|Celestron C14, 2x Powermate. ASI 120MM
Focal Length (Measured) about 8600mm
Image Scale at capture 0.09"/px (~ 30 miles/px)
Alt 43°, Apparent diameter 13.18"
Astronomik R-G-B-NIR filters. Starlight Xpress Fitler Wheel
FireCapture for Capture (Highly Recommended)
Two sets of data, each 3000 frames/filter captured as 16 bit SER. Best 350 of each selected
The images from each set were then combined using WinJuPos. The "Red" channel is actually
a composite of 4 images, the two Red images and the two NIR images.
Martin Lewis has shown that there is a diffraction ring artifact whose position relative to the
limb of the planet is a function of the wavelength captured (and of the diameter of the OTA).
By combining the R and NIR images this ring artifact was averaged out.
|Mars on the Ides of March
15 Mar 2014 0921 UTC/0221 PST
Mouseover for names of some geographic features