The Occultation of a W=13.0 Star by Asteroid 2001 FT163

Thur Jan 23, 2025 at 9:13:28pm

OWc page

This event is of mediocre rank. To get good odds, I'll need to get closer to the centerline. I'm on the southern limit, at home. I will plan to go to the Ocean St Extension site at the cemetery, as I did earlier this month for another event.

Alt=74, Az=117. in Auriga. This is dangerously close to the limit for using the f/3.3 set up. But, it's rising, so you can shut down right after the event and prevent damage. A slight tilt of the base in the right direction may still allow good pointing. Try 4x if you can. 0.6s duration isn't much time

         

 

Results

Richard Nolthenius

I set up on Ocean Street Extension, at an orchard about 1/2 mile past the cemetery, to avoid the overhead power lines. Got set up and aligned OK, but the scope would not point to 74 deg altitude accurately. I never ID'd the star field, despite plenty of time to search using the Watec in f/3.3 mode. I noted, however, that the 74 degree altitude was OK, and even 76 degrees or perhaps 77 degrees would have been OK not hitting the base.

No data from me (and no site photos either)

 

Kirk Bender

Observed from hay barn at UCSC. Occultation was much longer than predicted 0.56s max duration.

magDrop report: percentDrop: 46.3  magDrop: 0.674  +/- 0.383  (0.95 ci)

DNR: 2.01

D time: [05:13:28.7296]
D: 0.6800 containment intervals:  {+/- 0.1671} seconds
D: 0.9500 containment intervals:  {+/- 0.5854} seconds
D: 0.9973 containment intervals:  {+/- 1.4432} seconds

R time: [05:13:30.0643]
R: 0.6800 containment intervals:  {+/- 0.1671} seconds
R: 0.9500 containment intervals:  {+/- 0.5854} seconds
R: 0.9973 containment intervals:  {+/- 1.4432} seconds

Duration (R - D): 1.3347 seconds
Duration: 0.6800 containment intervals:  {+/- 0.2863} seconds
Duration: 0.9500 containment intervals:  {+/- 0.8173} seconds
Duration: 0.9973 containment intervals:  {+/- 1.7704} seconds