Hayabusa 2 (Хаябуса-2), Procyon – H-IIA F26 – Танэгасима – 03.12.2014 04:22:04 UTC

Автор Космос-3794, 13.08.2010 10:49:07

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tnt22

ЦитироватьHAYABUSA2@JAXA‏ @haya2e_jaxa 40 мин. назад

In the days since our arrival, Hayabusa2 has been confirming the performance of the onboard instruments while maintaining the 20km "home position" from Ryugu. This will prepare us for the next set of observations.

поц

#301
ЦитироватьDLR - English‏Подлинная учетная запись @DLR_en 6 ч.6 часов назад


Something's up at the #DLR Lander Control Center... tomorrow is a big day for the @MASCOT2018 #asteroid lander! Christian Krause, MASCOT Ground Segment and Operations Manager elaborates...
https://twitter.com/i/status/1014866071294304257


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tnt22

https://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10081/151_read-28773/#/gallery/31162
ЦитироватьPreparing for an asteroid landing – the MASCOT Control Center in contact with the MASCOT lander
06 July 2018


MASCOT asteroid lander on board the Hayabusa2 spacecraft
Спойлер

MASCOT Control Centere (MCC)


MASCOT asteroid lander
[свернуть]
    [/li]
  • First signals received from asteroid lander MASCOT upon its arrival at asteroid Ryugu
  • Start of period of intensive landing preparations
  • Cooperation between Germany, France and Japan
  • Focus: Aerospace, exploration, robotics
On 6 July 2018 at 03:15 CEST (01:15 UTC), it was time. The team at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) MASCOT Control Center in Cologne received the first signals from the German-French asteroid lander MASCOT upon its arrival at the near-Earth asteroid Ryugu. On 27 June 2018, the lander reached the asteroid aboard the Japanese space probe Hayabusa2 after a three-and-a-half year journey through space. For the first time this year, the researchers have contact with MASCOT and are presently checking all the on-board systems and instruments. "Now begins the period of intensive landing preparations, because we can only intervene to a limited extent during the landing," says MASCOT Ground Segment and Operations Manager Christian Krause from the DLR Microgravity User Support Center (MUSC).

MASCOT will only be accessible from Earth for a limited number of time windows when landing on Ryugu, with commands to the lander and a response back to Earth taking more than 30 minutes. During the approximately 16-hour-long measurement operation on the surface, MASCOT has to be largely left to its own devices, and the landing exercises and tests on the ground are therefore of particular importance. "We have subjected all of the landing sequences to extensive testing using a ground model of MASCOT," explains Krause. "With the model we can, for example, test the system sequences during movement and realignment, as well as examine the scientific processes of the experiments on board." Since the launch of Hayabusa2 and MASCOT on 3 December 2014, the researchers have, together with JAXA, been working through and refining the landing sequences and instrument calibrations with the ground model. For the most part, they have had to work without much information about the asteroid and make broad assumptions about the surface conditions and reflectivitywhich they can now adapt and refine.

A leap into the unknown
Спойлер
"Our goal is to collect as much data as possible during the landing and the measurement phase. To do this, we must prepare the processes as robustly as possible for the inhospitable and unpredictable environment on the asteroid surface," says MASCOT Project Manager Tra-Mi Ho from the DLR Institute of Space Systems. Four instruments are installed inside the 30 × 30 × 20 centimetre lander, which weighs only 10 kilograms. The mineralogical and geological composition of the asteroid surface will be investigated and the surface temperature and magnetic field of the asteroid determined by means of a radiometer and a camera from DLR, a spectrometer from the Institut d'Astrophysique Spatiale and a magnetometer from TU Braunschweig. MASCOT will receive the necessary kinetic energy for its 'jumping' manoeuvres on the surface via a built-in swing arm. "The instruments and systems will now undergo another health check upon arrival, as they have done each year during the trip to Ryugu," explains Tra-Mi Ho.

The landing site selection for MASCOT is planned for mid-August together with the partners from the French space agency CNES and the Japanese space agency JAXA. "Then it will be very exciting for us at the MASCOT Center before landing, when we refine the landing procedures with the last details," says Christian Krause. "However, even if we know the landing site we have to be prepared for many eventualities, because MASCOT's movement on the surface after the first contact is unpredictable. It is conceivable that MASCOT will come to rest after the first contact with Ryugu." Here the research team uses the flight dynamics calculations of the French colleagues of the CNES, in order to be able to estimate the range of action of MASCOT as accurately as possible. This is also important for the pre-programmed 'jumps' of up to 70 metres in order to perform measurements at various points on the asteroid surface.
[свернуть]
About the Hayabusa2 mission and MASCOT
Спойлер
Hayabusa2 is a Japanese space agency (Japan Aerospace Exploration Agency; JAXA) mission to the near-Earth asteroid Ryugu. The German-French lander MASCOT on board Hayabusa2 was developed by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) and built in close cooperation with the French space agency (Centre National d'Etudes Spatiales; CNES). DLR, the Institut d'Astrophysique Spatiale and Technical of University Braunschweig have contributed the scientific experiments on board MASCOT. The MASCOT lander and its experiments are operated and controlled by DLR with support from CNES and in constant interaction with the Hayabusa2 team.

The DLR Institute of Space Systems in Bremen was responsible for developing and testing the lander together with CNES. The DLR Institute of Composite Structures and Adaptronics in Braunschweig was responsible for the stable structure of the lander. The DLR Robotics and Mechatronics Center in Oberpfaffenhofen developed the swing arm that allows MASCOT to hop on the asteroid. The DLR Institute of Planetary Research in Berlin contributed the MasCam camera and the MARA radiometer. The asteroid lander is monitored and operated from the MASCOT Control Center in the Microgravity User Support Center (MUSC) at the DLR site in Cologne.
[свернуть]

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tnt22

http://www.hayabusa2.jaxa.jp/topics/20180711bje/index.html
Цитироватьリュウグウの形状モデル初期バージョンが完成
(Завершено создание исходной версии модели формы Рюгю)
...


図1 会津大によるリュウグウの形状モデル。
(Рисунок 1 Формальная модель Рюгю. Университет Айзу.)


図2 神戸大によるリュウグウの形状モデル。
(Рисунок 2 Формальная модель Рюгю. Университет Кобе.)

形状モデルチームでは、同じ画像データから、二つの異なった方法で形状モデルを作成しています。一つ目の方法は、Structure-from-Motion(SfM)と呼ばれるステレオ視の手法の一種です。最近よく見かける、ドローンからの空撮の映像から地形や建物の形を作成するのにも用いられています。図1に示されているモデルがこの方法で作成されたものです。もう一つの方法は、Stereophotoclinometry (SPC)と呼ばれるもので、「はやぶさ」探査機が訪問した小惑星イトカワの形状を調べるのにも用いられました。図2に示されているモデルがこの方法で作成されたものです。二つの形状モデルデータを比較することで、リュウグウの形状をどの程度の精度で計測できているかを把握することができます。それぞれ細かい差異はありますが、どちらもそろばんの珠のようなリュウグウの全体形状や、その表面にあるクレーターのような窪地、岩塊が再現できていることがわかります。
(Команда исследователей формирует модели формы из одних и тех же данных изображения двумя различными способами. Первый метод - это тип стереовидения, называемый Structure - from - Motion (SfM). Он используется для создания топографии и построения фигур из фотоизображений с космического аппарата, которые мы видели недавно. Таким образом была создана модель, показанная на рисунке 1. Другой метод, называемый Stereophotoclinometry (SPC), уже использовался для исследования формы астероида Итокава, посещенного зондом Хаябуса. Таким образом была создана модель, показанная на рисунке 2. Сравнивая данные двух геометрических моделей, мы можем понять степень точности измерения формы Рюгю. Хотя есть незначительные различия, можно увидеть, что вся форма Рюгю похожа на шарик на счётах и все кратерные депрессии и массивы горных пород на поверхности могут быть воспроизведены.)

今後の観測により解像度の高い画像が得られるとより詳細なリュウグウの三次元形状を明らかにすることができます。
(Получая новые изображения с высоким разрешением из будущих наблюдений, можно будет более подробно представить трехмерную форму Рюгю.)
...

Проект Hayabusa 2
2018.07.11

tnt22

http://www.hayabusa2.jaxa.jp/topics/20180710je/index_e.html
ЦитироватьThis is Ryugu -- a global image in 3D

Asteroid Ryugu (designation number 162173) is a "spinning top" -type asteroid which was not predicted before the recent images captured by Hayabusa2. A global image of the asteroid as it rotates is shown below as a 3D animation.


[Original file]


[Original file]
Animation of the stereoscopic global image of asteroid Ryugu. When viewed through red / blue glasses (blue filter over the right eye), the asteroid should look three-dimensional. The images were captured with the Optical Navigation Camera - Telescopic (ONC-T), photographed on June 23, 2018.
Image credit ※: JAXA, University of Aizu, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University and AIST.

These animations show the result of sequential images of asteroid Ryugu taken with the ONC-T (Optical Navigation Camera - Telescopic) during the final approach to Ryugu on June 23, 2018. Images were captured at approximately 10 degrees increments as the asteroid rotates. The distance fr om the spacecraft to Ryugu at this time was about 40 km.

If you assemble red-blue glasses (placing the blue filter over your right eye) and look at these figures, Ryugu should appear three dimensional. The overall shape of Ryugu and the undulations of he craters and boulders become very cler.

From here on, we will be investigating Ryugu in more detail.

※ If you wish to use the images here, please include the displayed credit. In the case wh ere an abbreviated form is necessary, please use "JAXA, University of Aizu & collaborators".

Hayabusa2 Project
2018.07.10

tnt22

http://www.hayabusa2.jaxa.jp/topics/20180711je/index_e.html
ЦитироватьThe view of Ryugu fr om the home
position

From the "home position" at 20 km away from asteroid Ryugu, Hayabusa2 has been confirming instrument operations in preparation for future observations. The images below show the results of part of this rehearsal observation.


Figure 1: Asteroid Ryugu photographed with the ONC-T from a distance of about 20 km. The image was taken at around 23:13 JST on June 30, 2018.
Image credit ※: JAXA, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University, University of Aizu and AIST.


Figure 2: Ryugu photographed with the ONC-T from a distance of about 20 km. This image was taken at around 19:21 JST on June 30, 2018. As the asteroid has rotated, this image is almost the reverse side of Figure 1.
Image credit ※: JAXA, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University, University of Aizu and AIST.

※ If you wish to use the images here, please include the displayed credit. In the case wh ere an abbreviated form is necessary, please use "JAXA, University of Tokyo & collaborators".

Hayabusa2 Project
2018.07.11

Denis Voronin

Кривыми должны быть извилины, а не руки.

tnt22

http://www.hayabusa2.jaxa.jp/topics/20180711bje/index_e.html
ЦитироватьInitial version of the shape model
for Ryugu

We previously introduced a global image of asteroid Ryugu, but the Hayabusa2 Project shape model team have also created three-dimensional models of the asteroid. The asteroid was measured using images captured with the ONC-T (Optical Navigation Camera - Telescopic) to form a "shape model" of Ryugu. The shape of Ryugu is fundamental information when considering the formation history of the asteroid and it is also key to future operations by Hayabusa2.

The shape model team have initially used images taken during Hayabusa2's arrival at the asteroid to create the first three-dimensional shape models of Ryugu. This shape models were used in Figures 1 and 2 to show animations of the rotating Ryugu generated using computer graphics.


Figure 1: Shape model of Ryugu by the University of Aizu.
Image credit ※1: University of Aizu, Kobe University (shape model creation), Auburn University (video creation), JAXA.


Figure 2: Shape model of Ryugu by Kobe University.
Image credit ※2: Kobe University, University of Aizu (shape model creation), Auburn University (video creation), JAXA

The shape model team created shape models fr om the same image data in two different ways. The first method shown in Figure 1 is a type of stereoscopic technique called "Structure-from-Motion" (SfM). This is the same method that is used to create terrain and building shapes from aerial images that are commonly seen when taken by a drone. Figure 2 shows the shape model created with a second method known as "stereophotoclinometry" (SPC). This technique was also used to model the shape of asteroid Itokawa, the destination of the first Hayabusa spacecraft. By comparing the two shape models, we can assess how accurately the shape of Ryugu has been replicated. Although the two models show minor differences, both depict a global shape similar to the bead on an abacus, with recesses that look like craters and boulders of rock on the surface.

If higher resolution images of Ryugu are obtained in future observations, the three-dimensional shape of the asteroid can be clarified in greater detail.


※ If you wish to use the images here, please include the displayed credit. In the case wh ere an abbreviated form is necessary, please use ※1 "University of Aizu, JAXA & collaborators" and ※2 "Kobe University, JAXA and collaborators".

Hayabusa2 Project
2018.07.11

tnt22

http://www.hayabusa2.jaxa.jp/topics/operation_e/index.html
ЦитироватьOperation status report

2018/07/12

★ Hayabusa2 status(the week of 2018.7.2) ★
The first week after arriving at Ryugu has gone by in a flash. Monitoring the landscape of a brand-new astronomical object for humanity while continuing spacecraft operations is a wonderful and amazing experience.

The two main activities this week were:
・Establishing the procedure needed to accurately hover 20km above the asteroid.
・An operation check of the observational instruments when directed towards Ryugu.

The outcome of both activities was good. The LIDAR (Laser altimeter) measured the altitude of the asteroid's facing surface and the Ka-band communication equipment started sending high speed data through the NASA Deep Space Network. From the Doppler shift of the radio waves sent from Hayabusa2, we could tell that the spacecraft is feeling the gravity of the asteroid. Hayabusa2's exploration of Ryugu in this first week has been a smooth start.

2018.7.9 Y.T.

tnt22

#312
Объявление
ЦитироватьЗонд «Hayabusa 2» после прибытия к астероиду Рюгю сохраняет положение примерно в 20 км от его поверхности и в настоящее время проводит проверки функционирования различного бортового оборудования.

Запланирован очередной пресс-брифинг о текущем состоянии зонда «Hayabusa 2»

Дата и время: 19 июля 2018 (четверг), 11:00-12:00 (JST)

Предполагаемый состав участников брифинга:
    [/li]
  • Такаши Кубота
    (Институт космической и астронавтической науки JAXA, профессор прикладных инженерных исследований космических аппаратов)
  • Макото Йошикава
    (Институт космической и астронавтической науки JAXA, адъюнкт-профессор прикладных инженерных исследований космических аппаратов)
  • Сейичиро Ватанабе
    (Профессор, Высшая школа экологических исследований, Университет Нагоя)
  • Тацуаки Окада
    (Доцент, Институт космической и астронавтической науки JAXA)
  • Шого Тачибана
    (Профессор Высшей школы науки, Токийский университет)
Трансляция брифинга на ТыТрубе
Цитировать
P.S. Начало брифинга: 02:00 UTC (05:00 ДМВ)

tnt22

Достоверность материала под вопросом:
ЦитироватьAsteroid Ryugu rotation (Shape model)

NEW HORIZONS v2.0

Опубликовано: 10 июл. 2018 г.

Shape model of asteroid Ryugu based on data taken by Hayabusa2 Credit: JAXA / University of Tokyo / Kochi University / Rikkyo University / Nagoya University / Chiba Institute of Technology / Meiji University / University of Aizu / AIST / Roman Tkachenko
https://www.youtube.com/watch?v=7-7xg4XAcIkhttps://www.youtube.com/watch?v=7-7xg4XAcIk (0:33)


tnt22

http://www.hayabusa2.jaxa.jp/topics/operation_e/index.html
ЦитироватьJul. 19, 2018

★ Hayabusa2 status (the week of 2018.7.9) ★

Operations continue at the Home Position (an altitude of about 20km). Overseas stations as well as the Usuda Deep Space Observatory have also been used for the Ka band downlink and uplink transfer. The ONC-T, LIDAR, NIRS3 and TIR have performed BOX-A (20km altitude) observations, continuing our steady data acquisition.

2018.7.16 M.Y.




tnt22