Jupiter 20160120 10:41UT

Jupiter 20160120 10:41UT

It has been 7 days since the last short, also frigid, imaging session.
After 05:30 EST this morning (Wednesday in case this note gets delayed), it was -16C.

The hand controller required ungloved hands to operate.

Jupiter was 42 deg altitude, 220 deg azimuth and about 41 arcseconds large.

20cm sc scope with x2 celestron barlow, zwo asi 120mc camera
effective focal length 4150mm, effective fratio f21
A full circumference 20w dew heater around the corrector plate running at about 60% and a 35cm dew shield helped keep the optics clear.

The best image was the first image.
90 second run with 30ms exposure, gave only 121 frames captured. Funny that… should be around 2700. some slowness in the system.

Region of interest was 480×480 pixels

No great red spot. It’s been some time since I last saw it…

Mars 20160120 11:04UT

Mars 20160120 11:04UT


Closer to 06:00 I did a quick run on Mars since it was up and then Saturn, both after the spectacular overhead ISS pass.
Mars was 32 deg altitude, 120 deg azimuth and about 6 arcseconds large
60 second run with 18ms exposures giving 3388 frames captured with a region of interest of 288×256 pixels
Maybe with imagination there are surface features but mostly atmospheric dispersion correction needed!
Saturn 20160120 11:09UT

Saturn 20160120 11:09UT


Saturn was more challenging, right over the Kingston light pollution dome at an altitude of 14 deg and azimuth of 138 deg, with a 36 arcsecond size (with rings).
60 seconds with 132ms images capturing 455 frames and a region of interest of 544×512 pixels.
Very poor image, not even a cassini division appearing.
But it can only get better

Processing:
castrator to shrink 2GB .avis down to 700Mb, making a consistent pixel size count and centering the objects.
autostakkert!2 to stack using 25% of the best frames, into .png format images
registax6 for wavelet processing.