RE: Obs 2004 Jun 13/14

From: Ted Molczan (molczan@rogers.com)
Date: Mon Jun 14 2004 - 07:50:56 EDT

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    Kent Yeglin wrote:
    
    > I'm not entirely satisfied with the resolution I was able to 
    > achieve in the 24680 obs below... just too much light 
    > pollution to get good points using fainter (mag. 7) stars, so 
    > I had to settle for more widely-spaced brighter ones.
    
    Your results seem pretty good nevertheless, and within your estimated accuracy. 
    
    
    > I was reluctant to post the 90019 obs of Sunday a.m., as I 
    > "lost" the reference stars during my immediate 
    > post-observation review of the pass for memory-refreshing 
    > purposes -- pretty rusty in the Capricorn/Aquarius part of 
    > the sky. 
    
    One of my problem areas too.
    
    
    > ObsReduce had my reference stars centered in the FOV 
    > at the proper times and, using the miss distances estimated 
    > "at the eyepiece," gave sufficiently low X-track and time 
    > differences (consistent with my accuracy level) that the 
    > reference stars are almost certainly correct.
    
    That is an excellent use of the program, which is designed to facilitate
    obtaining many points per pass, with no need to sketch reference stars, as
    discussed in the manual:
    
    http://www.satobs.org/programs/ObsReduce/ReadMe.html#C.3
    
    
    > Had a very fast moving as-yet-unid (about mag. 3.5) cross the 
    > FOV during the 90019 pass at 11:22:56 UTC on an approximate 
    > 110-degree azimuth heading. Perhaps an object in an 
    > eccentric, mid-inclination orbit near perigee?
    
    I suspect so, and 72023E / 6073 appears to be a good candidate:
    
    Cosmos 482 (E)   0.0  0.0  0.0  6.5 v 1.09
    1 06073U 72023E   04165.53568927  .00012910  23798-5  11229-3 0  8490
    2 06073  52.0708 165.7682 2454511 151.0374 225.2339 10.64181795815325
    
    Its angular separation from 03790B was less than 7 deg (the nominal FOV of 7x50
    binocs) from 11:22:28 to 11:22:50 UTC. If you remained centred on 03790B during
    this time, then 72023E would have been within your FOV from 11:22:39 to 11:22:44
    UTC. It would have entered your FOV at nearly the 1 o'clock position. Its
    angular velocity was about 1 deg/s, and its predicted magnitude was 4.1 +/- 1,
    in excellent agreement with your description.
    
    By the time you reported, 11:22:56 UTC, the objects were 9.8 deg apart, and no
    longer in the same FOV, so if that time is exact, then 72023E would have to be
    excluded. I found no other good candidates.
    
    Ted Molczan
    
    
    
    
    
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