The Occultation of a W=12.0 Star for 0.66s by Asteroid 1999 CJ8

Fri eve Sept 4, 2026 at 8:59:19pm

OWc page

 

This is a decently bright event in a dark sky with good weather predicted, and a good rank. My plan is to go running this afternoon, and then drive to Canham Rd in northern Scotts Valley for the event when I get off the trails in Fall Creek.

Alt=33, Az=192 in Sagittarius, just 1/2 degree east of 5th mag open cluster M23. Easy to find

     

 

Results:

I was the only one to try this; right after my Fall Creek run of 12 miles, I drove straight to Canham Rd and the parking lot for the Glenview Open Space, as I've used before. Weather was perfect; calm, no clouds, no moon. I got on target and recorded at 2x, and the usual Gain=41. It looked like a miss as I watched, but a short event might be missed by eye.

 

Reductions 9/19/26 - PyMOvie shows a miss. Strange loss of tracking just before the end, at a minute later, but stepping through the video I see no good reason for loss of tracking and not the double drop to zero of both Ref1 and target for a few seconds. I assume loss of tracking but that was not obvious on playback. At event time, no evidence of an occultation. At 2x I should have had 25 x 0.66 = 8 consecutive drops to zero. I had none.

PyMovie gave an error "duplicate frames detected, CSV cannot be written", so I couldn't run it through PyOTE. But it's a "lone negative" so I won't pursue what happened. Just turn in a "miss" IOTA report.