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Jupiter's GRS transit RGB and Methane band images, 





    
        

            Niall MacNeill

Jupiter's GRS transit RGB and Methane band images

Technical card

Resolution: 3749x5624

Date:May 14, 2019

Time: 18:20

Seeing: 4

Transparency: 8

Locations: Home property, Wattle Flat, NSW, Australia

Data source: Backyard

Description

I made two RGB runs of Jupiter with the GRS in transit and the moons Io and Ganymede in attendance, both previously posted. The seeing was better for the first run as you can see here. However, between the two runs I made my first Methane Band image of Jupiter. Here I present it between the two colour images for comparison, north up.
The Methane Band presents considerable challenges due to the much smaller number of photons getting through to the sensor and its lower sensitivity (QE) at this wavelength (890nm). As I was only getting 1.5-2 frames per second, I videoed for a full 15 minutes. Of course during that time the planet's rotation would normally smear out any observable features, however, WinJUPOS has the nice facility to derotate a video stream....i.e. derotate every single frame of the video to the central time stamp. Thus when the video is quality assessed and stacked with Autostakkert, all the features align. I was very pleased to see how well this worked and considerable detail is apparent in the methane image.

Comments

Author

macnenia
Niall MacNeill
License: None (All rights reserved)
2044
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Jupiter's GRS transit RGB and Methane band images, 





    
        

            Niall MacNeill