Image of the day 08/02/2016

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A squid in an oister shell

Technical card

Resolution: 5649x6000 job: 1165825

RA center: 316.999 degrees

DEC center: 60.079 degrees

Pixel scale: 2.097 arcsec/pixel

Orientation: 92.536 degrees

Field radius: 2.401 degrees

Locations: Observatoire personnel, Vérossaz, Valais, Switzerland


12 pannels mosaic of SH2-129 and OU4 - H-alpha, OIII, Red and Blue - LRGB composition
114 raw H-alpha images of 20 minutes each unbinned
99 raw OIII images of 20 minutes each unbinned
160 raw Red and Blue images of 1 minute each binning 2x2
75h20 total exposure from 04/19/2016, 04/27/2016, 04/28/2016, 04/29/2016, 05/04/2016, 05/06/2016, 05/17/2016, 05/20/2016, 06/09/2016, 06/21/2016, 06/22/2016, 06/23/2016, 06/27/2016, 06/28/2016, 07/16/2016, 07/17/2016, 07/18/2016, and 07/19/2016
A full resolution of 5940x6315 pixels for a total of 37 MPixels
FOV 3.4° x 3.7°
50 bias + 50 dark + 50 flats for calibration in CCDStack


Takahashi FSQ106ED @f/5 530mm focal length with ONAG XT (, Apogee Alta U8300 monochrome @-30°C and Astrodon narrowband H-alpha 5nm, OIII 5nm, and Red and Blue filters on 10micron GM2000 HPS II

Software: MaximDL to capture - SkySurveyor to calculate mosaic tiles and to automatically move the scope to the next tile coordinate - SharpLock to keep the optical train perfectly focused - CCDStack to calibrate, register, normalize, data reject and combine - Registar and PixInsight for mosaic assembly - Photoshop CC and PixInsight for non-linear streching.



David Lindemann

Sky plot

Sky plot


A squid in an oister shell , 


        David Lindemann