The Occultation of a W=12.9 very red B-V=2.1 Star by (11282) Hanakusa

Fri eve July 31, 2026 at 10:00:32pm

OWc page

 

This is a faint event, with V=13.5 but W=12.9, and it lasts a full 1.6 seconds. Kirk and I are well placed at home for it. Karl would have to drive down to Blue Balls Park to get inside the shadow.  RUWE=0.75 which is good. The rank looks good so odds of a positve are high

Alt=25, Az=171 in Sagittarius, 4 deg above the tip of the spout

larger chip view    

 

Results:

Kirk got a recording from home at 32x. I got one at 16x from Rincon St. Neither of us know if we had the target visible but I'm dead sure I was on target. Seeing was terrible for me. Was I looking over a neighbor's chimney which was actually in use? Why, in July would they fire up their chimney? Or maybe the roof itself was just hot? Don't know....

I got a 1 sec event for Hanakusa, 32x at home  July 31. I ID'd the field but it was crowded and I wasn't sure I picked out the target but I did, event is obvious, about 1 sec after predicted time of 5:00:32. In PyMovie I used a small size 11 aperture because the field was crowded and got the best results with a size 2.4 mask.

NIE sigma distance = 30.6
magDrop report: percentDrop: 100.0  (magDrop cannot be calculated because A is negative)

DNR: 4.10

D time: [05:00:33.1838]
D: 0.6800 containment intervals:  {+/- 0.0604} seconds
D: 0.9500 containment intervals:  {+/- 0.1640} seconds
D: 0.9973 containment intervals:  {+/- 0.3080} seconds

R time: [05:00:34.2515]
R: 0.6800 containment intervals:  {+/- 0.0604} seconds
R: 0.9500 containment intervals:  {+/- 0.1640} seconds
R: 0.9973 containment intervals:  {+/- 0.3080} seconds

Duration (R - D): 1.0677 seconds
Duration: 0.6800 containment intervals:  {+/- 0.0913} seconds
Duration: 0.9500 containment intervals:  {+/- 0.2085} seconds
Duration: 0.9973 containment intervals:  {+/- 0.3615} seconds