The Occultation of a W=13.5 Star by Asteroid 2000 AZ234

Thur Jan 23 at 8:05:48pm

OWc page

This event goes right through Santa Cruz, I am well inside the limit from home. Kirk is near the southern limit and so plans to go to UCSC to try it, along with the 2001FT163 event an hour later

Alt=36, Az=92. in western Cancer.

     

 

 

Results

Richard Nolthenius

Alt/Az; This actually turns out to not quite clear the big palm tree from my carport, so I backed down the driveway and set up almost on the street curb. I had almost decided not to try it, as I was having worrying computer issues. But then, I saw I did have time and Kirk was trying it and deserved to have a second chord submitted - so I rushed madly and didn't even make a webpage, just iPhone photo'd the C2A LCD chart and did a straight GoTo w/o ID'ing the eyepiece field. It worked fine. ID'd start just barely off the initial pointing and got on target with plenty of time. Got a good recording at 8x. Star seen in decent seeing on LCD flip out, main monitor was disconnected. My tightening of the external antenna nuts (which was a pair close to each other but which needed to be tightened in opposite directions, I figured out) may have been the trick that got satellite acquisition easily this time. No more troubles

I observed a short positive occultation, which passed the new criterion of separation=2.0 between with and without event in the light curve point distributons. The event was 1.5s late, which is fully 2 asteroid diameters late.

magDrop report: percentDrop: 86.8 magDrop: 2.196 +/- 2.160 (0.95 ci)

DNR: 2.81

D time: [04:06:49.4085]
D: 0.6800 containment intervals: {+/- 0.0533} seconds
D: 0.9500 containment intervals: {+/- 0.1431} seconds
D: 0.9973 containment intervals: {+/- 0.3882} seconds

R time: [04:06:49.8885]
R: 0.6800 containment intervals: {+/- 0.0533} seconds
R: 0.9500 containment intervals: {+/- 0.1431} seconds
R: 0.9973 containment intervals: {+/- 0.3882} seconds

Duration (R - D): 0.4800 seconds
Duration: 0.6800 containment intervals: {+/- 0.0819} seconds
Duration: 0.9500 containment intervals: {+/- 0.1966} seconds
Duration: 0.9973 containment intervals: {+/- 0.4321} seconds

     


 

Kirk Bender

I don't see an event for 2000 AZ234, 16x at the UCSC hay barn Jan 23. This is for aperture size 2.4, I tried other sizes also, but nothing convincing. Max predicted duration was 0.65 sec, PyOTE detectability reported an event as short as 0.55 sec would likely be detectable, so a miss or too short for my data.