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Автор Олег, 01.05.2017 21:04:25

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tnt22

Цитата Joseph Remis @jremis 44 мин. назад

Obj. 46177 FALCON 9 DEB RETAINING ROD decay prediction: September 14, 2020 UTC 17h23mn ± 38h.

Запуск 2020-08-18, объект 2020-057BN

tnt22

Цитата Joseph Remis @jremis 3 ч. назад

Obj. 44253 STARLINK-39 decay prediction: September 11, 2020 UTC 02h04mn ± 12h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029U

tnt22

К #915

Цитата Dave 'Indoor Cat' Dickinson @Astroguyz 3 ч. назад

It's down. The Avum debris (adapter) COSPAR ID 2017-044C reentered earlier today at 3:59 UT+/-22 minutes, centered over the Siberian Arctic under daytime skies: https://aerospace.org/reentries/avum-debris-adaptor-id-42902...


tnt22

К #919

Цитата Dave 'Indoor Cat' Dickinson @Astroguyz 2 ч. назад

#Starlink 56 (COSPAR ID 2019-029BA) came down early as well... the reentry window was yesterday at 15:09 +/- 2 hours.  https://aerospace.org/reentries/starlink-56-id-44283

tnt22

13.09.2020 02:21:58 #924 Последнее редактирование: 13.09.2020 02:27:02 от tnt22
Цитата Joseph Remis @jremis 11 сент.

Obj. 44254 STARLINK-32 decay prediction: September 12, 2020 UTC 04h15mn ± 4h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029V

tnt22

Цитата Joseph Remis @jremis 2 ч. yfpfl

Obj. 44251 STARLINK-37 decay prediction: September 17, 2020 UTC 17h34mn ± 32h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029S

tnt22

Цитата Joseph Remis @jremis 2 ч. назад

Obj. 44290 STARLINK-78 decay prediction: September 17, 2020 UTC 18h30mn ± 31h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029BH

tnt22

К #919 и #924

Цитата Jonathan McDowell @planet4589 20 мин. назад

More Starlink V0.9 reentries: Starlink 56 down on Sep 10 and Starlink 32 on Sep 12.


 EXOSS Meteors Флаг Бразилии Комета Звездочки в глазах @exossorg 11 ч. назад

Imagens da reentrada do Starlink-32 sobre São Paulo e registrado por câmeras Exoss

#starlink #reentry #exoss
https://video.twimg.com/ext_tw_video/1304750109620568070/pu/vid/1280x720/S2Syjv1RFa8Q-OBO.mp4 (1:31)

tnt22

13.09.2020 18:59:44 #928 Последнее редактирование: 13.09.2020 19:02:38 от tnt22
Цитата Joseph Remis @jremis 7 ч. назад

Obj. 44256 STARLINK-42 decay prediction: September 17, 2020 UTC 17h56mn ± 28h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029X

tnt22

Цитата Joseph Remis @jremis 2 ч. назад

Obj. 44266 STARLINK-54 decay prediction: September 14, 2020 UTC 14h49mn ± 6h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029AH

tnt22

Цитата Joseph Remis @jremis 3 ч. назад

Obj. 46176 FALCON 9 DEB RETAINING ROD decay prediction: September 19, 2020 UTC 22h37mn ± 38h.

Запуск 2020-08-18, объект 2020-057BM

tnt22

Цитата Joseph Remis @jremis 18 мин. назад

Obj. 44285 STARLINK-50 decay prediction: September 15, 2020 UTC 23h04mn ± 15h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029BC

tnt22

Цитата Joseph Remis @jremis 1 ч. назад

Obj. 46270 ELECTRON R/B decay prediction: September 20, 2020 UTC 13h22mn ± 36h.

Запуск 2020-08-31, объект 2020-060C

tnt22

К #929

Цитата Dave 'Indoor Cat' Dickinson @Astroguyz· 8 ч

It's down. @SpaceX's #Starlink-54 satellite (COSPAR ID 2019-029AH) reentered yesterday at 21:39 UT +/-14 minutes over the central Pacific under daytime skies:  https://aerospace.org/reentries/starlink-54-id-44266...


tnt22

Цитата Joseph Remis @jremis 39 мин. назад

Obj. 44267 STARLINK-69 decay prediction: September 16, 2020 UTC 06h43mn ± 3h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029AJ

tnt22

Цитата Joseph Remis @jremis 2 ч. назад

Obj. 44264 STARLINK-35 decay prediction: September 21 2020 UTC 09h07mn ± 33h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029AF

tnt22

Цитата Joseph Remis @jremis 1 ч. назад

Obj. 46175 FALCON 9 DEB RETAINING ROD decay prediction: September 21 2020 UTC 16h10mn ± 34h.

Запуск 2020-08-18, объект 2020-057BL

tnt22

К #928, #935, #925, #934, #926

Цитата Jonathan McDowell @planet4589 2 ч. назад

Starlink 42 reentered over the Azores at 0836 UTC Sep 16. Starlink 35, 36, 3769 and 78 also reentered on Sep 15 and 16.  It's really raining Starlinks! Of the V0.9 batch, 26 remain operating, 26 deorbited, and 8 decaying.

tnt22

Цитата Joseph Remis @jremis 4 ч. назад

Obj. 44269 STARLINK-57 decay prediction: September 17, 2020 UTC 16h43mn ± 4h.
Prediction assuming no further maneuvering until decay.

Запуск 2019-05-24, объект 2019-029AL

tnt22

Цитата Jonathan McDowell @planet4589 49 мин. назад

Starlink 50 came down this morning; Starlink 57 is predicted to reenter tonight.


47 мин. назад

I've just written about the Starlink reentries in JSR latest.html, but I'll repeat my comments here.  After 63 years of orbital spaceflight this is a qualtiatively new kind of orbital decay (hi @orbital_decay !)
(1/n)


46 мин. назад

it's not a normal deorbit and not a normal orbital decay, but something inbetween. The Starlink satellites are, apparently,  retired by continuously lowering their orbit with electric propulsion.


46 мин. назад

Reentry occurs in a way similar to uncontrolled reentry - eventually the satellite is low enough and the ambient density is high enough that the vehicle heats, breaks up and is destroyed.


45 мин. назад

The crucial point here is that the *location* of the breakup on the Earth is unpredictable and uncontrolled, in contrast to an impulsive deorbit where the rapid elliptical-orbit descent from a relatively high apogee means that reentry location is predetermined fairly precisely.


44 мин. назад

These Starlink retirements should perhaps be termed not deorbits but `propulsion-assisted orbital decay' - they are more like normal uncontrolled orbital decay but speeded up by the thrusters.