The Occultation of a W=12.2 (r=12.2) Star by (157) Dejanira

Sunday eve Dec 1 at 11:10:57pm

OWc page

 

This is a long event at 3.2 sec and so has the promise of satellite hunting and also good resolution of the shape. However, if Karl stays home he'll likely have a miss. Kirk and I are not too far apart in the cross track direction. But that can be an advantage for confirming noisy events or moonlets. The track has both of us well inside.

Alt=51, Az=224 in the SW, just above Alpha Piscium where the fishes meet.

     

 

Results:

Clear dry dark skies arrived, and all 3 of Team Santa Cruz were planning to try it.

Richard Nolthenius

I got a ~1.2s positive obvious on my monitor. Will have to reduce to see more... I observed at 4x from at neighbor's stairs, gamma=1, reduced with horz/vert median filter. There was slight aerosol obscuration in the last half of the tape, but the event is bright, clear, and unaffected. A good reference star very close to the target showed optimum calibration with zero offset in time.

Start: 07:08:55, end: 07:12:16 UT

magDrop report: percentDrop: 90.2 magDrop: 2.519 +/- 0.209 (0.95 ci)

DNR: 5.33

D time: [07:10:56.7068]
D: 0.6800 containment intervals: {+/- 0.0091} seconds
D: 0.9500 containment intervals: {+/- 0.0224} seconds
D: 0.9973 containment intervals: {+/- 0.0422} seconds

R time: [07:10:57.9068]
R: 0.6800 containment intervals: {+/- 0.0091} seconds
R: 0.9500 containment intervals: {+/- 0.0224} seconds
R: 0.9973 containment intervals: {+/- 0.0422} seconds

Duration (R - D): 1.2000 seconds
Duration: 0.6800 containment intervals: {+/- 0.0133} seconds
Duration: 0.9500 containment intervals: {+/- 0.0295} seconds
Duration: 0.9973 containment intervals: {+/- 0.0513} seconds


 

Kirk Bender

 

         

 

Karl von Ahnen