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

From: Thierry Legault (legault@club-internet.fr)
Date: Thu Oct 13 2011 - 20:47:34 UTC

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    Thank you Marco, good to know that it's bright and easily visible. I 
    will have a series
    of nice passes over France and will try to take detailed videos, as I 
    did with UARS,
    if weather is favorable.
    
    At 21:22 13/10/2011, Marco Langbroek wrote:
    >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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    Thierry Legault
    www.astrophoto.fr
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