Anyone have any idea what just happened to the R/B from this launch? Did they perform a de-orbit manoever???1 42802U 17038B 17293.72551647 .00027554 34224-5 23039-2 0 99962 42802 24.5026 10.7656 8296019 214.1455 24.5398 1.15434098 13321 42802U 17038B 17298.50320531 -.00000191 22902-6 00000+0 0 99932 42802 24.2449 8.5033 5926106 217.8158 334.7218 4.30932446 13991 42802U 17038B 17298.50320531 -.00000191 22902-6 00000+0 0 99932 42802 24.2449 8.5033 5926106 217.8158 334.7218 4.30932446 13991 42802U 17038B 17298.50320531 -.00000191 22902-6 00000+0 0 99932 42802 24.2449 8.5033 5926106 217.8158 334.7218 4.30932446 13991 42802U 17038B 17298.50320531 -.00000191 22902-6 00000+0 0 99932 42802 24.2449 8.5033 5926106 217.8158 334.7218 4.30932446 13991 42802U 17038B 17299.50658123 .00002909 -18328-4 00000+0 0 99992 42802 24.1857 6.6360 2957658 221.3868 298.2410 9.85103635 1432
Anyone have any idea what just happened to the R/B from this launch? Did they perform a de-orbit manoever???
Can someone translate those TLEs into date, apogee, and prrigee?
Fri Oct 20 2017 17:24:44 GMT 154/63757kmWed Oct 25 2017 12:04:36 GMT 120/19026kmThu Oct 26 2017 12:09:28 GMT 95/5533km Fri Oct 27 2017 Decayed
Quote from: Raul on 10/29/2017 08:17 amFri Oct 20 2017 17:24:44 GMT 154/63757kmWed Oct 25 2017 12:04:36 GMT 120/19026kmThu Oct 26 2017 12:09:28 GMT 95/5533km Fri Oct 27 2017 DecayedSo they were separate TLEs. Can you explain why they had the same set number - 999 (first three digits of the last element of line 1)? I thought these were supposed to be incremented each time a new TLE set was created.
They are but I got them from Space-track.org where they are all 999 for some reason
Quote from: Notleslie on 10/29/2017 09:08 amThey are but I got them from Space-track.org where they are all 999 for some reasonSpace-track sets all set numbers in all TLEs for all objects to 999?
Quote from: Comga on 10/29/2017 03:40 amCan someone translate those TLEs into date, apogee, and prrigee?Fri Oct 20 2017 17:24:44 GMT 154/63757kmWed Oct 25 2017 12:04:36 GMT 120/19026kmThu Oct 26 2017 12:09:28 GMT 95/5533km Fri Oct 27 2017 Decayed
Quote from: Raul on 10/29/2017 08:17 amQuote from: Comga on 10/29/2017 03:40 amCan someone translate those TLEs into date, apogee, and prrigee?Fri Oct 20 2017 17:24:44 GMT 154/63757kmWed Oct 25 2017 12:04:36 GMT 120/19026kmThu Oct 26 2017 12:09:28 GMT 95/5533km Fri Oct 27 2017 DecayedAdding in the initial orbital elements from the Update thread and plotting:It looks like the second stage hit a brick wall in late October.Possibly had the perigee tidally pulled lower and it snowballed.
Quote from: Comga on 10/31/2017 03:44 pmQuote from: Raul on 10/29/2017 08:17 amQuote from: Comga on 10/29/2017 03:40 amCan someone translate those TLEs into date, apogee, and prrigee?Fri Oct 20 2017 17:24:44 GMT 154/63757kmWed Oct 25 2017 12:04:36 GMT 120/19026kmThu Oct 26 2017 12:09:28 GMT 95/5533km Fri Oct 27 2017 DecayedAdding in the initial orbital elements from the Update thread and plotting:It looks like the second stage hit a brick wall in late October.Possibly had the perigee tidally pulled lower and it snowballed.That brick wall is known as Earth's atmosphere.
Quote from: woods170 on 10/31/2017 05:51 pmQuote from: Comga on 10/31/2017 03:44 pmQuote from: Raul on 10/29/2017 08:17 amQuote from: Comga on 10/29/2017 03:40 amCan someone translate those TLEs into date, apogee, and prrigee?Fri Oct 20 2017 17:24:44 GMT 154/63757kmWed Oct 25 2017 12:04:36 GMT 120/19026kmThu Oct 26 2017 12:09:28 GMT 95/5533km Fri Oct 27 2017 DecayedAdding in the initial orbital elements from the Update thread and plotting:It looks like the second stage hit a brick wall in late October.Possibly had the perigee tidally pulled lower and it snowballed.That brick wall is known as Earth's atmosphere.As Lar said, the atmosphere is not a brick wall. Look at something like the orbital decay of Tiangong 1. It spent all of October in the atmosphere below 310 km without falling out of the sky. The decay does, however, get steeper all the time.The Bulgariasat second stage spent four months dipping below 200 km on each orbit. Then something passed a threshold, either a tipping point in atmospheric density or an external event, like a gravitational tug from the Moon. A salient question is what was that event, and what does it say about the decay of other second stages. But that's for another thread.
The Bulgariasat second stage spent four months dipping below 200 km on each orbit. Then something passed a threshold, either a tipping point in atmospheric density or an external event, like a gravitational tug from the Moon. A salient question is what was that event, and what does it say about the decay of other second stages. But that's for another thread.
All that is known.The atmosphere doubles in density roughly every 20 kmLowering the perigee reduces the orbital period resulting in more passes through the top of atmosphere per day.The emptied second stage is particularly light and large, almost a giant aluminum balloon.Nevertheless, the terminal decay is rather dramatic.