Iridium Flare predictions limitation or bug?

From: Starparty (
Date: Sat Jan 15 2000 - 17:05:17 PST

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    I checked Chris Peat's Iridium Flare predictions page this morning and my
    location did have a prediction for this evening. About 15 minutes before the
    predicted pass, I got back on that page to double check the details of the
    pass. The prediction no longer showed in the list for my location.
    Thankfully I had the detail page from this morning in my browser's history
    list and I went to that page and I got the details and decided to try to
    view it anyway. I'm very glad I did... the pass was indeed visible as had
    been predicted earlier and it was the -8 magnitude that was expected... what
    a sight!
    Here's my question. Why did the pass prediction disappear? I originally
    thought it might be the result of an updated elset, but the pass did occur
    exactly as predicted. Does the prediction software used for this site have a
    "blind spot" for passes in the very near and very recent terms? I verified
    that the search parameters did include the moment of the pass for both the
    next 24 hours and past 48 hours links. The detail page still shows the
    proper information even when I made sure it wasn't cached locally. Does
    anyone know if the disappearing pass prediction problem is a bug or just a
    limitation of the prediction code? I'd really like to find out since I have
    decided not to view passes in the past due to their no longer being listed
    moments before the predicted time.
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