Hayabusa-2 doleciała do Ryugu 27.06. sonda
Hayabusa-2 doleciała do planetki
Ryugu.
http://lk.astronautilus.pl/n180616.htm#03Hayabusa 2 dotarła do planetoidy Ryugu BY MICHAŁ MOROZ ON 27 CZERWCA 2018
Hayabusa2 przy planetoidzie - wizja artystyczna / Credit: JAXA27 czerwca japońska sonda kosmiczna Hayabusa 2 dotarła do celu misji – planetoidy 162173 Ryugu.
Hayabusa 2 to następczyni misji Hayabusa, która 13 czerwca 2010 roku, jako pierwsza w historii, sprowadziła na Ziemię próbki planetoidy (25143 Itokawa, typu spektralnego S). Celem Hayabusa 2 jest sprowadzenie próbek kolejnej planetoidy, tym razem typu C, oznaczanej jako (162173) 1999 JU3. Została ona odkryta w 1999 roku w ramach programu LINEAR i ma około 1 kilometra średnicy. W 2015 roku w ramach konkursu wyłoniono nazwę dla niej nazwę: Ryugu.
Sonda została wystrzelona w grudniu 2014 roku. Po ponad trzech latach lotu Hayabusa 2 znajduje się coraz bliżej celu. Pod koniec lutego wykonała pierwsze zdjęcia Ryugu, wówczas z ponad 1,3 miliona kilometrów odległości. Kolejne obserwacje zostały przeprowadzone pomiędzy 11 a 14 maja. Wówczas to “star trackery” Hayabusy 2 wykonały obserwacje planetoidy z odległości mniejszej niż 80 tysięcy km.
Podczas ostatniego etapu podróży w czerwcu 2018, obserwacje planetoidy były wykonywane regularnie, a japońska agencja kosmiczna JAXA co kilka dni publikowała nowe zdjęcia i nagrania ukazujące Ryugu. Oczom ukazał się kształt przypominający kostkę do gry, pokryty kraterami oraz głazami na powierzchni. Planetoida ma około 1 km średnicy szerokości.
27 czerwca formalnie zakończyła się trwająca trzy i pół roku podróż. Sonda dotarła do punktu znajdującego się 20 km od Ryugu, i po raz dziesiąty przeprowadziła odpalenie silników korekcyjnych. Z tej okazji zwołana została specjalna konferencja prasowa japońskiej agencji kosmicznej, na której pokazano najdokładniejsze dotychczas obrazy planetoidy.
Ryugu widziana z 22 km / JAXAW najbliższym czasie przeprowadzona zostanie dokładniejsza kampania obserwacji planetoidy, która pozwoli sondzie zbliżyć się na mniejszą odległość a następnie pobranie próbek. Będzie to przeprowadzony przy pomocy specjalnego manipulatora. Ponadto, na pokładzie sondy znajduje się mały impaktor o nazwie Small Carry-on Impactor (SCI). Wewnątrz SCI zainstalowano 4,5 kg ładunku wybuchowego, który wytworzy mały krater na powierzchni Ryugu, dzięki czemu możliwe będzie pobranie próbek skał nie wystawionych na działanie próżni i promieniowania słonecznego oraz kosmicznego.
Na pokładzie znajduje się także lądownik o nazwie MASCOT (Mobile Asteroid Surface Scout). Został on zbudowany przez Niemiecką Agencję Kosmiczną (DLR) przy współpracy z Francuską Agencją Kosmiczną (CNES). MASCOT ma masę 10 kg i pewne możliwości poruszania się po powierzchni planetoidy.
(JAXA, PFA)
https://kosmonauta.net/2018/06/hayabusa-2-dotarla-do-planetoidy-ryugu/Hayabusa2 Rendezvous with RyuguJune 27, 2018 (JST)
National Research and Development Agency
Japan Aerospace Exploration Agency (JAXA)
The location of Hayabusa2 thrusters
A set of 12 thrusters is loaded with the Hayabusa2 spacecraft as circled in red.
Propulsion at 2.9 cm/s in the plus z-axis proceeded for the rendezvous.JAXA confirmed Hayabusa2, JAXA's asteroid explorer rendezvoused with Ryugu, the target asteroid.
On June 27, 2018, JAXA operated Hayabusa2 chemical propulsion thrusters for the spacecraft's orbit control.*
The confirmation of the Hayabusa2 rendezvous made at 9:35 a.m. (Japan Standard Time, JST) is based on the following data analyses;
・The thruster operation of Hayabusa2 occurred nominally
・The distance between Hayabusa2 and Ryugu is approximately 20 kilometers
・Hayabusa2 is able to maintain a constant distance to asteroid Ryugu
・The status of Hayabusa2 is normal
From this point, we are planning to conduct exploratory activities in the vicinity of the asteroid, including scientific observation of asteroid Ryugu and surveying the asteroid for sample collection.
*Hayabusa2 operation hours: 7:00 a.m. (JST) through 3:00 p.m. (JST), June 27. The thruster operation was pre-programmed in the event sequence earlier on the day and the command was automatically executed. (...)
http://global.jaxa.jp/press/2018/06/20180627_hayabusa2.htmlJapan's Hayabusa2 space explorer reaches asteroid to find signs of lifeSource: Xinhua 2018-06-27 18:20:19
TOKYO, June 27 (Xinhua) -- Japanese space explorer Hayabusa2 reached its intended destination Wednesday near a small asteroid, roughly 300 million km from the earth, after traveling for more than three years, Japan's space agency said.
According to the agency, the 600-kg Hayabusa2, which was launched from the Tanegashima Space Center in southwestern Japan in December 2014, has experienced no problems throughout its journey totaling 3.2 billion km.
The space explorer is currently about 20 km above the small asteroid named Ryugu, the Japan Aerospace Exploration Agency (JAXA), said.
The agency said Hayabusa2 is scheduled to make three landings on the asteroid and collect rock samples and will stay close to Ryugu for one and a half years.
During this time, it will conduct a number of exploratory activities in an attempt to find clues about the solar system's evolution and the beginning of life itself, according to JAXA.
The unmanned space explorer is loaded with equipment and devices, including sensors and cameras, and will deploy these to study and monitor the asteroid's temperature, gravity and surface conditions, the agency said.
It also said it is equipped with three miniature rovers which can roam the surface of the asteroid and conduct close-up probes.
In addition, Hayabusa2's 2-kg "impactor" can be dropped to the asteroid's surface to expose and obtain fresh materials.
Hayabusa2's mission will be completed when it returns to the Earth in 2020 with the samples of rocks it has collected from Ryugu, which is thought, unlike the asteroid probed by its predecessor, to contain water and other materials that could possibly support life.
http://www.xinhuanet.com/english/2018-06/27/c_137284614.htmJapan space probe reaches asteroid in search for origin of lifeJune 27, 2018
The probe was launched in 2014A Japanese probe has reached an asteroid 300 million kilometres away to collect information about the birth of the solar system and the origin of life after a more than three-year voyage through deep space.
The Hayabusa2 probe successfully settled into an observation position 20 kilometres (12 miles) above the Ryugu asteroid, officials from the Japan Aerospace Exploration Agency (JAXA) said Wednesday.
Researchers broke out into cheers when the probe arrived in place, a feat JAXA described as "shooting from Japan at a six centimetre target in Brazil".
"Today, we are at the beginning of a space science exploration that is unprecedented for humankind," project manager Yuichi Tsuda told reporters.
The successful mission came just days before the UN's International Asteroid Day on June 30, a global event to raise awareness about the hazards of an asteroid impact and technological progress to counter such a threat.
Scientists hope to glean clues about what gave rise to life on Earth from samples taken from Ryugu, which is thought to contain relatively large amounts of organic matter and water.
Photos of Ryugu—which means "Dragon Palace" in Japanese, a castle at the bottom of the ocean in an ancient Japanese tale—show an asteroid shaped a bit like a spinning top with a rough surface. (...)
The Hayabusa2 mission costs 30 billion yen ($274 million) and the probe was launched in December 2014. It will stay with the asteroid for 18 months before heading back to Earth with its samples.
Its total flight time was 1,302 days and it cruised 3.2 billion kilometres through space on a circuitous route to get to its target, Tsuda told reporters.
To collect its samples, it will release an "impactor" that will explode above the asteroid, shooting a two kilo (four pound) copper object into the surface to excavate a crater a few metres in diameter. (...)
https://phys.org/news/2018-06-japan-space-probe-asteroid-life.html#jCpJapanese spacecraft reaches asteroid after three-and-a-half-year journeyJune 28, 2018 Stephen Clark
Engineers and scientists oversee the final phase of Hayabusa 2’s arrival at asteroid Ryugu from a control center in Sagamihara, Japan. Credit: JAXA/ISASThe asteroid completes one rotation every 7.6 hours, and its orbit takes it around the sun once every 1.3 years. Ryugu’s orbit crosses the path of Earth around the sun, making it a potentially hazardous asteroid.
“On the other hand, there is a peak in the vicinity of the equator and a number of large craters, which makes the selection of the landing points both interesting and difficult,” Tsuda wrote.
The shape of Ryugu also suggests it may have an uneven gravity field, which is estimated to be around 60,000 times weaker than Earth’s, according to Tsuda.
“The project team is fascinated by the appearance of Ryugu and morale is rising at the prospect of this challenge,” Tsuda wrote. “Together with all of you, we have become the first eyewitnesses to see asteroid Ryugu. I feel this amazing honor as we proceed with the mission operations.”
All of Hayabusa 2’s science instruments are functioning as designed. The sensors include a camera suite, a laser designed to measure topography, and a near-infrared spectrometer to study Ryugu’s composition.
“At the end of July we will approach to within 5 kilometers (3 miles) of the surface, so we will have much more detailed surface images,” said Makoto Yoshikawa, Hayabusa 2’s mission manager, in an interview with Spaceflight Now earlier this month. “Also, in August, we will measure the gravity of Ryugu, and in that case we will send the spacecraft down to 1 kilometer (about 3,300 feet) from the surface.” (...)
https://spaceflightnow.com/2018/06/28/japanese-spacecraft-reaches-asteroid-after-three-and-a-half-year-journey/Hayabusa-2 – Asteroid Exploration Mission
Image: JAXA(...) The MASCOT lander is designed to be able to hop from one location to another using a mobility system that will allow it to collect data from several locations while its battery lasts which is expected to be around 12 to 16 hours. The lander measures 0.3 by 0.3 by 0.2 meters in size with a mass of 10 Kilograms containing a number of subsystems including four instruments – a wide-angle camera, an imaging infrared spectrometer, a radiometer payload, and a magnetometer. Data from the instruments will significantly enhance the overall science return from the Hayabusa 2 mission, providing extensive in-situ data from the surface of an asteroid. The science payload has a mass of around 3 Kilograms. (...)
http://spaceflight101.com/spacecraft/hayabusa-2/http://www.abc.net.au/news/science/2018-06-27/hayabusa-2-spacecraft-is-about-to-arrive-at-ryugu/9911680http://space.skyrocket.de/doc_sdat/hayabusa-2.htm
Wątek: Hayabusa 2 (Przeczytany 361438 razy)