The Occultation of a W=13.4 Star by 1999 TZ91

Dec 1, 2023 at 2:45am

 

This is a low rank difficult event, but it's high in the sky so minimizing extinction. There's a gibbous moon which will brighten the sky. The real problem in trying to get this, is that a full occultation only lasts 0.6s, so it'll take a short integration to get enough points to verify it happened. Any compromise on the sky and you'll probably not get clean enough data to pass the FP test. It'll help if those tring the more likely event 25 minutes later, try this one first so if anyone does get it, the other observers can help confirm the event. It's not far from M35 in Gemini. You'll need to use the 2" diagonal and 0.5x reducer. I've flipped and rotated the LCD chart so the Watec orientation inserted into the eyepiece can be like normal, with the BNC video connector on the "down" and right side as you look at the back, as we do for the straight-through orientation

 

     

 

Results:

Kirk and I both got up to try this one, but clouds came and instead we just set up to try for the second event; 1998BL1 25 minutes later. Passing cloud holes allowed me to get set up and on target, but a large cloud ruined the occultation itself. No one got data on this one, or the 1998 BL1 event.