OWmap - Kelbaker Rd
This is a good event, high rank, bright, and do-able on our way to the Arecibo main event at 2am. Alt=26 in SW. Duration 0.4s full drop. The time given above is the Kelbaker road time for the event, and is 3s later than the Santa Cruz OW desktop time.
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Site maps; probably best to try to get past Ludlow if the smoke is better farther east as predicted. This event may be smoke-compromised.
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From Hwy 247 south of Barstow. Better smoke forecast. 2h 24m from our sites here to Parker Jct. If we pack up by 10:15pm that's arrival at 12:35am, still 2.5 hrs before Arecibo event. |
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Kirk and I set up on Kelbaker Rd under clear conditions. Smoke not evident at all. A breeze did make for a bit of challenge, but not serious.
I was about a half mile south of I-40 on the east side of the road 192 ft (38.5 5' paces) north of a prominent tree cluster, which itself a similar distance north of a dirt road to the east. I got a solid recording at 2x.
Tracking of PyMovie during the 4 minutes of recording, with 11 px aperture, tracked the target well and did not snap to the bright ref1 star to the right. No saturated pixels in ref1. |
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In Pymovie, zoomed in. No indication of an event, but a single point 1/25s event cannot be ruled out. But there are many such "events" in the light curve, so not significant. |
PyOTE light curves. A possible whiff of smoke came in late after the event time, is my guess, calibrated out very well from the target using ref1. |
In PyOTE, after calibration, and now showing the sky counts (clipped and so centered above zero). A 0.4s event would be 10 consecutive points near zero. The sky level ('no-star') is plotted below the target light curve. Looks like a highly probable miss. A single integration 1/25s event cannot be ruled out, however. |
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Note me in my running shorts... it was still hot, maybe 80F. |
Measuring 31 x 5ft paces from the big tree south of me, to my site, according to my voice on .avi recording on the 2nd event; 2001QH60. This is what Google Earth street view sees, facing east. Compare to the image from the site after the occultation, above. It's a dead-on match to the profile table 2, panel #4 above. |
I counted off 38.5 paces of 5 ft length from the center of the big tree on the wash south of me, to my tripod position. 192.5 ft, giving the long/lat shown on Google Earth |
Looks like a miss for 2000 CT83, 2x from Kelbaker road Friday 13th. Didn't look smoky in the direction of the target, but I normalized on a tracking star. I tried static mask of size 4, and also TME apertures but don't see an event. Max predicted duration was 0.4 sec. PyOTE detectability test says that an event of duration 0.200 seconds with mag drop of predicted 7.3 is likely detectable.
I agree - this looks like a miss, and my station only 1.05 milea due north along Kelbaker Rd (and ~perpendicular to the path) away is also a miss.
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This is yet another event with good rank and high probabilities of a hit from our locations and which instead resulted in misses.
