Re: 3 un known objects

From: Björn Gimle (bjorn.gimle@gmail.com)
Date: Thu Jan 26 2012 - 08:34:13 UTC

  • Next message: Russell Eberst: "2012JAN25-26.OBS"

    Hi Manmeet,
    
    All operating civilian satellites are very close to latitude 0, so their
    declination is about 1/6 of the observer latitude at all times, dates and
    (almost) azimuth. (Slightly less in the ESE or WSW).
    There are some military satellites operating at 5-10 degrees declination,
    to make tracking/listening more difficult (?)
    
    The satellites occupy most of the circumference of the Earth, but there are
    concentrations and (almost) gaps, so in some areas it is possible to select
    a better hour/date combination to have the object in such a gap.
    
    Non-operational geostationaries usually are put drifting slowly, and
    inclination will oscillate considerably over dozens of years.
    
    The best technique is to stack many short exposures, and discard those with
    tracks.
    
    /Björn
    
    2012/1/26 manmeet virdi <manmeetvirdi@hotmail.com>
    
    >  Hi Everybody,
    > ...
    >
    
    
    > Q)Will Mr Elahi will ever have scratch free Orion nebula?
    >
    > A) At that latitude and at that time (approx) of the year never. Right? So
    > if Iam also in same latitude as Mr Elahi is then I too can have scratch
    > filled Orion nebula.
    > Also at least that region of the sky (alt,az) will never go scratch less
    > because those satellites are in line of sight. Please confirm :-)
    > --
    >
    ----------------------------------------
    Björn Gimle, COSPAR 5919
    59.2576 N, 18.6172 E, 23 m
    Phone: +46 (0)8 571 43 312
    Mobile: +46 (0) 704 385 486
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