Re: Ariane 5 Debris ( SYLDA Dispenser ) decay info

From: Björn Gimle (bjorn.gimle@gmail.com)
Date: Fri Apr 05 2013 - 19:25:16 UTC

  • Next message: Kevin Fetter: "Video of unid, on the night it came to me"

    Don't forget Heavens-Above, it allows you to select daylight and
    nightly "invisible" passes.
    
    At the moment though it predicts passes up to Apr 08 !
    
    Example:
    http://www.heavens-above.com/PassSummary.aspx?satid=30796&lat=-6.16667&lng=106.8&loc=Jakarta&alt=1&tz=UCTm7
    and select "all" !
    
    2013/4/5 Björn Gimle <bjorn.gimle@gmail.com>:
    > First, predictions posted are usually more accurate, around 15% of
    > remaining lifetime. This would be around +-8 hrs
    > Second, although the predicted decay may be close to you, a revised
    > decay time would probably end near the same part of the orbit, but the
    > Earth, and your location, would be at a different position, and the
    > decay might be 15000 km from you.
    > Third, it depends on your location - I used predicted TLEs from
    > www.calsky.com and found that using the last computed TLE made the
    > last pass only 12 min earlier than using the TLE from noon today.
    >
    > So, you need to run a prediction - for night,day or shadow, depending
    > on the decay time, and watch ALL possible passes.
    >
    >
    >
    > 2013/4/5 Sankaranarayanan K V <kvsankar@gmail.com>:
    >> Thank you, Kevin. The predicted re-entry time has a range of plus/minus 14
    >> hours for the prediction epoch 04 APR 2013 @ 07:51:16.125 UTC. Will this
    >> converge towards the reentry? How long should I be watching around the
    >> reentry time?
    >>
    >> The site says: 06 APR 2013 @ 16:59 UTC ± 14 hours
    >>
    >> - Sankar
    >>
    >>
    >> On Fri, Apr 5, 2013 at 5:57 PM, Kevin Fetter <kfetter@yahoo.com> wrote:
    >>
    >>> I expect a nice light show, it will be bright, ie naked eye range.
    >>>
    >>> Good luck, and enjoy the show, if you get to see it.
    >>>
    >>>
    >>> --- On Fri, 4/5/13, Sankaranarayanan K V <kvsankar@gmail.com> wrote:
    >>>
    >>> > What can one
    >>> > expect to see?
    >>> > How bright would this re-entry be?
    >>>
    >>>
    >>> _______________________________________________
    >>> Seesat-l mailing list
    >>> http://mailman.satobs.org/mailman/listinfo/seesat-l
    >>>
    >> -------------- next part --------------
    >> An HTML attachment was scrubbed...
    >> URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20130405/45ba2686/attachment.html
    >> _______________________________________________
    >> Seesat-l mailing list
    >> http://mailman.satobs.org/mailman/listinfo/seesat-l
    >
    >
    >
    > --
    > ----------------------------------------
    > Björn Gimle, COSPAR 5919
    > 59.2576 N, 18.6172 E, 23 m
    > Phone: +46 (0)8 571 43 312
    > Mobile: +46 (0) 704 385 486
    
    
    
    -- 
    ----------------------------------------
    Björn Gimle, COSPAR 5919
    59.2576 N, 18.6172 E, 23 m
    Phone: +46 (0)8 571 43 312
    Mobile: +46 (0) 704 385 486
    _______________________________________________
    Seesat-l mailing list
    http://mailman.satobs.org/mailman/listinfo/seesat-l
    



    This archive was generated by hypermail 2b29 : Fri Apr 05 2013 - 19:30:10 UTC