Re: Orange ISS !

From: Robert Holdsworth (robbonz1@xtra.co.nz)
Date: Thu Oct 26 2006 - 13:21:28 EDT

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    I have also noticed an orange tinge shortly after the new trusses were
    installed.  Unfortunately I don't have a record of the observation.
    
    As we  have  a large number of passes in November we may have ample 
    opportunity to observe this phenomenon.  I say "may" because weather 
    conditions are often cloudy here at this time of year.
    
    If I am able to observe them, in order to avoid flooding the list  the most 
    practicable way to report these appears to be for me to use the Heavens 
    Above facility to report them and only put occasional summaries in here 
    unless there is anything of particular significance to report on an 
    individual observation.  I will be happy to exchange individual emails on 
    observing this phenomenon with any who wish to do so.
    
    As I understand it the intention is for the panels to be rotated as required 
    to receive the
    maximum available solar energy, it will be interesting to  observe the 
    effects once this is implemented.
    
    Robert Holdsworth
    Wainuiomata
    New Zealand
    174.948E
    41.261S
    
    
    ----- Original Message ----- 
    From: "Robert" <rsmath@yahoo.com>
    To: <SeeSat-L@satobs.org>
    Sent: Wednesday, October 25, 2006 10:43 PM
    Subject: Re: Orange ISS !
    
    
    > what kind of pass was it?  In rough terms, was the sun generally to your
    > back with the ISS in front of you (or did the ISS pass happen between you
    > and the sun?)
    >
    > From passes before the second pair of solar arrays were added, I've seen
    > it be a goldish or orangish color when it passes between me and the sun.
    > When the ISS passes with the sun at my back, it's brighter and whiter.
    >
    > I am currently trying to figure out pass quality since the new solar array
    > was added.  So far, I've concluded altitude of the pass plays more of a
    > part than the general direction of the sun with regard to the observer.
    > In about 5 pass checks, the ISS is brighter when above 30 degs above the
    > horizon and dimmer when below 30 degrees elevation.  I'm still adding to
    > my knowledge base by watching passes when I can, but I've pretty much
    > concluded if the pass is less than 30 deg elevation, it won't be a
    > spectacular one if it is entirely or mostly below 30 deg elevation.
    >
    > my most memorable recent pass was a morning pass with the ISS coming out
    > of shadow overhead (and fairly immediately becoming as bright as Venus)
    > and then at about the 30 deg elevation mark on its way towards my horizon,
    > it rapidly faded in magnitude.  The ISS turned from a white, bright color
    > (venus-type magnitude) to a goldish color (as it faded to probably -1 or 0
    > magnitude).
    >
    > Robert
    >
    > ----- Original Message ----
    > From: John Locker <john@satcom.freeserve.co.uk>
    > To> Subject: Orange ISS !
    >
    > Watching ISS tonight on a low elevation pass ( 37 degs .... 1828 gmt ) I
    > was
    > amazed how orange it was ...and how bright .
    > Quick glimpse here :
    > http://mysite.wanadoo-members.co.uk/satcom_transits/long.gif  at long
    > range
    > .
    >
    > John
    
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