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Contains:  Solar system body or event
Mars 27 Feb 2020 - 5 min stack, 



    
        

            Seb Lukas

Mars 27 Feb 2020 - 5 min stack

Acquisition type: Lucky imaging

Technical card


Date:Feb. 29, 2020

Time: 18:43

Frames: 14284

FPS: 74.00000

Focal length: 9144

CMI: 104.70

Seeing: 5

Transparency: 9


Resolution: 1047x898

Locations: Gungahlin, Canberra, Australian Capital Territory, Australia

Data source: Backyard

Description

Mars before sunrise on 1 Mar 2020 AEST.

Seeing was very good on the first day of southern autumn here in Canberra. Imaged the planet between 5:38 and 7:23 am AEST with this being the best single stack of the session. This capture combines 14,000 best frames centred on 5:43 am. I was encouraged by live preview showing surface features not detectable couple of nights before. I tweaked exposure to better handle F30 imaging ratio with average frame rate at 74 per second.

The view clearly shows a line of three Tharsis volcanoes crossing the terminator with Olympus Mons in the west. Each peak sports a bright orographic cloud. There's also a cloud / mist in Valles Marineris canyon rotating out of view. South Polar Cap is at its maximum extent with dark Mare Sirenum flanking it to the north. Solis Lacus ('the Eye of Mars') is also easy to spot and Arcadia sports a dark area.

I increased the image size by 2/3rds to make the detail more obvious. I have also re-oriented it along the polar axis. As is usually the case with small angular diameter Mars, strong edge rind was present, both on inside and outside of the planet. I brushed it away in Photoshop taking care not to impact the real data.

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Author

Seb
Seb Lukas
License: Attribution-NonCommercial-NoDerivs Creative Commons
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Mars 27 Feb 2020 - 5 min stack, 



    
        

            Seb Lukas