RE: annular eclipse october 3rd madrid/ attention: javi el zaragozano

From: Fco. Javier Iruretagoyena (javiru@able.es)
Date: Sun Sep 25 2005 - 04:37:31 EDT

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    Hello everybody,
    
    This is an event very hoped and my group of astronomy is going to Madrid to
    make the observation of the eclipse. We have many curiosities because,
    because it is not a total eclipse, we do not know what magnitude will have
    obscuration of the surroundings and if it is possible to see some of the
    most shining stars, planets and of course this includes LEO objects.
    
    will the sky darken enough at the peak of the event to allow for naked-eye
    observations of LEO objects? <-- That is the great question. I  am enough
    skeptic and I don't believe that it is going to be possible. I don't believe
    that we see more of Sirius or Mars. Simullation with the Starry Night
    doesn't give rise to great hopes.
    
    If any of you have experience with this kind of event, please advice me and
    tell me the experience.
    
    Javi
    Zaragoza, Spain
    
    
    
    -----Mensaje original-----
    De: Stephan Szyman [mailto:szymanss@hotmail.com] 
    Enviado el: domingo, 25 de septiembre de 2005 7:58
    Para: SeeSat-L@satobs.org
    Asunto: annular eclipse october 3rd madrid/ attention: javi el zaragozano
    
    hello everybody,
    
    on 3 oct there will be an annular eclipse for central spain at 08:58 UT,
    details about which can be found in this sky and telescope article:
    
    http://skyandtelescope.com/observing/objects/eclipses/article_1593_1.asp
    
    I have friends in madrid who are keen on observing the event.  I read the
    recent discussion (18 sept) between russell eberst, daniel deak,  and
    gerhard holtkamp, and I have the following questions:
    
    will the sky darken enough at the peak of the event to allow for naked-eye
    observations of LEO objects?
    
    how can I get predictions for if and when such objects might be visible?  
    using starry night pro (which doesn't list too many LEO objects) for
    example, I notice iridium 7 is in the area at the time of the peak.  will it
    be obscured by the umbra for the entire time it's in line-of-sight with
    madrid?
    
    I notice also, using the amateur radio predictions from HA,  that the mother
    of all bright sats,  the ISS,  unfortunately won't be making a pass at the
    time of the peak.
    
    is there any way to tweak HA or Calsky in order to show any illuminated LEO
    objects which might be visible from madrid at the time of the peak?
    
    if not,  would someone kindly kick me a list of predictions?  ( I noticed
    mr. holtkamp has offered to do so for geostationary objects.)
    
    I suppose if I got really ambitious I could fire up my STK software and use
    data from calsky,  but I'm fairly slow at that type of thing and probably
    would commit a fundamental error somewhere.  I hope one of you veterans can
    whip this problem with more ease.
    
    it's likely these observations will prove impossible from my friend sara's
    office (one block south of estadio santiago bernabeu,  40.4504N, 3.6877W )
    because these objects will obviously be in the shadow when overhead, and
    also viewing would be complicated by the high buildings and air
    contamination in that part of the city.
    
    mr. iruretagoyena , should you read this,  if you are in zaragoza at the
    time of the event, I'd sure appreciate an account from you.
    
    clear skies!
    
    stephan szyman
    chicago IL USA
    41.6840N, 87.7000W; 188 msl
    
    
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