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  1. Galaxy NGC 4945 in Centaurus Details: Galaxy NGC 4945 in Centaurus 19 May 2018 Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7\ Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.91um pixels) image Plate Solver script version 5.0 =========== Resolution ........ 0.586 arcsec/px Rotation .......... North is up Focal ............. 1375.43 mm Pixel size ........ 3.91 um Field of view ..... 43' 27.2" x 28' 54.2" Image center ...... RA: 13 04 51.790 Dec: -49 30 37.17 ========== Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 19 May 2018 ): 10 sets of sub-images with exposure duration for each set doubling ( 1/2th sec to 240 sec ) all at ISO250. ( 41 x 240sec + ~8 each forthe other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 10 sets HDR combination Pixinsight May 2018
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