Re: [amsat-bb] Tiangong Re-entry on Heavens bove
Hi Bob, do you know the object number by chance?
Thanks Ted K7TRK
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Robert Bruninga Sent: Saturday, March 31, 2018 9:16 AM To: amsat bb Cc: TAPR APRS Mailing List 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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
It is because the amount of time it spends between 38 and 43 is longer than the lower latitudes. Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 3/31/2018 7:55 PM, 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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Gpredict's database shows it as Catalog number 37820.
greg@server:~/.config/Gpredict/satdata> more 37820.sat [Satellite] VERSION=1.1 NAME=TIANGONG 1 NICKNAME=TIANGONG 1 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 STATUS=0
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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ aprssig mailing list aprssig@tapr.org http://www.tapr.org/mailman/listinfo/aprssig
Tiangong 1 is NORAD CAT ID 37820 (INTLDES 2001-053A.
But note that with the drag that Tiangong 1 is experiencing TLEs will probably not be useful.
But you can see the live ground track of Tiangong 1 at Heavens-Above. http://www.heavens-above.com/
Ray Hoad WA5QGD AMSAT-NA Orbital Elements Manager
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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
On Sat, Mar 31, 2018 at 7:55 PM, Robert Bruninga bruninga@usna.edu 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.
N2YO says:
COSPAR 2011-053A NORAD 37820.
https://www.n2yo.com/info/?a=61
*cinches down tinfoil helmet*
participants (6)
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Greg D -
Joe -
Peter Laws N5UWY -
Ray Hoad -
Robert Bruninga -
Ted Krempa