RE: Observing the MAST Tether, H-A Error

From: David Anderman (davida@cwo.com)
Date: Wed Apr 25 2007 - 12:32:18 EDT

  • Next message: John Locker: "Re: Observing the MAST Tether"

    Perhaps I am missing something, but this object is basically in a sun 
    synchronous orbit, so it is going to appear at the same local time on 
    every pass.
    
    DWA
    
    
    At 09:06 AM 4/25/2007, Brad Young wrote:
    >I think actually the object is egressing from Earth's shadow at every pass,
    >which makes sense given the northern hemisphere's summer shadow geometry.
    >This happens at "max altitude" because it isn't visible until that point.
    >
    >Correct me if I missed something, Chris.
    >
    >Brad Young
    >TULSA 1
    >COSPAR 8336
    >36.1397N, 95.9838W, 205m ASL
    >
    >-----Original Message-----
    >From: Art Glick [mailto:omb00900@mail.wvnet.edu]
    >Sent: Wednesday, April 25, 2007 10:50 AM
    >To: SeeSat-D@satobs.org
    >Subject: Re: Observing the MAST Tether, H-A Error
    >
    >
    >This can't be correct...
    >
    > >MAST's orbit is well placed for evening observation at latitudes
    > >north of about
    > >40 N. Heavens-Above has elements.
    >
    >...if you look at H-A's chart at...
    >
    >http://www.heavens-above.com/passsummary.asp?lat=37.802&lng=-80.446&alt=639&
    >loc=Lewisburg&TZ=EST&satid=31126
    >
    >(for my winter viewing location in Lewisburg WV)
    >
    >The "Starts" column is identical to the "Max Altitude" column,
    >suggesting that the object comes out of eclipse at culmination for
    >each and every apparition, regardless of the time of day or position
    >of the sun.
    >
    >That just can't be, can it?  What gives Chris?
    >
    >
    >
    >
    >Almost Heaven Group
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