Thank you, Björn. Reading earlier posts on this thread I just realized I hadn't really thought through how the altitude of re-entry would affect the visibility. Going through the heavens-above predictions, I see that I have only day-time passes and most of them are low in altitude (as seen from my site, Bangalore, 12.9833° N, 77.5833° E). - Sankar On Sat, Apr 6, 2013 at 12:55 AM, Björn Gimle <bjorn.gimle@gmail.com> wrote: > 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? > >>> > -------------- next part -------------- An HTML attachment was scrubbed... URL: http://mailman.satobs.org/mailman/private/seesat-l/attachments/20130406/845ba2bb/attachment.html _______________________________________________ Seesat-l mailing list http://mailman.satobs.org/mailman/listinfo/seesat-l
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