Captured on July 31, 2026, from Tunis, Tunisia, this detailed planetary observation of Saturn reveals a transient atmospheric white spot in the northern hemisphere, independently cross-checked and confirmed across two distinct optical setups. Simultaneous imaging via a 14-inch Celestron EdgeHD and a 16-inch Sky-Watcher Dobsonian utilizing four distinct filter configurations detected the feature at identical planetary coordinates; its persistence across deeper infrared wavelengths and higher-altitude Rayleigh-scattering bands indicates a vertically extended convective storm cell tied to seasonal northern atmospheric dynamics rather than a localized surface albedo artifact. The high-resolution composite additionally resolves fine internal ring dynamics—notably faint radial spokes in the B ring and a crisp Cassini Division separating it from the A ring—while capturing Enceladus in mid-transit alongside Tethys and Mimas positioned to the east. The overall data integration of 6 minutes and 40 seconds was processed using WinJUPOS, AutoStakkert!, and PixInsight to maximize cloud-deck contrast and optical alignment.

Image Description and Details : Imaging Telescopes Or Lenses
Samyang 135mm F2.0 ED UMC
Imaging Cameras
ZWO ASI533MC Pro
Mounts
Sky-Watcher EQ6-R Pro
Filters
Optolong L-eXtreme 2"
Accessories
ZWO ASIAIR Pro
Software
Adobe Photoshop · Pleiades Astrophoto PixInsight
Guiding Telescopes Or Lenses
ZWO 30mm Mini Guider Scope
Guiding Cameras
ZWO ASI120MM
Acquisition details
Dates:
Jan. 28, 2023 · Jan. 29, 2023
Frames:
Optolong L-eXtreme 2": 60×300″(5h) ISO100 f/3.2 -10°C bin 1×1
Optolong L-eXtreme 2": 56×300″(4h 40′) (gain: 100.00) f/3.2 -10°C bin 1×1
Integration:
9h 40′

Copyright: Makrem Larnaoutn