The Occultation of a 10.7 Star by 2004 JM17

Fri eve Feb 7, 2025 at 10:30:45pm

OWc page

 

This event is just 7 minutes after the Ispahan event, and Cabrillo College is inside both paths. Alt=81, Az=w. Will require the 2" diagonal and 0.5x reducer, and fast acquisition of this target. It's bright, and event lasts 0.7s. Kirk Bender will go to Capitola to try both, to get separate chord than mine. Sandy is not available, and both paths are too far south for Karl.

It's only 15 deg from the 80% moon, unfortunately. And so getting on target might be tough. 7 minutes to accomplish this. That'll be tight.

     

 

Results:

I set up at Hort Hill at Cabrillo College. ID'd and got on target with plenty of time. Then spent time trying to GoTo the 2004JM17 event which would be 7 minutes later than Ispahan. But very frustrating and unable to ID any of the stars.... spent too much time, unwilling to give up, that I then didn't have enough time to return to the Ispahan field, and so I missed both events. I'm miffed!

Kirk Bender

A miss, I don't see an event for 2004 JM17,  2x from the Capitola Nob Hill parking lot, Feb.7. This was high altitude, I used the diagonal and 0.5x reducer. There are a couple of bad time stamps, but they occur well after the predicted time. In the PyMovie composite graph, you'll see a deep drop in the middle of the red curve, but it is a tracking star away from the target, only one integration, and occurs 7 seconds after the predicted time. Max predicted duration was 0.71 sec at 8.9 mag drop.  PyOTE detectability tool reports that an event as short as 0.04 sec would be detectable.