The Occultation of a W=10.6 Star by 1999 XA101

Sun eve June 28, 2026 at 10:58:20pm for 0.33s

OWc page

 

This is a good event, wide path centered on Santa Cruz. I will try from home, praying for no fog. The one problem is that it is only 8 deg from the full moon, so ID'ing the target will be tough. Go for low integrations. 2x max I'd say.

Alt=21 az=147 in Sagittarius

It's near the 9th mag globular cluster NGC 6638 which is bright enough to show well on the Watec. It may be the easier way to navigate to the target.

     

 

Results

 

Richard Nolthenius

could not ID the target area. Recorded, not studied yet.

Kirk Bender

I don't see an event for 1999 XA101, 1x from home, June 28. The full Moon was only 8 degrees from the target and the background was bright, the target was barely above background but I could still ID it. PyOTE doesn't show a dip that stands out from the noise at predicted event time.  There's a 1 point drop near event time, but there are a lot of other 1 point drops nearby as deep or deeper. I tried different size masks in PyMovie. PyOTE detectability tool reports an event as short as 0.160s would likely be detected, max predicted was 0.33s. I was not near the centerline, so it's possible there was an event too short to detect, or it was a miss.

KB's email has his graphs, not added here yet.