This is a high rank event by a named asteroid and a bright star high in the sky and lasting 2.5s, so it looks like it has good potential for discovering moons, and for mapping the shape well. I plan to observe this from the Mtn Charlie Monument off Hwy 17/Summit Rd, north of Karl's track and also north of Kirk's track. Not aware of other observers at this time. Skies look good!
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All 3 of our team; Kirk, Karl, and I, got good recordings of the occultation. I was at the Mtn Charlie monument at the top of Mtn Charlie Rd and Summit Rd. Karl was at home I believe
I set up on the edge of Mtn Charlie Rd at the parking area of the monument. I had a good view to the SE and the target, high in the SE. There was no wind and no light interference. The star was so bright, I used 1x setting in hopes it might help show any moonlets that were short in duration.
Start: 9:29:56UT
End: 9:33:30 UT
magDrop report: percentDrop: 93.8 magDrop: 3.023 +/- 0.496 (0.95 ci)
DNR: 3.76
D time: [09:31:18.0716]
D: 0.6800 containment intervals: {+/- 0.0052} seconds
D: 0.9500 containment intervals: {+/- 0.0133} seconds
D: 0.9973 containment intervals: {+/- 0.0262} seconds
R time: [09:31:20.9729]
R: 0.6800 containment intervals: {+/- 0.0052} seconds
R: 0.9500 containment intervals: {+/- 0.0133} seconds
R: 0.9973 containment intervals: {+/- 0.0262} seconds
Duration (R - D): 2.9013 seconds
Duration: 0.6800 containment intervals: {+/- 0.0077} seconds
Duration: 0.9500 containment intervals: {+/- 0.0170} seconds
Duration: 0.9973 containment intervals: {+/- 0.0333} seconds
I searched for hints of any secondary occultations. There were 3 drops to ~0 but they were single point drops, meaning duration was only 1/50th second, and they didn't stand out as unusual from a noise point of view. I don't see any events that look suspiciously like moonlet events, but if Karl or Kirk see something, having this time resolution may be valuable.
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Target was still bright even at 1x setting. Clean clear skies at my 1800 ft elevation site. |
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PyMovie target light curve |
The full recording; by analyzing in field mode, the software inserts a new vertical orange line to show the odd numbered field data. |
Zoomed in on the D |
Zoomed in on the R |
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magDrop report: percentDrop: 84.7 magDrop: 2.041 +/- 0.403 (0.95 ci)
DNR: 3.86
D time: [09:31:23.6112]
D: 0.6800 containment intervals: {+/- 0.0084} seconds
D: 0.9500 containment intervals: {+/- 0.0210} seconds
D: 0.9973 containment intervals: {+/- 0.0426} seconds
R time: [09:31:24.6278]
R: 0.6800 containment intervals: {+/- 0.0084} seconds
R: 0.9500 containment intervals: {+/- 0.0210} seconds
R: 0.9973 containment intervals: {+/- 0.0426} seconds
Duration (R - D): 1.0166 seconds
Duration: 0.6800 containment intervals: {+/- 0.0125} seconds
Duration: 0.9500 containment intervals: {+/- 0.0284} seconds
Duration: 0.9973 containment intervals: {+/- 0.0581} seconds
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