Mars on November 21, 2020 (Mars Filter) (JDJ)

Contains: Solar system body or event

Mars on November 21, 2020 (Mars Filter)

Acquisition type: Lucky imaging

Imaged Mars in OSC RGB using a Celestron Mars Filter on the evening of November 20, 2020 (Nov. 21 in UTC) with good seeing and above average transparency. Mars was showing a disc 16.3 arcsecs in diameter at magnitude of -1.5. The prominent dark albedo at the meridian is Mare Cimmerium.

I picked up the Celestron Mars filter back in 2018 for the last Mars opposition and it gave decent results, but I haven't used it until now during the 2020 opposition. I made one set of imaging runs (3x 4 minute video captures) this night for grins to see how the results compare to images taken through UV-IR cut and IR filters. Not sure exactly what the bandpasses are for the Celestron filter, but the onscreen results look very much like the IR pass images, so likely a healthy red wavelength bandpass. Nothing special in these results and I certainly wouldn't trade using this for the standard UV-IR cut and IR pass filters.

Imaged with a C8 Evo, ZWO ADC, Celestron Mars filter, and ZWO ASI224MC. Imaging train was configured to give ~F/20 (~0.18 arcsec/pixel). Image capture using Firecapture with gain set at 250 and an exposure of 2.5 ms. Stacking in AutoStakkert3 (best 5% of ~70,000 frames captured over 240 seconds). Color balancing and Wavelet sharpening in Registax6. De-rotated and combined 3 images in Winjupos.

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Description: BW version (looks a lot like the IR pass filter images)

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Schmidt-Cassegrain Telescope (SCT) Imagers
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