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Contains:  M 43, NGC 1982, NGC 1977, NGC 1980, M 42, Great Nebula in Orion, NGC 1976, NGC 1975, NGC 1981, NGC 1973, The star 45Ori, The star ιOri, The star θ2Ori, The star θ1Ori, The star 42Ori
Getting plate-solving status, please wait...


            Jean-Marie Locci


Technical card

Resolution: 3326x2503

Dates:Dec. 27, 2013Dec. 28, 2013Jan. 2, 2014Jan. 3, 2014

Astrodon H-alpha 5nm: 8x15" -15C bin 1x1
Astrodon H-alpha 5nm: 8x180" -15C bin 1x1
Astrodon H-alpha 5nm: 8x30" -15C bin 1x1
Astrodon RGB filter set: 24x180" -15C bin 1x1
Astrodon RGB filter set: 24x20" -15C bin 1x1
Astrodon RGB filter set: 24x5" -15C bin 1x1
Astrodon RGB filter set: 24x60" -15C bin 1x1

Integration: 2.3 hours

Darks: ~10

Flats: ~10

Bias: ~10

Avg. Moon age: 13.17 days

Avg. Moon phase: 14.78%

Bortle Dark-Sky Scale: 4.00 job: 156180

RA center: 83.761 degrees

DEC center: -5.249 degrees

Pixel scale: 1.830 arcsec/pixel

Orientation: -89.518 degrees

Field radius: 1.059 degrees

Locations: Home, Perth, Australia

Data source: Backyard


This is the result of a HDR composition mixing 5, 20, 60 and 180sec in RGB and 15, 30 and 180sec in Ha. The software used to compose the final HDR image is EasyHDR.



Jean-Marie Locci
License: None (All rights reserved)

Sky plot

Sky plot




            Jean-Marie Locci