The Occultation of a 12.0 Star by Hugowolf

Oct 3, 2023 at 5:39am

 

This target star is in the Plieades high overhead. The altitude at occultation time is 67 degrees, but 20 minutes before, it is at 70 degrees. You will need to shove the 8SE scope ALL the way forward to be able to access this high in the sky with the diagonal and eyepiece, and depending on the exact dimensions of your diagonal, it still might not be quite enough. For me on my 8SE, it's do-able. I may have given Karl a slightly bigger diagonal??

Be sure to set up well ahead. And note too that the field will rotate rather strongly during the event and the target finding, in this alt-az telescope. Allow for that in your target-hunting. The Plieades looks like a little dipper, and the target is "under" the handle.

The rank and position gives a 63% chance of a positive "hit" for Karl, but near zero in Santa Cruz. Fog is a possible danger at this time of night

     

Results:

Only Karl tried it - and had a successful positive from his home. About a 1.4 second occultation clearly seen on playback and these reductions done by RN. PyOTE determined the blocksize was 2, so he set it at 4x setting.


magDrop report: percentDrop: 71.7 magDrop: 1.369 +/- 0.324 (0.95 ci)

DNR: 3.78

D time: [12:39:48.6608]
D: 0.6800 containment intervals: {+/- 0.0209} seconds
D: 0.9500 containment intervals: {+/- 0.0540} seconds
D: 0.9973 containment intervals: {+/- 0.1393} seconds

R time: [12:39:50.0971]
R: 0.6800 containment intervals: {+/- 0.0209} seconds
R: 0.9500 containment intervals: {+/- 0.0540} seconds
R: 0.9973 containment intervals: {+/- 0.1393} seconds

Duration (R - D): 1.4363 seconds
Duration: 0.6800 containment intervals: {+/- 0.0324} seconds
Duration: 0.9500 containment intervals: {+/- 0.0758} seconds
Duration: 0.9973 containment intervals: {+/- 0.1744} seconds