[aprssig] [amsat-bb] Tiangong Re-entry on Heavens bove

Robert Bruninga bruninga at usna.edu
Sat Mar 31 20:55:17 EDT 2018

> Hi Bob, do you know the object number by chance?

No, but this link shows that the higher probabilities or re-entry are
between about 38 to 43 degree latitudes north and south.


Im not sure why those would be slightly higher.  43 degrees is its maximum
excursion (matches its inclination)...  Maybe its because as it passes
over the equatorial bulge, it sees the higher drag and that will start the
demise which will occur then 20 minutes later?

-----Original Message-----
From: Robert Bruninga
Sent: Saturday, March 31, 2018 9:16 AM
Subject: [amsat-bb] Tiangong Re-enetry on Heavens bove

You can see the live track of Taengong to re-enter in the next 24 hours on

Just remember, as it suffers increased drag, it will speed up and be ahead
of classic predictions.

But at least you can see when you are under the orbit as to whether it is
worth going outside.  I 'd go out several minutes before the prediction
since we dont know how quickly they are updating the elements as it speeds

and even if it is daytime, you will see it if it comes in in your area...

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