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Observation by Jim Tomney: Jupiter with GRS Aug 5, 2021

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Jim Tomney


Jim Tomney


2021 Aug 05 - 04:03


2021 Sep 08 - 21:10



  • 25cm f/6 Newtonian
  • ImageSource DFK21AU042 camera
  • TeleVue PowerMate Barlow 2.5x

60 fps


Towson, MD US

Target name

Jupiter with Great Red Spot


Jupiter with GRS Aug 5, 2021

About this image


Set up the scope again last night in hopes of getting the Great Red Spot, which according to S&T would transit Jupiter’s central meridian a couple minutes after midnight local time. Seeing was average (5/10) but I still got a reasonable capture. It appears that the spot has drifted a little west of the S&T predicted position since it seems to have already transited in the image below. I love how the GRS “wrecks” the South Equatorial Belt (SEB) which is dark and prominent preceding (i.e., to the right in the image), then is forced north as it encounters it to form the Hollow, and finally emerges pretty disheveled following it.


The NEBn continues to sport intense “barges” embedded within it. The serpentine disturbance in the Northern North Temperate Belt (NNTB) appears to be darkening and expanding compared to early June based on a BAA map of Jupiter from that time (here).


The moons added interest as well during the session: Ganymede to the far left, then Io (which popped out from Jupiter’s limb earlier in the session), and Europa off the western limb.

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