The Occultation of a W=14.1 Star by Asteroid 2001 QA69

Jan 21 Tue 11:44:30pm

OWc page

This event is another coast grazer, only decent odds nearby is along the Santa Cruz West cliff area. Kirk's just inside the northern limit. I will drive to my familiar site at the foot of Natural Bridges Dr where it meets the end of West Cliff. The duration is 1.0s and altitude is 67 degreees at event time. This is low enough to enable the standard f/3.3 configuration. However, 20 min before the event the altitude will be 69 degrees - still safe.

Alt=67, Az=223 in the SW.  in Gemini halfway between Gemini's feet.

     

 

Results:

My site at the foot of Natural Bridges Rd has a nominal odds of a hit = 96%. Kirk will try from the entrance to the marine lab, with odds 90%

Richard Nolthenius

My electrical connection via my 6V connectors to the VTI and monitor, had a fail from which I could not recover. I got on target, but too faint to monitor by eye. No data

Kirk Bender

I got a 0.5338 sec positive on 2001 QA96, Jan 21, 16x by the marine lab entrance. It's only 3 integrations, but well passes the false positive test.


magDrop report: percentDrop: 66.1  magDrop: 1.174  +/- 0.024  (0.95 ci)

DNR: 2.89

D time: [07:44:30.9329]
D: 0.6800 containment intervals:  {+/- 0.0409} seconds
D: 0.9500 containment intervals:  {+/- 0.1049} seconds
D: 0.9973 containment intervals:  {+/- 0.2032} seconds

R time: [07:44:31.4667]
R: 0.6800 containment intervals:  {+/- 0.0409} seconds
R: 0.9500 containment intervals:  {+/- 0.1049} seconds
R: 0.9973 containment intervals:  {+/- 0.2032} seconds

Duration (R - D): 0.5338 seconds
Duration: 0.6800 containment intervals:  {+/- 0.0604} seconds
Duration: 0.9500 containment intervals:  {+/- 0.1386} seconds
Duration: 0.9973 containment intervals:  {+/- 0.2395} seconds