The Occultation of a 13.6 by the asteroid Volga

June 1, 2022 at 1:44:45am

 

This has a lower rank than many but that means getting good timings will improve the orbit. Odds of a "hit" are 50/50 from Santa Cruz and higher for Karl closer to the centerline. The target star is 14.2 and the combined image is 13.6. It's in a dark sky, 28 degrees up due south, so with decent conditions it ought to be do-able, but integration will be necessary.

 

 

Results

Kirk and I both had clear dry skies and got good data on this difficult event. Karl had trouble with the VTI and was not able to observe.

 

Nolthenius Results

I used Google Earth to see if I could observe from home, but the altitude and azimuth were wrong, and while I could get it from the street, there was a bright streetlight in the same direction. And too, I was so close to Kirk it made sense to do a short drive north to better fill in the distance to Derek's site. I found a spot on Mill St near De Laveaga that had a good dark view in that direction and no one came out to bug me; I parked right on the road.

I used 16x, hoping to do 8x as the asteroid and star merged, but it was still too noisy I judged. The light curve says I made a good choice to stay at 16x because there were many 16x integrations that were at 0, but only during the occultation was there a good long period of low points, and good enough to get a solid 0 chance of a false positive. The star was 13.6 combined and the star itself was 14.1 so at 28 degrees altitude that's tough. Dark skies helped, seeing was average. No clouds, dry.

   

PyOTE Log file

 

Kirk Bender Results

Kirk observed from his driveway, at 8x, and visual watching during recording says he got a similar occultation as mine. Nice to see he got 8x to work well.

 

Kirk's PyOTE Log file