Contains:  Solar system body or event
Saturn at Opposition, Aug 2, 2021, psychwolf

Saturn at Opposition, Aug 2, 2021

Acquisition type: Lucky imaging
Saturn at Opposition, Aug 2, 2021, psychwolf

Saturn at Opposition, Aug 2, 2021

Acquisition type: Lucky imaging

Equipment

Loading...

Acquisition details

Loading...

Description

This is a first imaging attempt on Saturn during the Opposition, also with the rig described here. I ran a 5 minute .SER file through PIPP using all automatic settings to output the best 30% as AVI. I then ran that through AutoStakkert! taking the best 30%, but again on no settings customization. The end result was far more pixelated in comparison to the visual view still, I left a lot of detail on the table I can take another shot at processing. I think I had the exposure at 50ms, gain at 300. 

Visually, Saturn was as crisp as I've ever seen it between 11:30pm to 1:00am, looking through a Vixen FL90s fluorite doublet refractor, 90mm lens, with a focal length of 810mm, f/9.0, which is a bit of a rare bird scope. I'm enjoying it more as I lean into its strengths, and it really kept the planet and moons sharp and bright without chromatic aberration or haloing that I could see. Rather than manually push pointing as I often keep the good mount for an astrophotography target, I'd rewarded myself and mounted it on the EQ6-R Pro, so it was nice and steady and could be GoTo controlled/tracked. This allowed me to spend more time visually, with a hand control this time, while not worrying about a photo rig, even if it was tempting and I eventually took pics in the end. I used the Baader T2 90 deg. Zeiss diagonal with 34mm clear aperture, and this seemed to complement it well - sticking with Vixen 1.25" Lanthanum eyepieces.

I viewed a variety of powers, and Saturn stayed very sharp down to a 2.5mm eyepiece (45 deg FoV, 20mm eye relief). So I thought why not and pushed an Orion  2x 4-element Barlow in front of the 2.5mm. Interesting! Saturn was.. there and in shape, after a refocus and a bit of following the bright light to track it in view, but I didn't find value in that degree of enlargement and preferred the 2.5mm eyepiece mated well to the scope without distortion. The 5mm LV was equally clear, and the precision allowed me to pick out the moons a bit more (4 dots, one close then 3 further out). The Cassini division was clearly visible, as well as many stripes. At 20mm, it was a dot, but you could still see the ring distinction very sharply with gaps, and it's worthwhile to start at that view before zooming to 10mm and lower. I'm not sure how else to describe a visual view, so after I had my fill I substituted the eyepiece for a planetary camera, with an IR filter, and powered on Sharpcap. This resulting photo doesn't come close to doing it justice as it's a very novice stack attempt. It also needs to be flipped to be accurate, but it's the orientation seen from the eyepiece.

Comments

Histogram

Saturn at Opposition, Aug 2, 2021, psychwolf

In these public groups

Milwaukee Astronomical Society