This is an easy event, RUWE is good at 0.90, Alt is good at 62. Path centerline near Red Realty place on Hwy 17. I propose setting Kirk there, and I'd go north a half mile. Karl could guard for a south shift. Or if he's feeling like it, set up at Garth's and have a better chance on the northern limit.
Alt=60, Az=106 in Gemini
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I dropped off Kirk at the most wind-protected spot we could find, at the old Realty place on Hwy 17. Under the eves of the small office, on the deck. A stiff wind out of the north was a problem for both of us. I decided I had time to get to Mtn Charlie Rd, and down Mtn Charlie to Mtn. Charlie Ranch and the vacant lot entrance. Still, the ice cold wind in the 30's Fahrenheit, was a problem. I had to do the "Batman Maneuver during the event period. It worked, and I got a very solid occultation. I was a little north of the predicted centerline, and Kirk was a little south of the centerline.
magDrop report: percentDrop: 98.8 magDrop: 4.788 +/- 2.264 (0.95 ci)
DNR: 5.28
D time: [05:41:50.8248]
D: 0.6800 containment intervals: {+/- 0.0023} seconds
D: 0.9500 containment intervals: {+/- 0.0057} seconds
D: 0.9973 containment intervals: {+/- 0.0108} seconds
R time: [05:41:51.0664]
R: 0.6800 containment intervals: {+/- 0.0023} seconds
R: 0.9500 containment intervals: {+/- 0.0057} seconds
R: 0.9973 containment intervals: {+/- 0.0108} seconds
Duration (R - D): 0.2415 seconds
Duration: 0.6800 containment intervals: {+/- 0.0034} seconds
Duration: 0.9500 containment intervals: {+/- 0.0075} seconds
Duration: 0.9973 containment intervals: {+/- 0.0132} seconds
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Initial look was that it was a miss. From the roof eves under the old Realty place at the Red Diner place on Hwy 17.
Looks like a miss for me for 1999 RL, 1x at the summit, on the A-frame deck. I know it was close to Rick's chord and he got a positive, but there's no sign of a dip in mine near predicted time. There is a one point upward spike near predicted time, higher than baseline and not part of an event dip, probably just coincidental noise, there was a lot of twinkling. I had some wind gusts at the beginning but it was calmer during the predicted event time. At first I tried all size 2.4 apertures in pymovie, but it lost tracking and didn't recover so I used 3.2 for tracking aperture and then it didn't lose tracking during the recording. I tried dynamic apertures and it lost tracking. Here are annotated graphs, I offset the tracking/reference star vertically for clarity in PyOTE. PyOTE detectability tool reported an event as short as 0.02s would likely be detectable, max predicted was 0.31s.
PyMovie screen capture |
Target light curve, including tracking loss moments |
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The occultation did occur on time, as seen at RN's site nearby. This is KB's light curve zoomed in and confirms a miss at his site. |
Trimming out the tracking loss times (gray). No evidence of an occultation. |
Light curve, ,w/o smoothing the reference star |
Got a solid recording. Kirk was south of my station and had a miss. Karl was south of Kirk's station, and not surprisingly, also saw a miss.
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