OSIRIS REx Asteroid sample and return mission

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OSIRIS REx Asteroid sample and return mission

Unread postby allynh » Tue Sep 12, 2017 10:04 pm

I missed this. I saw the documentary on my local PBS station. People need to watch this. They will be at the asteroid in 2018. Watch the video and notice all the assumptions they are making. Let me know if this has already been talked about by the Team. The Team definitely needs to follow this.

This is the documentary on YouTube:

OSIRIS REx: Countdown to Launch
https://www.youtube.com/watch?v=GeYiI3OlUNY

This the Arizona Public Media.

OSIRIS-REx: Countdown to Launch
https://tv.azpm.org/osirisrex/

This is the NASA site.

OSIRIS-REx
https://www.nasa.gov/osiris-rex

Wiki - OSIRIS-REx
The Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx) is a NASA asteroid study and sample return mission.[5][6][7][8] Launched on 8 September 2016, its mission is to study asteroid 101955 Bennu, a carbonaceous asteroid, and return a sample to Earth in 2023 for detailed analysis. The material returned is expected to enable scientists to learn more about the formation and evolution of the Solar System, its initial stages of planet formation, and the source of organic compounds that led to the formation of life on Earth.[9] If successful, OSIRIS-REx will be the first US spacecraft to return samples from an asteroid.

The cost of the mission will be approximately US$800 million[10] not including the Atlas V launch vehicle, which is about US$183.5 million.[11] It is the third planetary science mission selected in the New Frontiers program, after Juno and New Horizons. The Principal Investigator is Dante Lauretta from the University of Arizona.

. . .

After traveling for approximately two years, the spacecraft is to rendezvous with asteroid 101955 Bennu in 2018 and begin 505 days of surface mapping at a distance of approximately 5 km (3.1 mi).[1] Results of that mapping will be used by the mission team to select the site from which to take a sample of the asteroid's surface.[13] Then a close approach (without landing) will be attempted to allow extension of a robotic arm to gather the sample.[14]


Wiki - 101955 Bennu
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Re: OSIRIS REx Asteroid sample and return mission

Unread postby D_Archer » Wed Sep 13, 2017 12:38 am

How are they going to scoop up a piece of rock?

Maybe they expect loose dust and pick that up?

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Daniel
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Re: OSIRIS REx Asteroid sample and return mission

Unread postby comingfrom » Thu Sep 14, 2017 12:14 am

Let us hope OSIRIS REx their theories. :D
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Re: OSIRIS REx Asteroid sample and return mission

Unread postby allynh » Thu Sep 28, 2017 2:31 pm

They used an Earth flyby to slingshot the probe toward Bennu. They took a picture of the Earth along the way.

OSIRIS-REx probe snaps Earth photo on way to space mining adventure
http://www.pbs.org/newshour/rundown/osi ... adventure/
Nsikan Akpan
September 26, 2017

An image of Earth taken by the OSIRIS-REx MapCam on Sept. 22. The view shows the Pacific Ocean, with Australia in the lower left and Baja California and the southwestern U.S. in the upper right. The dark streaks at the top are due to short photo exposure times, which are need to capture an object as bright as Earth. Photo by NASA's Goddard Space Flight Center/University of Arizona

An image of Earth taken by the OSIRIS-REx MapCam on Sept. 22. The view shows the Pacific Ocean, with Australia in the lower left and Baja California and the southwestern U.S. in the upper right. The dark streaks at the top are due to short photo exposure times, which are need to capture an object as bright as Earth. Photo by NASA’s Goddard Space Flight Center/University of Arizona

Looking at Earth from 106,000 miles miles away, it’s easy to forget the complexity of our planet and the 7.5 billion people that live there. A new image from NASA’s OSIRIS-REx probe offers such a vantage point.

The photo was captured during OSIRIS-REx’s flyby of Earth on Friday. The probe, which passed within 11,000 miles of Earth, needed a boost from the planet’s gravity to reach the orbital plane of its destination: the near-Earth asteroid Bennu.

Asteroid Bennu’s orbit around the Sun is tilted at a six-degree inclination (or angle) from Earth’s orbit. On Sept. 22, the OSIRIS-REx spacecraft will use the Earth’s gravity to boost itself onto Bennu’s orbital plane. Photo by University of Arizona

Asteroid Bennu’s orbit around the Sun is tilted at a six-degree inclination (or angle) from Earth’s orbit. On Sept. 22, the OSIRIS-REx spacecraft used the Earth’s gravity to boost itself onto Bennu’s orbital plane. Photo by University of Arizona

OSIRIS-REx will reach Bennu in 2018, where it will spend a year mapping the surface of the carbon-rich rock. Scientists hope to ultimately land the probe on Bennu with the aim to collect two ounces of the asteroid, which may offer clues to the origins of the solar system.

The mission will also beam back calculations of Bennu’s orbit, given the asteroid has a relatively high probability of impacting Earth in the late 22nd century. The probe aims to return its rock collection to Earth by 2023.

For now, you can scope out this shot for our planet taken by the space miner. The dark streaks at the top are due to the short exposure times — less than three milliseconds — that are needed to take a photo of an object as bright as the Earth.

I found this older article from 2015 on the Newshour.

How do you vacuum an asteroid traveling 63,000 mph?
http://www.pbs.org/newshour/rundown/nas ... oid-bennu/
Catherine Woods
June 30, 2015

This artist's rendering illustrates the spacecraft OSIRIS-REx, which will extend its robotic arm, TAGSAM, to vacuum up a sample from the asteroid Bennu. Photo by National Aeronautics and Space Administration

This artist’s rendering illustrates the spacecraft OSIRIS-REx, which will extend its robotic arm, TAGSAM, to vacuum up a sample from the asteroid Bennu.
Photo by National Aeronautics and Space Administration

Today is National Asteroid Day, and to celebrate, we’re going to fast forward to 2018, when the OSIRIS-REx spacecraft is slated to vacuum up the first asteroid sample ever collected and return the rock dust to Earth. And if all goes as planned, the spacecraft will return that sample in 2023. Why the seven-year journey?

Searching for the perfect asteroid to visit is no easy task. And Bennu, the chosen asteroid, had to satisfy a lot of requirements, including what scientists at NASA call low eccentricity and inclination.

If a planet or asteroid like Bennu moves in a circular orbit, remaining an equal distance from the sun at all times, it has zero eccentricity. But if an asteroid’s orbit is more of an ellipse – meaning its distance from the sun varies during a single orbit – that’s known as high eccentricity.

Video courtesy of NASA

And high eccentricity can be a tricky thing. Since the OSIRIS-REx spacecraft relies in part on solar power, it can never stray too far from the sun. But too close to the sun, and it can’t stand the heat. Just like Earth, Bennu has very low eccentricity which makes it a perfect ‘not too hot, not too cold’ destination.

Our solar system exists on a flat plane. The spacecraft’s trajectory must bend toward Bennu when it jets off the Earth, angling it’s path slightly off the Earth’s plane. Because bending the trajectory requires a lot of energy, “we will do what is called an Earth-gravity assist,” said University of Arizona planetary scientist Dante Lauretta, NASA’s lead scientist on the mission. The spacecraft will first fly under Antarctica and use Earth’s gravity to make a six-degree change before pushing off toward Bennu. “It would take a lot more energy to bend farther away,” Lauretta said.

Bennu orbits the sun at 63,000 mph. To intercept the rock, OSIRIS-REx will race toward it at a pace of 12,000 mph, but then slow down to a crawl, approaching Bennu at less than half a mile per hour. After its 2016 launch, it will take two years to reach the asteroid.

Once OSIRIS-REx is within three miles of Bennu, it will collect a detailed map of the asteroid’s surface, which extends roughly the size of four football fields. NASA’s scientist will then determine where it is safe for OSIRIS-REx to extend its 10 foot robotic arm and vacuum up a two ounce sample, without landing and risking damage to the spacecraft.

When dreaming up a way to collect a sample from Bennu, scientists brainstormed the use of many tools – shovels, drills, claws and scoops. But each had its downside. “In the microgravity environment, it is really hard for those tools to work. We thought wouldn’t it be great if we just had a vacuum cleaner?” Lauretta said.

But Bennu already exists in a vacuum – there is no gravity or atmosphere. So the team designed a space vacuum called TAGSAM or “touch and go acquisition mechanism.” TAGSAM works by generating a brief and tiny atmosphere on Bennu. First, It puffs nitrogen outward, causing particles to fly off the asteroid. Then a screen inside TAGSAM acts as a vacuum bag, catching the dust particles as they leave the asteroid’s surface.

Scientists test the robotic vacuum arm called TAGSAM or “touch and go acquisition mechanism” from the OSIRIS-REx spacecraft. Video courtesy of NASA
After collecting a sample, OSIRIS-REx must wait years before it can depart for Earth. Because Bennu’s trajectory is an ellipse, the distance between Bennu and Earth varies from about 62,000 to 1.8 million miles. Once the Earth gets close to Bennu again, OSIRIS-REx will use its engines to kick off the asteroid’s orbit and head home.

What is on Bennu?

Scientists don’t expect to find life on Bennu. But Bennu’s sample could tell us more about what resources are available in space and help us understand the origins of our solar system.

Astronomers believe that Bennu originated from a cloud of hydrogen, helium and dust – the same components that led to the creation of our solar system.

“The way the asteroid’s surface absorbs sunlight and re-emits energy as heat plays a substantial role in its orbital evolution,” Lauretta said. In other words, analyzing how much heat Bennu’s sample gives off can shed light on the birth of our solar system.

Since all meteorite samples become contaminated the moment they encounter the Earth, Bennu’s sample will be kept pristine in a capsule. We know what asteroids are generally made of, thanks to meteorites – small fragments of asteroids that fall to Earth. Bennu is believed to contain large amounts of platinum.

“If you were able to actually mine an asteroid the size of Bennu, you would become the first trillionaire on Earth,” Lauretta said.

The video shows the bizarre method they plan to collect the sample. By "vacuuming" up a sample. Why do I get the sense that this will backfire on them.

NASA | OSIRIS-REx Investigates Asteroid Bennu - 2013
https://www.youtube.com/watch?v=U-VR6pNi70k
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Re: OSIRIS REx Asteroid sample and return mission

Unread postby allynh » Mon Oct 16, 2017 3:28 pm

This first video is the consensus dogma they are using to justify the mission. Deeply scary.

NASA | Asteroid Bennu's Journey
https://www.youtube.com/watch?v=gtUgarROs08

NASA Goddard
Published on Nov 17, 2014

These go into more detail about the mission.

NASA's OSIRIS-REx Asteroid Sample Return Mission
https://www.youtube.com/watch?v=T0FxDxs7lyw

NASA Goddard
Published on Apr 29, 2016

To Bennu and Back
https://www.youtube.com/watch?v=7IQDxm9oQWY

NASA Goddard
Published on Sep 6, 2016
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