OSIRIS-Rex – Atlas V 411 (AV-067) – Canaveral SLC-41 – 08.09.2016 23:05 UTC

Автор Anatoly Zak, 26.05.2011 08:53:55

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tnt22

ЦитироватьNASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 56 мин. назад

3D-printed versions of the old and new shape models for #asteroid Bennu show how accurate the early, ground-based model actually was. Bennu's size, shape, spin rate and orientation are all very close to what the team predicted. #WelcomeToBennu #AGU18


tnt22

ЦитироватьNASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 59 мин. назад

My close-range images of Bennu are beginning to reveal geological features on the asteroid's surface, such as boulders and craters. Bennu has some rugged terrain to explore. #WelcomeToBennu #AGU18




57 мин. назад

On Dec. 2 at a range of 15 miles (24 km), PolyCam snapped this image showing three different boulder features on Bennu, each circled in white and then magnified. Their widths are about 52 feet (16 m), 115 feet (35 m), and 102 feet (31 m), respectively. #WelcomeToBennu #AGU18

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55 мин. назад

My team is keeping an eye out for areas on Bennu with loose rock and dirt that are potential places to collect a sample. On Dec. 2, PolyCam imaged this crater, which is about 66 feet (20 m) across and appears to have loose material in the bottom. #WelcomeToBennu #AGU18

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tnt22

ЦитироватьNASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 55 мин. назад

Early data fr om Bennu show that I'm exactly wh ere I need to be to achieve our science goals. The biggest surprise so far is the number and size of boulders on Bennu's surface, but my team is more than ready to tackle that challenge. Let the adventure begin! #WelcomeToBennu #AGU18


tnt22

ЦитироватьNASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 36 мин.36 минут назад

Beautiful new shape model of Bennu?
Water bound up in the clay minerals on the asteroid's surface?
Awesome new imagery showing its rugged terrain?

Read more about the discoveries my team has made about Bennu so far: http://bit.ly/BennuSci  #WelcomeToBennu #AGU18

https://video.twimg.com/tweet_video/DuFC9D6WkAAqUEY.mp4

tnt22

https://www.nasa.gov/press-release/nasa-s-newly-arrived-osiris-rex-spacecraft-already-discovers-water-on-asteroid

https://www.asteroidmission.org/?latest-news=nasas-newly-arrived-osiris-rex-spacecraft-already-discovers-water-asteroid
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NASA's Newly Arrived OSIRIS-REx Spacecraft Already Discovers Water on Asteroid

December 10, 2018 - Recently analyzed data fr om NASA's Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer (OSIRIS-REx) mission has revealed water locked inside the clays that make up its scientific target, the asteroid Bennu.


This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on Dec. 2 by the OSIRIS-REx spacecraft from a range of 15 miles (24 km).
Credit: NASA/Goddard/University of Arizona


During the mission's approach phase, between mid-August and early December, the spacecraft traveled 1.4 million miles (2.2 million km) on its journey from Earth to arrive at a location 12 miles (19 km) from Bennu on Dec. 3. During this time, the science team on Earth aimed three of the spacecraft's instruments towards Bennu and began making the mission's first scientific observations of the asteroid. OSIRIS-REx is NASA's first asteroid sample return mission.

Data obtained from the spacecraft's two spectrometers, the OSIRIS-REx Visible and Infrared Spectrometer (OVIRS) and the OSIRIS-REx Thermal Emission Spectrometer (OTES), reveal the presence of molecules that contain oxygen and hydrogen atoms bonded together, known as "hydroxyls." The team suspects that these hydroxyl groups exist globally across the asteroid in water-bearing clay minerals, meaning that at some point, Bennu's rocky material interacted with water. While Bennu itself is too small to have ever hosted liquid water, the finding does indicate that liquid water was present at some time on Bennu's parent body, a much larger asteroid.
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"The presence of hydrated minerals across the asteroid confirms that Bennu, a remnant from early in the formation of the solar system, is an excellent specimen for the OSIRIS-REx mission to study the composition of primitive volatiles and organics," said Amy Simon, OVIRS deputy instrument scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "When samples of this material are returned by the mission to Earth in 2023, scientists will receive a treasure trove of new information about the history and evolution of our solar system."

Additionally, data obtained from the OSIRIS-REx Camera Suite (OCAMS) corroborate ground-based telescopic observations of Bennu and confirm the original model developed in 2013 by OSIRIS-REx Science Team Chief Michael Nolan and collaborators. That model closely predicted the asteroid's actual shape, with Bennu's diameter, rotation rate, inclination, and overall shape presented almost exactly as projected.


This preliminary shape model of asteroid Bennu was created from a compilation of images taken by OSIRIS-REx's PolyCam camera during the spacecraft's approach toward Bennu during the month of November. This 3D shape model shows features on Bennu as small as six meters.
Credit: NASA/Goddard/University of Arizona


One outlier from the predicted shape model is the size of the large boulder near Bennu's south pole. The ground-based shape model calculated this boulder to be at least 33 feet (10 meters) in height. Preliminary calculations from OCAMS observations show that the boulder is closer to 164 feet (50 meters) in height, with a width of approximately 180 feet (55 meters).

Bennu's surface material is a mix of very rocky, boulder-filled regions and a few relatively smooth regions that lack boulders. However, the quantity of boulders on the surface is higher than expected. The team will make further observations at closer ranges to more accurately assess wh ere a sample can be taken on Bennu to later be returned to Earth.

"Our initial data show that the team picked the right asteroid as the target of the OSIRIS-REx mission. We have not discovered any insurmountable issues at Bennu so far," said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona, Tucson. "The spacecraft is healthy and the science instruments are working better than required. It is time now for our adventure to begin."

The mission currently is performing a preliminary survey of the asteroid, flying the spacecraft in passes over Bennu's north pole, equator, and south pole at ranges as close as 4.4 miles (7 km) to better determine the asteroid's mass. The mission's scientists and engineers must know the mass of the asteroid in order to design the spacecraft's insertion into orbit because mass affects the asteroid's gravitational pull on the spacecraft. Knowing Bennu's mass will also help the science team understand the asteroid's structure and composition.

This survey also provides the first opportunity for the OSIRIS-REx Laser Altimeter (OLA), an instrument contributed by the Canadian Space Agency, to make observations, now that the spacecraft is in proximity to Bennu.

The spacecraft's first orbital insertion is scheduled for Dec. 31, and OSIRIS-REx will remain in orbit until mid-February 2019, when it exits to initiate another series of flybys for the next survey phase. During the first orbital phase, the spacecraft will orbit the asteroid at a range of 0.9 miles (1.4 km) to 1.24 miles (2.0 km) from the center of Bennu — setting new records for the smallest body ever orbited by a spacecraft and the closest orbit of a planetary body by any spacecraft.

Goddard provides overall mission management, systems engineering and the safety and mission assurance for OSIRIS-REx. Dante Lauretta of the University of Arizona, Tucson, is the principal investigator, and the University of Arizona also leads the science team and the mission's science observation planning and data processing. Lockheed Martin Space Systems in Denver built the spacecraft and is providing flight operations. Goddard and KinetX Aerospace are responsible for navigating the OSIRIS-REx spacecraft. OSIRIS-REx is the third mission in NASA's New Frontiers Program. NASA's Marshall Space Flight Center in Huntsville, Alabama, manages the agency's New Frontiers Program for the Science Mission Directorate in Washington.
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tnt22

ЦитироватьChris B - NSF‏ @NASASpaceflight 7 мин. назад

ARTICLE:
OSIRIS-REx finds water on asteroid Bennu -

https://www.nasaspaceflight.com/2018/12/osiris-rex-water-asteroid-bennu/ ...

- By Chris Gebhardt (@ChrisG_NSF)

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tnt22

https://tass.ru/kosmos/5896079
Цитировать11 ДЕК, 01:04
Аппарат OSIRIS-REx нашел на астероиде Бенну следы воды

Речь идет о "гидросодержащих минералах", отметили в NASA


Зонд OSIRIS-REx у астероида Бенну
© NASA/Goddard/University of Arizona via AP

ВАШИНГТОН, 11 декабря. /ТАСС/. Космический аппарат OSIRIS-REx обнаружил следы воды на исследуемом им астероиде Бенну. Об этом сообщило в понедельник Национальное управление США по аэронавтике и исследованию космического пространства (NASA).

Речь идет о "гидросодержащих минералах", уточнила научный сотрудник Центра космических полетов имени Годдарда в Гринбелте (штат Мэриленд) Эми Саймон. Это учреждение входит в структуру NASA и вместе с еще несколькими американскими научными центрами занимается реализацией проекта OSIRIS-REx. Как отметило NASA, о том, что на астероиде Бенну есть вода, свидетельствуют "данные, собранные двумя спектрометрами" автоматической станции OSIRIS-REx. Эти приборы выявили наличие на астероиде гидроксилов, или водных остатков, заявило американское космическое ведомство.

По его свидетельству, специалисты, привлеченные к поддержке миссии аппарата OSIRIS-REx, подозревают, что гидроксилы имеются на астероиде Бенну повсюду. Это означает, что, вероятно, когда-то в прошлом вода присутствовала на том более крупном астрономическом объекте, от которого откололся астероид Бенну, пояснило NASA. Его эксперты подчеркнули, что в силу малых размеров астероида Бенну на нем самом воды в жидком виде не было.

О проекте
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Зонд OSIRIS-REx, выведенный в космос в сентябре 2016 года, оснащен несколькими приборами, в том числе фотокамерами, спектрометрами и лазерным высотомером. Аппарат пролетел 2,2 млн км и 3 декабря приблизился к астероиду Бенну на 19 км. Планируется, что затем будет предпринята операция по захвату грунта на астероиде с помощью руки-манипулятора, снабженной специальным пневматическим устройством. В общей сложности сотрудники NASA рассчитывают собрать от 60 г до 2 кг астероидного грунта.

Одна из главных целей этого проекта - получение новых данных о строении и составе астероидов, представляющих потенциальную опасность для нашей планеты. Впоследствии эти сведения могут быть использованы при организации специальных миссий по предотвращению астероидной угрозы. Предполагается, что пробу грунта на астероиде аппарат возьмет в середине 2020 года. А возвращение на Землю спускаемой капсулы зонда намечается на сентябрь 2023 года.

Как ожидается, изучение этой пробы грунта поможет ученым и лучше понять, как протекало формирование Солнечной системы.

Бенну диаметром около 550 м вращается по эллиптической орбите вокруг Солнца. Астрономы относят его к Аполлонам - астероидам, орбиты которых пересекают орбиту Земли. Вероятность столкновения с ним составляет 1 к 4000. Его падение на Землю было бы эквивалентно взрыву мощностью 2700 мегатонн.

OSIRIS-REx является одним из трех аппаратов, созданных экспертами NASA для запуска в дальний космос по программе New Frontiers. Два других - это межпланетная станция New Horizons, пролетевшая в 2016 году на близком расстоянии от Плутона, и автоматическая межпланетная станция Juno, при помощи которой ведутся исследования Юпитера.
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Theoristos

... Тот случай, когда последнее слово всё портит.

tnt22

ЦитироватьLIVE – NASA's Welcome to Bennu press conference

Canadian Space Agency

Прямой эфир: 10 дек. 2018 г.
https://www.youtube.com/watch?v=WRCzK8uZvoYhttps://www.youtube.com/watch?v=WRCzK8uZvoY (55:32)

tnt22

ЦитироватьWelcome to Bennu Press Conference - First Mission Science Results

OSIRIS-REx Mission

Опубликовано: 12 дек. 2018 г.

At the AGU Fall 2018 meeting, members of the OSIRIS-REx science team shared highlights of their initial up-close studies of the asteroid. Highlights include: detection of water bound up in the clay minerals on the asteroid's surface, a new shape model, and new high-resolution images.
https://www.youtube.com/watch?v=qaPHXXZTkAU&feature=youtu.behttps://www.youtube.com/watch?v=qaPHXXZTkAU&feature=youtu.be (47:00)

tnt22

https://www.asteroidmission.org/bennunorthpolepassdec4/
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Bennu North Pole Flyover

This series of MapCam images was taken over the course of about four hours and 19 minutes on Dec. 4, 2018, as OSIRIS-REx made its first pass over Bennu's north pole. The images were captured as the spacecraft was inbound toward Bennu, shortly before its closest approach of the asteroid's pole. As the asteroid rotates and grows larger in the field of view, the range to the center of Bennu shrinks from about 7.1 to 5.8 miles (11.4 to 9.3 km).

This first pass was one of five flyovers of Bennu's poles and equator that OSIRIS-REx conducted during its Preliminary Survey of the asteroid.

Date Taken: Dec. 4, 2018

Instrument Used: OCAMS (MapCam)

Credit: NASA/Goddard/University of Arizona

tnt22

ЦитироватьNASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 23 дек.

Bennu's small size (~500 m or 1,600 ft in diameter) and low gravity make navigating around the asteroid very challenging. In fact, Bennu will become the smallest planetary object ever orbited by a spacecraft when I begin orbiting it for the first time on Dec. 31. #NYE2019


tnt22

ЦитироватьScience in Seconds: OSIRIS-REx & New Horizons

OSIRIS-REx Mission

Опубликовано: 23 дек. 2018 г.

Two missions. Two small worlds. Untold discoveries await. As 2018 draws to close, NASA's OSIRIS-REx and New Horizons missions are exploring two never-before-visited small bodies: asteroid Bennu and Kuiper belt object Ultima Thule.
https://www.youtube.com/watch?v=I7IDM7Cm3LYhttps://www.youtube.com/watch?v=I7IDM7Cm3LY (1:01)

tnt22

ЦитироватьNASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 59 мин. назад

Big milestone coming up! On #NYE19,when I go into orbit around Bennu, I'll break two records: the smallest body ever orbited by a spacecraft and the closest orbit of a planetary body by any spacecraft. For updates, follow @UALPL and keep an eye on http://asteroidmission.org 


tnt22

Ответ к #354

ЦитироватьKinetX SNAFD‏ @KinetXSNAFD 4 ч. назад

Today our #orexnav team is finalizing the parameters for tomorrow's orbit insertion burn!

tnt22

ЦитироватьKinetX SNAFD‏ @KinetXSNAFD 17 мин. назад

@OSIRISREx has now crossed closer to Bennu than ever before: 4.4 miles (7km) and closing on orbit insertion target.



tnt22

ЦитироватьCanberraDSN‏Подлинная учетная запись @CanberraDSN 30 мин. назад

Great way to end one year and start another.

Tonight #NYE2019, @NASA's @OSIRISREx spacecraft enters orbit at asteroid #Bennu

Then on New Year's Day, @NASANewHorizons aka @NewHorizons2015 makes its historic #UltimaFlyby of #KuiperBelt object #2014MU69 aka #UltimaThule.


tnt22

ЦитироватьKinetX SNAFD‏ @KinetXSNAFD 6 ч. назад

Orbit insertion burn design has been finalized: @OSIRISREx will fire its thrusters to enter orbit about Bennu at 19:43:55 UTC (14:43:55 EST) tomorrow, December 31st! The engines will burn for 8 seconds.

https://video.twimg.com/ext_tw_video/1079618709369409537/pu/vid/1280x720/GShislATJrHcQZK-.mp4?tag=6

tnt22

ЦитироватьArrival at Asteroid Bennu

OSIRIS-REx Mission

Опубликовано: 29 дек. 2018 г.

On Dec. 3, 2018, the OSIRIS-REx spacecraft arrived at its destination: an ancient near-Earth asteroid called Bennu. Members of the mission team reflect on what we will learn by collecting a sample from Bennu, the milestones the mission has reached so far, and the challenges ahead.

Credit: NASA's Goddard Space Flight Center
https://www.youtube.com/watch?v=f0mNByndvQUhttps://www.youtube.com/watch?v=f0mNByndvQU (6:39)

tnt22

https://spaceflightnow.com/2018/12/31/osiris-rex-bennu-orbit-insertion/
ЦитироватьOSIRIS-REx ready for New Year's Eve orbit insertion burn at asteroid
December 31, 2018Stephen Clark


This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on Dec. 2 by the OSIRIS-REx spacecraft fr om a range of 15 miles (24 kilometers). Credits: NASA/Goddard/University of Arizona

After four weeks of navigating in the vicinity of asteroid Bennu, NASA's OSIRIS-REx spacecraft is set to fire its thrusters for eight seconds Monday to slip into orbit around the carbon-rich object, making Bennu the smallest planetary body ever orbited by a spacecraft.

OSIRIS-REx arrived at Bennu on Dec. 3, ending a journey fr om Earth that lasted more than two years and spanned 1.2 billion miles (2 billion kilometers). Since then, the robotic spacecraft has surveyed the 1,600-foot-wide (492-meter) asteroid through a series of flybys as close as 4.4 miles (7 kilometers) over Bennu's north pole, south pole and equator to measure the asteroid's gravitational tug on OSIRIS-REx, which will help scientists determine the object's mass.

The mass estimate helped navigators refine the parameters of OSIRIS-REx's maneuver to enter orbit around Bennu. The craft's thrusters will ignite for 8 seconds at 2:43:55 p.m. EST (1943:55 GMT) Monday to slightly adjust OSIRIS-REx's velocity, nudging it just enough for Bennu's tenuous gravity to capture the probe into orbit.

Launched in September 2016, NASA's $1 billion Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer was built to travel to Bennu and collect samples for return to Earth.

When the solar system formed more than 4.5 billion years ago, chunks of rock and ice collided as they circled the sun like the balls on a billiard table, eventually building up planets. The leftovers became asteroids and comets, and scientists believe Bennu still harbors the basic carbon-bearing organic molecules that were present in the early solar solar system, the stuff that may have helped seed life.

The spacecraft carries three cameras — one for long-range viewing, a color camera for mapping, and another imager to take pictures as OSIRIS-REx collects samples from the asteroid's surface. The rest of OSIRIS-REx's suite of science instruments includes a thermal emission spectrometer to detect heat coming from the asteroid, a visible infrared spectrometer to locate minerals and organic materials, a laser altimeter provided by the Canadian Space Agency to create topographic maps, and a student-built X-ray spectrometer to identify individual chemical elements present on the asteroid.

Besides revealing Bennu with high-resolution images, OSIRIS-REx has already made discoveries at the asteroid.

Data gathered by thermal emission and visible infrared spectrometer instruments — OTES and OVIRS — indicates clay minerals on the asteroid's surface contain hydroxyl molecules with oxygen and hydrogen molecules bonded together. This finding suggests Bennu's surface was once in contact with water, likely when the asteroid was part of a much larger parent body that was smashed to bits in a collision in the chaotic early solar system.
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An artist's concept of OSIRIS-REx at Bennu. Credit: Lockheed Martin

"The presence of hydrated minerals across the asteroid confirms that Bennu, a remnant from early in the formation of the solar system, is an excellent specimen for the OSIRIS-REx mission to study the composition of primitive volatiles and organics," said Amy Simon, OVIRS deputy instrument scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "When samples of this material are returned by the mission to Earth in 2023, scientists will receive a treasure trove of new information about the history and evolution of our solar system."

"Our initial data show that the team picked the right asteroid as the target of the OSIRIS-REx mission. We have not discovered any insurmountable issues at Bennu so far," said Dante Lauretta, OSIRIS-REx principal investigator at the University of Arizona, Tucson. "The spacecraft is healthy and the science instruments are working better than required. It is time now for our adventure to begin."

The first high-resolution images of Bennu taken by OSIRIS-REx revealed a miniature world containing a few relatively smooth regions without many large rocks, interspersed with boulder-filled regions that might be treacherous for the spacecraft's sample collection touch-and-go maneuver.

One prominent feature of Bennu's landscape is a large boulder protruding from the surface near the south pole. While ground-based radar images suggested the boulder to be at least 33 feet, or 10 meters, in height, OSIRIS-REx imagery indicates is closer to 164 feet, or 50 meters, tall with a width of approximately 180 feet, or 55 meters, according to NASA.

On approach to Bennu, ground controllers at Lockheed Martin in Denver — wh ere OSIRIS-REx was built — unlatched the probe's robotic arm from its launch restraint for the first time. Over several days, the ground team commanded the arm to bend its joints and jettison a launch cover over the sample collection mechanism, which will release compressed air during a touch-and-go maneuver to force gravel and surface material into an on-board chamber for the journey back to Earth.


This mosaic compares the size of asteroid Bennu, to scale, with other asteroids and comets visited by spacecraft. Credit: NASA/University of Arizona/ESA/JAXA

Due to the asteroid's weak gravity, OSIRIS-REx will move around Bennu at a speed of just one-tenth of a mile per hour, or about 5 centimeters per second, once in orbit. The spacecraft's first orbital phase will last until mid-February, when OSIRIS-REx will again make a series of flybys of Bennu.

During the mission's first orbital phase, OSIRIS-REx will orbit the asteroid at a range of 0.9 miles (1.4 km) to 1.24 miles (2.0 km) from the center of Bennu, setting another record for the closest distance any spacecraft has orbited to a planetary body, according to a Dec. 10 statement by NASA.

Orbital speeds are determined by the gravitational pull of the parent planet or star. For comparison, objects in low Earth orbit have to travel at around 17,500 mph (7.8 kilometers per second) to avoid falling back into the atmosphere.

"It's Bennu's size and small mass that make the navigation challenges on this mission unprecedented, really," said Michael Moreau, OSIRIS-REx flight dynamics system manager at NASA's Goddard Space Flight Center, in a conference call with reporters in August.

Comet 67P/Churyumov-Gerasimenko, which was orbited by the European Space Agency's Rosetta spacecraft from 2014 through 2016, is between five and 10 times larger than Bennu, depending on how you measure. Asteroid Ryugu, wh ere Japan's Hayabusa 2 spacecraft is currently exploring, is nearly twice the size of Bennu, and Hayabusa 2 will not enter orbit around it.

OSIRIS-REx will orbit and explore Bennu for more than a year, allowing scientists and mission planners to examine the asteroid and determine a safe location for the craft's touch-and-go descent in July 2020 to snag samples from the asteroid. The spacecraft will depart Bennu and head back to Earth, releasing its sample carrier for re-entry and landing in Utah in September 2023.

Scientists will take the samples to an ultra-clean facility at NASA's Johnson Space Center in Houston for detailed analysis.
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