains:  NGC 253, Sculptor galaxy
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NGC 253 - Sculptor Galaxy (Theli, APF-R, v4), 


            Martin Junius
NGC 253 - Sculptor Galaxy (Theli, APF-R, v4)
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NGC 253 - Sculptor Galaxy (Theli, APF-R, v4)

Technical card

Dates:Sept. 3, 2016

Frames: 29x480" ISO800

Integration: 3.9 hours

Darks: ~9

Flats: ~20

Bias: ~50

Avg. Moon age: 2.00 days

Avg. Moon phase: 4.46%

Bortle Dark-Sky Scale: 1.00

Mean SQM: 21.80

Temperature: 14.00

Basic astrometry details job: 1667716

RA center: 0h 47' 34"

DEC center: -25° 17' 24"

Pixel scale: 0.589 arcsec/pixel

Orientation: 270.026 degrees

Field radius: 0.475 degrees

Resolution: 4829x3219

Locations: IAS Observatory Hakos, Hakos, Namibia


New processing of last year's data, see also

Stacking with Theli, using only frames with FWHM <3.20, for a total of 26 R, 29 G, 24 B x 480s, color calibration with NOMAD.

For the final sharpening in Photoshop I applied the APF-R technique for the first time, see



Martin Junius
License: Attribution-NonCommercial-NoDerivs Creative Commons

Sky plot

Sky plot


NGC 253 - Sculptor Galaxy (Theli, APF-R, v4), 


            Martin Junius