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Technical card

Resolution: 1527x1152 job: 1729955

RA center: 10.580 degrees

DEC center: 41.258 degrees

Pixel scale: 3.581 arcsec/pixel

Orientation: 8.940 degrees

Field radius: 0.951 degrees

Locations: Home observatory, Copenhagen, DK-2270 Kastrup, Denmark


13 Aug-2017, LUM raw data taken with the portable EQ shown here:
LUM exposure=125x30sec+14x120sec.
Old m31 color data added, mainly taken from a Picture made by Mr. Niels Haagh, TTS owner.
EQ used at that time: Mount TTS-160 Panther, TEC-140 scope, Canon eos5d camera. Total exposure: 64x300sec.
Kind regards Niels



Niels V. Christensen



Minor color and level adjustments performed. Added lum info from 3 close-up 16" SCT pictures as mentioned here: Used a HP filter with a mask on the dark info. in the galaxy. After reduction to 33% 16bit tif size/format, the stars were/looked too dominant in the picture=>Select stars and feathered gaussian blur action was performed and I also used a fade min filter with a given opacity to reduce the dominant star look in the reduced sized picture. Kind regards Niels

Sky plot

Sky plot


M31 Lum-color picture, Niels V. Christensen

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