Contains:  Solar system body or event

Image of the day 12/19/2022

    Saturn with Ring Spokes on September 21st, 2022, 


            Ethan Chappel

    Saturn with Ring Spokes on September 21st, 2022

    Acquisition type: Lucky imaging

    Acquisition details

    Date: Sept. 21, 2022

    Time: 04:31

    Exposure per frame: 12 ms

    CMI: 73.00

    CMII: 104.60

    CMIII: 109.70

    Resolution: 850x550

    File size: 97.8 KB

    Locations: Home, Cibolo, Texas, United States

    Data source: Backyard


    Excellent seeing while imaging Saturn on September 21st, 2022.

    Visible on the B-ring left of the planet is a small dark spot. I initially assumed it was a post-processing artifact, but upon checking the individual images it was clear this was a real feature moving through the ring. These dark spots have been termed "spokes" and are seasonal phenomenon of the rings seen in 8-year periods centered on Saturnian equinoxes. The next one coming up in 2025 means we are just beginning to see spokes appear on the B-ring. We should continue to see more over the next few years as our view of the rings continue to close.

    Animation of Spokes