Re: unidentified object

From: tom (loeblt@gmail.com)
Date: Sat Jun 23 2012 - 21:13:37 UTC

  • Next message: Björn Gimle: "Fwd: unidentified object"

    My location is 41 degrees 36 minutes north, 71 degrees 6 minutes west.
    
    > ----- Original Message ----- 
    > From: "Björn Gimle" <bjorn.gimle@gmail.com>
    > To: "tom" <loeblt@gmail.com>
    > Cc: <seesat-l@satobs.org>
    > Sent: Saturday, June 23, 2012 3:43 PM
    > Subject: Re: unidentified object
    >
    >
    > There are about 20 objects in 46 degree inclinations with more or less
    > eccentic orbits, mainly russian rockets and parts. Theoretically, one
    > of them could move through perigee at ~90 km height at some 250 km
    > range, and >10 km/s, more or less W to E.
    >
    > That gives slightly more than two degrees/s
    >
    > What is your longitude, and more accurate latitude ?
    >
    > /Björn
    >
    > 2012/6/23 tom <loeblt@gmail.com>:
    >> Hi,
    >> I have no background in serious satellite tracking but have seen hundreds 
    >> of them during my nights out with my telescope imaging sessions and I can 
    >> tell the difference from a plane or meteor. I was preparing to do some 
    >> imaging of the near-earth asteroid 2012 LZ1 on the evening of June 17th 
    >> during late twilight. I saw a naked-eye object moving more or less west 
    >> to east, north of my zenith, passing perhaps 10 degrees south of Polaris 
    >> (I am at 41 degrees north latitude) at around 0120 Z. It was probably 
    >> between mag 0 and -1, brighter than Vega. I initially thought it might 
    >> have been the ISS but the object was moving faster than I have ever seen 
    >> a satellite move, probably 2-3 degrees per second. I lost it about 20 
    >> degrees above the eastern horizon due to the local tree line. What sort 
    >> of relative velocity would an object in orbit move if it was at the 
    >> lowest possible orbit before burning up?
    >>
    >> Tom
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    >
    >
    > -- 
    > ----------------------------------------
    > 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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