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

Greg D ko6th.greg at gmail.com
Sat Mar 31 21:41:54 EDT 2018

Gpredict's database shows it as Catalog number 37820.

greg at server:~/.config/Gpredict/satdata> more 37820.sat
TLE1=1 37820U 11053A   18090.75926316  .01965660  91360-5  17017-3 0  9993
TLE2=2 37820  42.7468 202.2368 0007442 358.3143   1.7378 16.38245761373833

Greg  KO6TH

Robert Bruninga wrote:
>> 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.
> https://www.theguardian.com/science/2018/mar/30/chinas-tiangong-1-space-st
> ation-will-crash-to-earth-this-weekend
> 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?
> Bob
> -----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
> http://www.heavens-above.com/
> 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
> up.
> and even if it is daytime, you will see it if it comes in in your area...
> Bob
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