This event is a wide path nicely including Santa Cruz. The northern limit crosses Dorrington and site for the Astro 25 trip, and we'll be barely inside the northern limit at our campsite at WakaLu Hep Yo. The max duration is 5.8s, but for me at the Stanislaus River it'll be much shorter. For Santa Cruz probably about 2 seconds. The dark clean skies (we hope) may make it easier to use a short integration and get a good decision on whether we are at a hit or miss. Karl can get this from home and help define the path.
This asteroid is a known binary. I don't know where the moon path is as I write this on Oct 1. The drop in brightness will be about 0.9 magnitudes and should be easy to see visually and record.
Alt=15.6, Az=219 from Santa Cruz. In the SW in Ophiuchus. That might still be above the ridge across from the Stanislaus river.
The target will be above the horizon, which in that direction is near 0, down-river. But local trees at the "telescope campsite" will require me to migrate down hill a bit to avoid those immediate trees.
|
|
I recorded successively at 8x from the entrance to WakaLu Hep Yo campground, just up from Board Crossing Road. I used the predicted Az and my compass app to decide the compass app on my iPhone was giving true Azimuth and not magnetic azimuth, and indeed the target was between two tall pine trees and I got the recording. I don't know yet if I had a positive event.
I got a shallow 3.2s event for Hermione, 8x from home, Oct. 16. Predicted max was 5.84s, but the wikipedia page for Hermione says the shape is irregular, and Yanzhe reports an event of 3.8s.
I found a small mask size of 2.0 in PyMovie gave the best sigma results.
PyOTE NIE sigma distance = 5.0
magDrop report: percentDrop: 39.9 magDrop: 0.553 +/- 0.159 (0.95 ci)
DNR: 1.25
D time: [02:34:07.5511]
D: 0.6800 containment intervals: {+/- 0.1833} seconds
D: 0.9500 containment intervals: {+/- 0.6537} seconds
D: 0.9973 containment intervals: {+/- 1.5002} seconds
R time: [02:34:10.7543]
R: 0.6800 containment intervals: {+/- 0.1833} seconds
R: 0.9500 containment intervals: {+/- 0.6537} seconds
R: 0.9973 containment intervals: {+/- 1.5002} seconds
Duration (R - D): 3.2032 seconds
Duration: 0.6800 containment intervals: {+/- 0.2758} seconds
Duration: 0.9500 containment intervals: {+/- 0.7921} seconds
Duration: 0.9973 containment intervals: {+/- 1.7971} seconds
 |
 |
 |
 |
 |
 |
Karl skipped this one.