The Occultation of a W=13.2 Star by Asteroid (5922) Shouichi

Sat eve Feb 15, 2025 at 7:57:57pm

OWc page

 

This is a long event, bright enough to get well at 4x or perhaps 8x, and lasts 4.7 seconds. Sandy, Kirk, and I are all well within the path. Karl would have to drive down to Castelegno's to be comfortably south of the northern limit.

Alt=59, Az=134 in Gemini, 1/3 of the way from Alhena (Gamma Gem) to Procyon

     

 

Results:

Richard Nolthenius

Got recording. Visually it looked like a positive on the monitor. At my carport. 8x setting.

start 3:55:46 UT
end: 4:00:24

magDrop report: percentDrop: 86.3 magDrop: 2.155 +/- 0.589 (0.95 ci)

DNR: 3.09

D time: [03:57:57.1741]
D: 0.6800 containment intervals: {+/- 0.0497} seconds
D: 0.9500 containment intervals: {+/- 0.1327} seconds
D: 0.9973 containment intervals: {+/- 0.3406} seconds

R time: [03:58:01.1741]
R: 0.6800 containment intervals: {+/- 0.0497} seconds
R: 0.9500 containment intervals: {+/- 0.1327} seconds
R: 0.9973 containment intervals: {+/- 0.3406} seconds

Duration (R - D): 4.0000 seconds
Duration: 0.6800 containment intervals: {+/- 0.0763} seconds
Duration: 0.9500 containment intervals: {+/- 0.1773} seconds
Duration: 0.9973 containment intervals: {+/- 0.3616} seconds

From examining the PyOTE light curve, the pattern is for the D moment is shown visually as a drop vertically, and the time given in the log file is the time for 1 integration later. The R rise line is placed at the point the light resumes full brightness or close to it. Again, the R time in the log file corresponds to the time stamp one dot later than the vertical rise line R.


         

 

Kirk Bender

I got a 4 sec. obvious positive for Shouichi, Sat. Feb. 15, 4x on Swanton blvd by the Natural Bridges entrance.

magDrop report: percentDrop: 79.1  magDrop: 1.700  +/- 0.482  (0.95 ci)

DNR: 1.74

D time: [03:57:57.1738]
D: 0.6800 containment intervals:  {+/- 0.0508} seconds
D: 0.9500 containment intervals:  {+/- 0.1847} seconds
D: 0.9973 containment intervals:  {+/- 0.4558} seconds

R time: [03:58:01.1110]
R: 0.6800 containment intervals:  {+/- 0.0508} seconds
R: 0.9500 containment intervals:  {+/- 0.1847} seconds
R: 0.9973 containment intervals:  {+/- 0.4558} seconds

Duration (R - D): 3.9372 seconds
Duration: 0.6800 containment intervals:  {+/- 0.0902} seconds
Duration: 0.9500 containment intervals:  {+/- 0.2608} seconds
Duration: 0.9973 containment intervals:  {+/- 0.5634} seconds