ROSAT pass from Leiden (Re: ROSAT: evolution of predicted decay v1)

From: Marco Langbroek (marco.langbroek@wanadoo.nl)
Date: Thu Oct 13 2011 - 19:22:37 UTC

  • Next message: Thierry Legault: "Re: ROSAT pass from Leiden (Re: ROSAT: evolution of predicted decay v1)"

    Op 13-10-2011 17:30, Ted Molczan schreef:
    > I have used Satevo 0.51 to propagate the past 12 days of USSTRATCOM's TLEs of ROSAT (1990-049A / 20638) to decay, and
    > plotted the results on the same type of graph that I used last month for UARS (1991-063B / 21701):
    >
    > http://satobs.org/seesat_ref/misc/ROSAT_decay_predictions_v1.pdf
    >
    > Over the span of the data, the predicted date of decay has varied between mid-Oct 22 and early Oct 26 UTC, but in recent
    > days it has narrowed to between late Oct 22 and early Oct 24.
    
    
    It is a nice and bright (and fast) object currently. I observed a pass this 
    evening, in twilight (sun at -8 degrees, blue sky with first stars). It zipped 
    across the sky, attaining mag. +1, easily visible naked-eye.
    
    A photograph from this pass can be seen here:
    
    http://sattrackcam.blogspot.com/2011/10/observing-another-doomed-satellite.html
    
    - Marco
    
    -----
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    e-mail: sattrackcam@wanadoo.nl
    
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    Station (b)log: http://sattrackcam.blogspot.com
    Twitter: @Marco_Langbroek
    -----
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