Despite late nights and compulsive alarm setting, I still haven't seen the impact mark on Jupiter.
The impact mark, first recorded on July 19, apparently transits just over 2 hours after Jupiter's Great Red Spot, and a favourable event was predicted for tonight (Saturday, August 01, at 23:34 SAST).
Despite day-long cloud, it seemed clear enough to attempt an observation late night. Maphefo (8-inch f/6 Dob) was ready and waiting, and soon after 23:00 I was keeping a vigil at the eyepiece.
The seeing was OKish, I guess. Sharp detail swam into view from time to time, and I even used the 6mm Ortho with a 2x Barlow for a barely useable 400x. Best views were at 130x (18mm Ortho + Barlow).
Despite my efforts, nothing out of place was visible in Jupiter's southern nethers.
The Southern Tropical Zone was particularly white and quite clearly defined - nice. The Northern Equatorial Belt had a pronounced dark thickening, which transited not long after the impact mark was supposed to. I'm not a planetary observer, so I have no idea what the marking is called. In any event, no shadow transits were indicated.
By 23:45 the cloud cover had increased substantially, and Maphefo was laid to rest.
By SMS came the news that neither Hans nor Ed had any luck spotting the impact mark either.
nothing more to see. please move along.