Saturn And Mars

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Saturn and Mars
Taken by ed lomeli on August 25, 2018 @ Sacramento, California, USA

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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: Unavailable

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Details:

C9.25, 2.5X barlow and ASI 224MC camera (670nm IR pass filter for Mars). Conditions OK for Saturn but deteriorated for Mars. North and South up orientations for Mars animations. Could be small storm(s) at Saturn's northern polar area.

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Comments

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Ed,

Very nice images of Saturn and Mars, especially the GIFs of Mars. It looks like the 224MC performs very well with your setup. May I ask what the arc seconds per pixel were with your setup. When you attached a 670nm IR pass filter it looks like that is blocking wavelengths below 670nm which thus means that this is pretty much an IR image of Mars if I understand your setup, although the blue and green filters in this camera pass light pretty good from 800-850nm, not sure what those filters would see at that wavelength though.

Cheers, Mike Olason

Posted by Icylander2 2018-08-25 23:09:40

Thanks. The formula I think is: Arcsecs per pixel = (206.3 * pixel size in uM) / focal length of scope in mm / barlow.

C9.25

- Aperture: 235 mm

- Focal length: 2350 mm

- Focal ratio: f/10.0

- Barlow/Focal reducer: 2.5X Focal ratio: f/25.0 Focal length: 5875mm

ASI224M

- Pixel size: 3.75 µm

Answer: 206.3 X 3.75 / 2350 / 2.5 = Resolution: 0.13/pixel

Yes, an NIR image at 670nm. I havent tried filters at the IR wavelengths of 800-850nm yet. I would expect an increase in gain/noise. What you would see would depend on which target you are using it on.

http://astronomy-imaging-camera.com/wp-content/uploads/QE-ASI224.jpg

Posted by Euclid 2018-08-26 01:48:28

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