Contains:  Solar system body or event
Luna with the RASA!, 



    
        

            Damien Cannane

Luna with the RASA!

Acquisition type: Lucky imaging
Luna with the RASA!, 



    
        

            Damien Cannane

Luna with the RASA!

Acquisition type: Lucky imaging

Technical card

Imaging telescopes or lenses: Celestron RASA 8"

Imaging cameras: ZWO ASI183MC Pro

Mounts: Orion Atlas EQ-G

Software: RC Astro GradientXTerminator  ·  DeepSkyColors HLVG (Hasta La Vista Green)  ·  Photoshop CC  ·  Deepsky Stacker Deep Sky Stacker (DSS)  ·  Pro Digital Software Astronomy Tools Actions Set

Filters: Astronomik L-2 UV-IR Block


Date: March 4, 2020

Time: 23:54

Frames: 240

FPS: 40.00000

Focal length: 400

Seeing: 3

Transparency: 6


Resolution: 1379x1793

Locations: My Back Yard, Copley, OH, United States

Data source: Backyard

Description

Before I bought my RASA, I asked the Solar System Imaging forum on Cloudy Nights why I hadn't seen any lunar images taken with the RASA. Several people who responded said that it wasn't viable "Because the RASA is too fast." The implication was that it would saturate at minimum gain/exposure. Others said that there wouldn't be any improvement over my Orion ED80T CF with the same camera.

After capturing data on the Horsehead and Rosette last night, I decided to give it a go...As it turns out, it wasn't difficult to do it, even with the small pixels of the ASI183MC. I set gain to half unity (55) and found that 4.7ms exposed around 50%. You don't know if you don't try.

Certainly, a sample of one doesn't prove anything, but I am very happy with how these results compared with my old ones. I estimated the seeing at about 3/5 from watching during capture, and that's supported by the FWHM I was achieving on the Rosette Nebula which was about as bad as normal for my area.

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