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Hayabusa 2 (Хаябуса-2), Procyon – H-IIA F26 – Танэгасима – 03.12.2014 04:22:04 UTC, (успешно)
 
https://tass.ru/kosmos/6789132
Цитата
22 АВГ, 17:54
Японская капсула с образцами пород астероида Рюгу приземлится в Австралии в 2020 году

Планируется, что зонд, который сейчас находится рядом с астероидом, отправится на Землю в декабре 2019 года, он должен будет приблизиться к планете примерно за 12 месяцев

ТОКИО, 22 августа. /Корр. ТАСС Алексей Заврачаев/. Капсула с образцами пород астероида Рюгу, взятых японским зондом "Хаябуса-2" ("Сокол-2"), приземлится отдельно от аппарата в запретной зоне Вумера на территории штата Южная Австралия. Об этом сообщило в четверг Японское агентство аэрокосмических исследований (JAXA).

В настоящее время японские и австралийские власти практически завершили процесс согласования с целью предоставления доступа в эту зону. Она была создана после окончания Второй мировой войны совместно с Великобританией. В частности, там соорудили полигон для проведения ракетных испытаний. Отсюда же в 1967 году был запущен первый австралийский спутник, предназначенный для исследования верхних слоев атмосферы.

По плану, зонд, который сейчас находится рядом с астероидом, отправится в обратный путь на Землю в декабре этого года. Примерно за 12 месяцев он должен будет приблизиться к планете. Перед входом в атмосферу он сбросит капсулу с добытыми образцами. Это будет сделано на случай того, если с аппаратом что-либо случится во время приземления.

Астероид Рюгу (в переводе с японского - "Дворец дракона") находится между Землей и Марсом. "Хаябуса-2" был запущен к нему в декабре 2014 года с космодрома на японском острове Танэгасима. Особые надежды ученые возлагают на то, что на астероиде удастся обнаружить следы воды и органических веществ, что, как полагают, может помочь в разгадке тайны распространения жизни во Вселенной.

Зонд совершил уже две успешных посадки на космическое тело с целью забора грунта, а также сделал многочисленные снимки его поверхности.
 
Цитата
HAYABUSA2@JAXA‏ @haya2e_jaxa 8 ч. назад

In an operation today (August 26), the sample catcher was stored in the re-entry capsule (see figure). The sampler and capsule teams gathered to watch and the operation was completed successfully. The capsule is now ready for Earth return!

 
http://www.hayabusa2.jaxa.jp/en/topics/20190903e_TM/
Цитата
Postponement of target marker separation operation

The ’Target marker separation operation’ scheduled for September 5 has been postponed due to the spacecraft entering the Safe-Hold [*] state. The condition of the spacecraft is normal.

Background to the current situation:
Hayabusa2 is equipped with four reaction wheels that are used to control the posture of the spacecraft, and posture control is usually performed using three of these reaction wheels. On August 29, the back-up reaction wheel that has not been used since October last year was tested, and an abnormal value (an increased torque) as detected. The spacecraft therefore autonomously moved into the Safe-Hold state. Details of the cause of the abnormal torque value are currently under investigation. On August 30, restoration steps were taken and the spacecraft returned to normal. However, as the spacecraft moved away from the home position due to entering Safe-Hold, we are currently having to return to the home position. We will return to the home position this weekend.

The attitude of the spacecraft is controlled by three reaction wheels as before. Entering the Safe-Hold state is one of the functions employed to keep the spacecraft safe, which means that procedures have worked normally.

We will report again about the target marker separation when a new schedule has been decided.

Hayabusa2 Project
2019.09.03

* Safe-Hold occurs when an abnormality is detected in a spacecraft (such as an artificial satellite or Solar System astronomical probe). The solar cell panel is directed towards the Sun and the level of power generation is held constant while the spacecraft spins (rotates). This mode stabilises the posture and only the minimum necessary devices are active, such as those used for communication. The state gives the safety of the spacecraft the highest priority. In the case of Hayabusa2 which is currently in the vicinity of the asteroid, moving to Safe-Hold also accelerates the spacecraft away from the asteroid to avoid a potential collision.
 
Цитата
小惑星探査機「はやぶさ2」‏Подлинная учетная запись @haya2_jaxa 16 ч. назад

準備が整いましたので、本日(9月12日)、10:30 JSTに探査機はホームポジションから降下を始めました。ターゲットマーカ分離運用です。降下速度は、秒速3mm(時速約11m­)ですので、非常にゆっくりです。探査機はだんだん加速し、9月16日には高度1kmに達して、ターゲットマーカを分離する予定­です。
Цитата
Теперь, когда всё подготовлено,  в 10:30 JST 12 сентября (01:30 UTC 12 сентября) космический корабль начал спуск из своего исходного положения для проведения операции отделения маркера цели. Скорость спуска очень медленная и составляет 3 мм/с (около 11 м/ч). Космический корабль постепенно ускоряется, чтобы достигнуть высоты 1 км 16 сентября, когда намечено сбросить маркер цели.

Цитата
ilarina @_elbertina 3 ч. назад

Hayabusa2 started to very slowly descend back to Ryugu. The plan is to separate two target markers on Sep 16, preparing for MINERVA-II2 rover deployment later on. Target markers are supposed to represent the rover, so it's a rehearsal of sorts
 
09:00 UTC 16 сентября, высота 3,7 км. Сокол-2 начал передачу изображений, полученных камерой ONC-T. Адрес галереи указан в твите. Текущее изображение получено в 00:33 UTC  16 сентября с.г.
Цитата
小惑星探査機「はやぶさ2」 Подлинная учетная запись @haya2_jaxa 18 мин. назад

9月16日 10:00JST、高度は3.7㎞です。  望遠カメラONC-Tによる航法用画像のweb配信を開始しました。 http://www.hayabusa2.jaxa.jp/galleries/onc/nav20190916/ …  この画像は、9月16日 9:33JST受信の画像です。

Изменено: tnt22 - 16.09.2019 09:00:59
 
http://www.hayabusa2.jaxa.jp/en/topics/20190916e_TMORB/
Цитата
Target marker separation operation

From September 12 to September 17, the ‘Target marker separation operation’ will be performed. After that, the ‘Target marker orbit observation operation’ will continue. This is an operation to observe the target marker that goes around Ryugu, and it will be done until the target marker is landed (until about September 23). This operation was rescheduled from September 5 as announced in another article.

These ‘Target marker separation operation’ and ‘Target marker orbit observation operation’ are rehearsals for the separation operation of MINERVA-II2 Rover-2 (University consortium development) scheduled for October.

Figure 1 shows an overview of the operation. The descent starts at a low speed from September 12, and the TM is separated at a surface altitude of 1km from around 0:00 to 2:00 (JST) on September 17. A total of two TMs will be separated. They will be put into the equator and polar orbits around Ryugu, respectively. After that, the spacecraft moves to a position 20km away from Ryugu, with the sun behind. From that position, the optical camera continuously observes the TM trajectory descending around Ryugu. With the sun on the back, the retroreflective film covering the surface of the TMs shines brightly and can be observed. They will be observed until around September 23.


[Open in a separate window]
Figure 1 Overview of the target marker separation operation and orbit observation operation
(Image credit: JAXA)


Figure 2 shows the mounting position of the targer markers. B and A are already separated from the five target markers. This time, E and C will be separated.


[Open in a separate window]
Figure 2: Target marker.
(Image credit: JAXA)


Hayabusa2 Project
2019.09.16
 
Цитата
HAYABUSA2@JAXA‏ @haya2e_jaxa[/COLOR][COLOR=#657786] 5 мин. назад

September 16 at 15:52 JST: the altitude of the spacecraft is 3.5km. The first image was captured by the telephoto ONC-T at 15:13 JST. The Urashima Crater fills the whole photo, whose width is about 390m. The second image was taken by the wide-angle ONC-W1 camera at 15:43 JST.


 
Цитата
HAYABUSA2@JAXA @haya2e_jaxa[/COLOR] 23 мин. назад

Image of the first target marker ™ separation, TM-E!

Separation time: 2019/9/17 at 01:17 JST Altitude: 1km

This is an overlay of images taken every 4s (for ~1min) as the spacecraft ascends at 11cm/s. TM descent speed is still almost zero. ( JAXA, Chiba Inst. Tech & collab)




19 мин. назад

The separation image of the 2nd target marker, TM-C!

Separation time: 2019/9/17 at 01:24 JST Altitude: 1km

This is an overlay of images taken every 4s (for ~1min) while the spacecraft ascends at 11cm/s. TM descent speed is still almost zero. ( JAXA, Chiba Inst. Tech & collab)

 
https://spaceflightnow.com/2019/09/17/hayabusa-2-completes-practice-run-for-deployment-of-last-asteroid-lander/
Цитата
Hayabusa 2 completes practice run for deployment of last asteroid lander
September 17, 2019 | Stephen Clark


One of two target markers released by Japan’s Hayabusa 2 spacecraft is seen in this overlay image with frames showing the target marker’s location at 4-second intervals. Credit: JAXA

Japan’s Hayabusa 2 spacecraft deployed two target markers Monday above asteroid Ryugu in a rehearsal for the release of the mission’s final landing robot next month.

The robotic asteroid explorer released the two 4-inch (10-centimeter) ball-shaped markers seven minutes apart Monday, after the Hayabusa 2 spacecraft descended to a distance of about 3,300 feet (1 kilometer) fr om Ryugu.

The Japan Aerospace Exploration Agency, or JAXA, released a pair of images showing the target markers, each covered in a reflective film, after their release from Hayabusa 2. The target markers are unpowered and entirely passive objects designed as navigation aids for Hayabusa 2 around the asteroid.

With both target markers away, Hayabusa 2 fired its thrusters to begin an ascent back to a home position farther from the asteroid. Ground teams are in the final stages of planning another descent toward Ryugu in October, during which Hayabusa 2 will deploy the last of four landing robots to the asteroid’s surface.

“We released two target markers from an altitude of about 1 kilometer, and these images were just released,” said Makoto Yoshikawa, Hayabusa 2’s mission manager at JAXA. “The purpose of this release is a rehearsal of the release of the MINERVA-II-2 small rover next month.”

Hayabusa 2’s cameras will track the movement of the two navigation aids as they fly in space around Ryugu over the next several days. Scientists expect Ryugu’s tenuous gravity will pull the target markers to the asteroid’s surface within a week.

“We can observe the target marker’s orbit around Ryugu and we can then determine the gravity field of Ryugu in detail, so this is a new operation,” Yoshikawa said Tuesday in a press briefing at the European Planetary Science Congress.

Hayabusa 2 is in the final phase of its science campaign at asteroid Ryugu, wh ere it arrived in June 2018 after a three-and-a-half year journey from Earth. The spacecraft has conducted two touch-and-go landings on Ryugu — one in February and another in July — to gather pristine asteroid samples for return to Earth.

Last year, Hayabusa 2 deployed three mobile landers to hop around Ryugu. Two MINERVA-II landers, developed in Japan, and a larger robot named MASCOT managed by the German and French space agencies beamed back images and scientific data from Ryugu’s surface.

One more lander remains in Hayabusa 2’s toolkit.

The MINERVA-II-2 mobile lander was developed by a consortium of Japanese universities as a piggyback payload for Hayabusa 2. The robot is smaller than a soccer ball, but carries mechanisms to allow it to move around the asteroid, along with a camera, a thermometer, photodiode, and an accelerometer.

Hayabusa 2 is scheduled to depart Ryugu by the end of this year using plasma engines, aiming for a return to Earth in December 2020, when the craft will release a parachute-equipped re-entry capsule to land in Australia.

Scientists will retrieve the asteroid specimens for detailed analysis.

“If we have 0.1 grams (of material), we can do all the sample analysis, but we hope we will have much more,” Yoshikawa said.

“We want to study the organic matter on Ryugu because we want to know the origin of life on the Earth, and we think Ryugu has original matter that became life,” he said. “So our main purpose is analysis of the organic matter on the surface of Ryugu.”
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