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tnt22

ЦитироватьJonathan McDowell‏Подлинная учетная запись @planet4589 24 мин. назад

Soyuz MS-08's third stage rocket confirmed to have reentered at 0125 UTC Mar 25 over 42N 8E near Ajaccio, Corsica

поц

#201
Цитировать Joseph Remis‏ @jremis сейчас29 минут назад
 
 
No TLEs for 37820 #Tiangong1 since more than 24h. Could this be true and Tiangong 1 deorbited yesterday and decayed in Pacific Ocean?

China claims it is still in control of Tiangong-1 space station and can decide where it will crash

поц

#202
Цитироватьtnt22 пишет:
Jonathan McDowell ‏Подлинная учетная запись @planet4589 24 мин. назад

Soyuz MS-08's third stage rocket confirmed to have reentered at 0125 UTC Mar 25 over 42N 8E near Ajaccio, Corsica
почему ж тогда сайт http://www.n2yo.com/?s=43239 до сих пор ведёт этот объект и высота его орбиты не была меньше 115 км в течении дня? Однозначно, тут кто-то врёт: или ГУРУ Jonathan McDowell или вышеуказанный сайт



вот свежий скан экрана (высота орбиты ~110км):

amez

Цитироватьпоц пишет:
Цитироватьtnt22 пишет:
Jonathan McDowell ‏Подлинная учетная запись @planet4589 24 мин. назад

Soyuz MS-08's third stage rocket confirmed to have reentered at 0125 UTC Mar 25 over 42N 8E near Ajaccio, Corsica
почему ж тогда сайт http://www.n2yo.com/?s=43239 до сих пор ведёт этот объект и высота его орбиты не была меньше 115 км в течении дня? Однозначно, тут кто-то врёт: или ГУРУ Jonathan McDowell или вышеуказанный сайт
...вышеуказанный сайт. Там очевидно нет специального человека, останавливающего трек сразу после сгорания объекта, так что он продолжает рисовать, как если бы не было физической атмосферы - это математика :)

поц

Вы хотите сказать что объект "сгорел" на высоте более 115км? меня терзают сомнения...

tnt22

ЦитироватьDr Marco Langbroek‏ @Marco_Langbroek 7 ч. назад

The final JSpOC TIP shows that the #Soyuz upper stage reentered over Europe last night, 1:25 +- 1m UT. Map shows location (JSpOC TIP); what/where my last pre-reentry forecasts were; and a post-cast using orbits not yet released when I did my last forecast. @SSC_NL @cosmos4u

tnt22

Цитироватьпоц пишет:
почему ж тогда сайт http://www.n2yo.com/?s=43239 до сих пор ведёт этот объект
Будьте к людЯм снисходительны - как-никак день воскресный. Отдохнут - поправят, не на службе ведь.
Ниже скрин JSpOC (в просторечии и обобщении - НОРАД)


Верхняя строка  показывает, что сабж - уже история, выпущено соответствующее уведомление...

tnt22

ЦитироватьDr Marco Langbroek‏ @Marco_Langbroek 3 ч. назад

Video footage from Italy of the #reentry last night near 1:25 GMT of the #Soyuz upper stage 2018-026B, from the recent launch to the ISS:
ЦитироватьCISU - L'ufologia @CisuUfologia 7 ч. назад

В ответ @Marco_Langbroek @SSC_NL @cosmos4u
Possible visual observations from Italy (with video): http://www.ondanews.it/strana-scia-luminosa-avvistata-nel-cielo-del-vallo-diano-si-pensa-alla-stazione-cinese-tingong-1/ ... (h/t Pasquale Russo, Cisu Campania)
Видео из Италии:
https://video-arn2-1.xx.fbcdn.net/v/t43.1792-2/28948602_1800653610242513_4720209048744493056_n.mp4?_nc_cat=0&efg=eyJybHIiOjE1MDAsInJsYSI6MTAyNCwidmVuY29kZV90YWciOiJzdmVfaGQifQ%3D%3D&rl=1500&vabr=378&oh=bf7efdf7f3fbba2ec9944a51b1c6a272&oe=5AB8045C (0:23)

tnt22

https://sattrackcam.blogspot.ru/2018/03/the-atmospheric-reentry-of-soyuz-upper.html
ЦитироватьSunday, 25 March 2018

The atmospheric reentry of the Soyuz upper stage 2018-026B on March 25


click map to enlarge
Спойлер
On March 21 at 17:44 GMT,  a Soyuz rocket (Soyuz MS-08) was launched from Baikonur in Kazakhstan, bringing three new astronauts to the International Space Station.

The upper stage from this rocket (2018-026B) reentered the atmosphere last night, producing a nice spectacle in the sky. The reentry was seen from southern Europe, and filmed from Italy. The still below is from video footage that you can find here on the Italian Ondanews website.


Сlick image to enlarge. Link to newsitem with video
[свернуть]
The US Military tracking network JSpOC gives a final TIP bulletin placing reentry at 25 March 1:25 UT ± 1 minute near 41.9 N, 8.1 E, depicted as a star symbol in the map in top of this page. The ± 1 minute indicates that this time and position come from an Infrared observation by one of the US Early warning satellites and hence should be very accurate.
Спойлер
I had been issuing forecast on twitter prior to this reentry, based on modelling in SatAna/SateEvo and GMAT. In addition to the JSpOC TIP position and time, the map above also gives some of my own modelling results for this reentry. The open circles were my two last proper forecasts, made before the actual reentry happened. The red dots are two "post-casts", i.e. forecasts made after-the -fact using orbital elements that were not yet available when I made my last forecast the evening before. The nominal position of the SatAna/SatEvo post-cast is only 10 minutes from the JSpOC TIP.
[свернуть]

поц

#209
ЦитироватьJoseph Remis‏ @jremis 3 ч.3 часа назад


New TLE just published. Still in orbit !


tnt22

Цитироватьпоц пишет:
ЦитироватьJoseph Remis ‏ @jremis 3 ч.3 часа назад

New TLE just published. Still in orbit !
поц, Ваша безадресная информация к чему относится   :?:   :?:   :?:   Чей новый набор TLE опубликован   :?:   Что всё ещё находится на орбите   :?:

tnt22

http://spaceflight101.com/soyuz-rocket-stage-burns-up-over-the-mediterranean/
ЦитироватьSoyuz Rocket Stage Burns Up over the Mediterranean
March 25, 2018


Soyuz Re-Entry seen fr om Vallo di Diano – Credit: ondanews.it
The uncontrolled, destructive re-entry of a Soyuz rocket stage that helped boost a three-man crew into orbit earlier this week was seen fr om the Mediterranean region in the early hours of Sunday per reports and videos coming fr om the French Riviera and Central Italy – indicating the 6.7-meter long rocket body met its end over the Mediterranean Sea, supported by data from the U.S. Joint Space Operations Center.

Soyuz rocket stages re-entering the atmosphere have been an often-spotted sight in recent years, in part due to the launch rate of the Russian workhorse and the fact that most Soyuz third stages end up in fairly short-lived orbits, re-entering within a period of days. In the last three years, Soyuz stages surprised observers in Newfoundland, Las Vegas and New Zealand. Night owls around the Mediterranean received a similar show in the night to Sunday, just after clocks shifted to Daylight Saving Time across Europe.
Спойлер

Soyuz MS-08 Liftoff – Photo: NASA/Joel Kowsky

The Soyuz FG rocket lifted off from Kazakhstan's Baikonur Cosmodrome at 17:44 UTC on Wednesday, March 21st, carrying into orbit the Soyuz MS-08 spacecraft headed to the International Space Station with veteran Cosmonaut Oleg Artemyev and NASA Flight Engineers Drew Feustel and Ricky Arnold. Blasting off from the remote launch site, Soyuz dropped its four boosters two minutes after taking flight and shed its large central core before hitting the five-minute mark, handing off to the Block I third stage for the final push into orbit. Soyuz MS-08 separated from the Block I eight minutes and 48 seconds after liftoff, later climbing up toward the Space Station while the spent third stage remained in the relatively low injection orbit.


Soyuz FG Block I Stage – Photo: Roscosmos/Tsenki

Soyuz MS-08 lifted itself into a 400-Kilometer orbit wh ere it linked up with the International Space Station on Friday to top up the Expedition 55 crew at its full complement of six members. While the three Soyuz kicked off their stay of 158 days, the rocket stage that had helped them into orbit was approaching the fiery end of its life as it descended toward the dense layers of Earth's atmosphere.

The 2,410-Kilogram Block I started out in an orbit of 191 by 222 Kilometers, inclined 51.64 degrees, according to tracking data from the Joint Space Operations Center that monitors all sizeable space objects in orbit through ground-based radar and optical tracking. At an altitude of 200 Kilometers, objects experience a fair amount of drag in the form of collisions with a mix of atoms, ions and molecules present in the upper atmosphere at a density that varies greatly depending on solar activity.

Typically, Soyuz stages from ISS launches last between two and five days – depending on their initial orbit and state of the atmosphere.


Framegrab: Leonida TV

Interacting with particles in the lower thermosphere, the Block I stage began losing altitude at a swift rate and drag acting on the mostly hollow rocket body continued rising as it headed toward the mesosphere ahead of its final dive into the upper stratosphere wh ere most of the rocket's structure was expected to be incinerated without reaching the ground.

Reports of a bright phenomenon crossing the sky emerged on Sunday in Italian and French press outlets and dozens of posts on Social Media reported a bright object streaking across the sky over the French Riviera, Tuscany and Southern Italy at 3:30 a.m. local time (1:30 UTC). Sensationalized reports spoke of 'panic' in the streets of Latina and tied the phenomenon to the Chinese Tiangong-1 space laboratory that is due to re-enter in the coming days and will likely be the most-watched re-entry event of the year.


Soyuz Block I Ground Track, Entry Point & Observation Locations – Image: Spaceflight101/Google Earth

Videos posted on YouTube from a number of locations show the typical appearance of an artificial space object: the characteristic low speed, fragmentation into a number of glowing pieces, a long debris and plasma tail, and the longevity of the event – visible for over half a minute from most observation locations.

The Joint Space Operations Center pin-pointed the re-entry of the Block I upper stage at 01:25 UTC ±1 minute – a two-minute entry window centered on 41.9°N and 8.1°E. This data was obtained through the U.S. Missile Early Warning architecture comprising several sharp-eyed infrared-sensing satellites in Geostationary Orbit to detect the infrared signature of missile launches. Their infrared vision also allows them to track the IR emissions from sizeable space objects entering the atmosphere – providing a definitive location and time within a narrow window.

In the final minutes of its flight, the rocket stage was headed from north west to south east, crossing over southern France from Île d'Oléron to Marseille before flying over the Mediterranean Sea, crossing right between the islands of Corsica and Sardinia.


Business end of Block I Stage – Photo: Roscosmos/Tsenki

The re-entry time referenced by JSpOC corresponds to Block I passing 80 Kilometers in altitude wh ere the object is immersed in plasma and typically begins breaking apart as the result of drag building up to a destructive force. With a two-minute window of uncertainty, this could have occurred anywhere from Montpellier to a point 150 Kilometers north of the Island of Sicily.

The Block I third stage of the Soyuz is 6.74 meters long and 2.66 meters in diameter, holding nearly 23 metric tons of propellant at launch, expended during a four-minute burn by its 297.9-Kilonewton RD-0110 engine with four combustion chambers and nozzles, assisted by four gimbaling verniers for steering.

>> Soyuz FG Overview

Starting its final dive, the rocket stage would have become visible around 104 Kilometers in altitude when plasma began building up around its structure. The shock wave layer forming just in front of the spacecraft and any separated components leads to considerable heating that causes the incineration of the majority of the spacecraft structure between 50 and 70 Kilometers in altitude.


Photo: Roscosmos/Tsenki

Temperatures reached during re-entry can melt most metal types used on the spacecraft and most of the fragments created on entry fully burn up, leaving a cloud of dust in the upper atmosphere.[

The majority of the rocket's structure was expected to burn up in the atmosphere; however, SL-4 rocket stages contain a number of dense components that can survive the entry process and reach the ground, including some of the heavier engine components like turbopump shafts as well as pressurant tanks.

Dense components that survive re-entry usually impact 800 to 1,300 Kilometers downrange from the Orbital Decay Point and are strongly influenced by winds in the lower atmosphere. Based on the decay point determined by JSpOC and the available observer reports, any surviving debris of the rocket stage likely impacted in the Mediterranean Sea south east of Sicily.

https://www.youtube.com/watch?v=N3tosUr1b20

https://www.youtube.com/watch?v=UyuEYO2sU2Q

https://www.youtube.com/watch?v=mr3JERBb1HM

https://www.youtube.com/watch?v=jmuhEncwhe0

https://www.youtube.com/watch?v=1z7bXxF50_Q
[свернуть]
 
Re-Entry Data
Спойлер

Photo: Roscosmos
NORAD ID: 43239
Object: SL-4 R/B
Origin: Russia
Type: Block I Soyuz Upper Stage
Mass: 2,410 Kilograms
Launch: March 21, 2018  – 17:44:23 UTC
Launch Site: 1/5 Baikonur Cosmodrome
Launch Vehicle: Soyuz FG
Ascent Duration: 8 Minutes & 48 Seconds
Payload: Soyuz MS-08 (7,220kg)

Initial Orbit: 192 by 222km, 51.64°
Last Orbit Data: 144 by 153 km, 51.63°

Re-Entry: March 25, 2018 – 01:25 UTC ±1 Minute
Re-Entry Location: Mediterranean Sea
[свернуть]

tnt22

ЦитироватьJonathan McDowell‏Подлинная учетная запись @planet4589 16 мин. назад

The Iridium 23 satellite now in a 161 x 275 km orbit (above geoid), approaching reentry later today. It was decommissioned Feb 19 after being lowered out of the operational constellation Feb 10

поц

Цитироватьtnt22 пишет:
поц , Ваша безадресная информация к чему относится  :?:   :?:   :?:  Чей новый набор TLE опубликован  :?:  Что всё ещё находится на орбите  :?:
уважаемый, нужно чужие сообщения тоже просматривать, а не только свои штамповать...
это относилось к сообщению http://novosti-kosmonavtiki.ru/forum/messages/forum12/topic15969/message1753502/#message1753502, если Вы не поняли

поц

#214
ЦитироватьJoseph Remis‏ @jremis сейчас58 секунд назад


Update: obj. 24906 IRIDIUM 23 decay prediction: March 27, 2018 UTC 23h10mn ± 2h
Possible sighting locations: Porto: 21h11mn Dublin: 21h14mn Açores: 22h37mn Porto Alegre: 23h48mn Cayenne: 23h56mn Valdivia: 01h13mn Bogota: 01h23mn New-York: 01h33mn

tnt22

#215
Цитироватьпоц пишет:
нужно чужие сообщения тоже просматривать, а не только свои штамповать...
это относилось к сообщению http://novosti-kosmonavtiki.ru/forum/messages/forum12/topic15969/message1753502/#message1753502 , если Вы не поняли
Слава тебе, Господи, царь-батюшка снизошел до нас, сирых и убогих, трёх лет не прошло... Вообще-то тема сия не одному какому-то конкретному сабжу посвящена, между Вашими сообщениями #202 и #210 - так, на секундочку, - прошло более 10-ти часов и было размещено ещё 7 сообщений, в т.ч. 2 Ваших собственных, никоим боком не связанных с объектом 37820... По сему - уж чья бы корова мычала... - к себе и примените Ваше "нужно чужие сообщения тоже просматривать". Цитировать чужие посты вроде бы умеете, однако ж свой почему-то не стали. И, таки в сугон, если было лень себя цитировать, то пошто твит-то #210 кастрировали, пошто суть выхолостили  :?:  Он вообще-то вот такой
ЦитироватьJoseph Remis‏ @jremis 6 ч. назад

New TLE just published. Still in orbit !
ЦитироватьJoseph Remis @jremis

No TLEs for 37820 #Tiangong1 since more than 24h. Could this be true and Tiangong 1 deorbited yesterday and decayed in Pacific Ocean? [url="https://www.ibtimes.co.uk/china-claims-it-still-control-tiangong-1-space-station-can-decide-where-it-will-crash-1655315"]https://www.ibtimes.co.uk/china-claims-it-still-control-tiangong-1-space-station-can-decide-where-it-will-crash-1655315[/url] ...
[/url]
Сразу всё встаёт на свои места и приобретает конкретику  :evil:  И вопросов бы не было, ТБМ...
P.S. Кста, Дж. Реми в своей ленте не только о TG-1 публикует сообщения, если что...

tnt22

ЦитироватьJonathan McDowell‏Подлинная учетная запись @planet4589 5 ч. назад

Iridium 23 has now reentered, per @SpaceTrackOrg

4 ч. назад

Final orbit for Iridium 23 was 139 x 178 km (ellipsoid) 130 x 177 km (sphere)

tnt22

ЦитироватьJonathan McDowell‏Подлинная учетная запись @planet4589 4 ч. назад

Next up for reentry is cubesat QB50-US02 Atlantis, between 0500 and 0700 UTC. Latest orbit is 187 x 199 km (ellipsoid).
Уже история:

tnt22

ЦитироватьMatt Desch‏ @IridiumBoss 45 мин. назад

Iridium's SV23 reentered the atmosphere last night ~8pm edt while over So. America. It was born into our "plane 2" on 8/21/97, deboosted on Feb 9, and depassivated on Feb 19. Thank you for over 20 years of great service and happy retirement!

поц

#219
ЦитироватьJoseph Remis‏ @jremis сейчас2 минуты назад


Obj. 41486 FLOCK 2E 3 decay prediction: April 05, 2018 UTC 19h19mn ± 34h