OFEQ 10 Third Point

From: Brad Young via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 13 Apr 2014 13:20:15 -0700 (PDT)
Yahoo has made replying and snipping impossible, so I started a new thread.

Ted said:

> Using the estimated TLE I posted Saturday, I found an asterism similar to the 
> one that you reduced to obtain your third
> point, but about 10 s further along-track. I am not certain of the geometry you 
> used in your reduction, but it appears
> to have been an appulse; applying approximately the same position angle and 
> angular miss-distance to what I believe was
> most likely the correct star, yields the third position below:
> 39650 14 019A  8336 F 20140412021354430 17 25 1334793+551697 48 S
> 39650 14 019A  8336 F 20140412021402340 17 25 1307069+620478 18 S
> 39650 14 019A  8336 G 20140412021441860 17 25 0619031+725444 48 S

This is probably safe. I had noted 55% on a line that matches well your star field you chose and what I remembered the field to be. Unfortunately, I had been sweeping, requiring the azimuth lock off on my tripod. It tends to drift when spun a large angle like this, so that by the time I came back to sketch the star field, it may very well have drifted. I am sure of the first point, as it passed by Mizar and well known "path to M101" stars, and 99% sure of next point, when it split a brightish pair.

I just feel lucky to have finally caught one first after 11 years of trying (ORS-1 r/b also, but we won't mention that :o). Visual astronomy is not quite dead, after all.
Brad Young
Bright:20 x 80 Garrett binoculars fluid pan head tripod 
Dim:22" f/4.2 UC Obsession @ 100x.
Numbers above and methods explained at:
+36.139208,-95.983429 660ft, 201m
+35.8311  -96.1411 1083ft, 330m

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Received on Sun Apr 13 2014 - 15:21:15 UTC

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