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Thread: Osiris-Rex mission to bring back samples from astroid Bennu

  1. #31
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    NASA on what they will be doing over the next few months as they approach Bennu.

    https://www.nasa.gov/feature/goddard...tions-campaign

    During the mission’s approach phase, OSIRIS-REx will:

    regularly observe the area around the asteroid to search for dust plumes and natural satellites, and study Bennu’s light and spectral properties;
    execute a series of four asteroid approach maneuvers, beginning on Oct. 1, slowing the spacecraft to match Bennu's orbit around the Sun;
    jettison the protective cover of the spacecraft’s sampling arm in mid-October and subsequently extend and image the arm for the first time in flight; and
    use OCAMS to reveal the asteroid’s overall shape in late-October and begin detecting Bennu’s surface features in mid-November.
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  2. #32
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    OSIRIS-REx has started adjusting its approach to asteroid Bennu.

    http://www.spacedaily.com/reports/NA...euver_999.html

    NASA's OSIRIS-REx spacecraft executed its first Asteroid Approach Maneuver (AAM-1) today putting it on course for its scheduled arrival at the asteroid Bennu in December.

    The spacecraft's main engine thrusters fired in a braking maneuver designed to slow the spacecraft's speed relative to Bennu from approximately 1,100 mph (491 m/sec) to 313 mph (140 m/sec).

    The mission team will continue to examine telemetry and tracking data as they become available and will have more information on the results of the maneuver over the next week.
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  3. #33
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    OSIRIS-REx is less than 100,000km from Bennu.

    https://www.cnet.com/news/nasa-osiri...-target-bennu/

    Officially beginning "Asteroid Operations" in August, NASA's asteroid chasing spacecraft is slowing itself down for its arrival at asteroid Bennu on Dec. 3. In the meantime, NASA has provided a "tale of the tape" for its approach -- a series of images stitched together that documents OSIRIS-REx's approach.

    Shot between Aug. 17 and Oct. 1, OSIRIS-REx's PolyCam imager snapped the obsidian black of the cosmos and a tiny, slowly brightening spot of light: 101955 Bennu. Over that period the spacecraft moved from 2.2 million kilometres away to a measly (in space terms) 192,000 kilometres, taking a snapshot every Monday, Wednesday and Friday (asteroid chasers -- and their engineers -- need weekends, too). That decreasing distance saw Bennu grow from 0.017 pixels to a whopping 0.19 pixels in size, giving us the following enticing but grainy photoset below.
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  4. #34
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    "NASA's OSIRIS-REx executes second asteroid approach maneuver"

    http://www.spacedaily.com/reports/NA...euver_999.html

    NASA's OSIRIS-REx spacecraft executed its second Asteroid Approach Maneuver (AAM-2). The spacecraft's main engine thrusters fired in a braking maneuver designed to slow the spacecraft's speed relative to Bennu from 315 mph (141 m/sec) to 11.8 mph (5.2 m/sec).

    Likewise, the spacecraft's approach speed dropped from nearly 7,580 miles (12,200 km) to 280 miles (450 km) per day.

    The mission team will continue to examine telemetry and tracking data and will have more information over the next week. This burn marked the last planned use of the spacecraft's main engines prior to OSIRIS-REx's departure from Bennu in March 2021.
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  5. #35
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    "OSIRIS-REx captures 'super-resolution' view of Bennu"

    http://www.spacedaily.com/reports/OS...Bennu_999.html

    This "super-resolution" view of asteroid Bennu was created using eight images obtained by NASA's OSIRIS-REx spacecraft on Oct. 29, 2018, from a distance of about 205 miles (330 km).

    The spacecraft was moving as it captured the images with the PolyCam camera, and Bennu rotated 1.2 degrees during the nearly one minute that elapsed between the first and the last snapshot.

    The team used a super-resolution algorithm to combine the eight images and produce a higher resolution view of the asteroid. Bennu occupies about 100 pixels and is oriented with its north pole at the top of the image.
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  6. #36
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    Quote Originally Posted by selvaarchi View Post
    "OSIRIS-REx captures 'super-resolution' view of Bennu"

    http://www.spacedaily.com/reports/OS...Bennu_999.html
    Looks like Ryugus twin.

  7. #37
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    Quote Originally Posted by Superluminal View Post
    Looks like Ryugus twin.
    I disagree, this one looks more like solid body whereas Ryugus looked like a "ball" of rubble.

  8. #38
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    Both are roughly diamond shape.

    And right when I got used to seeing contact binary potatoes

  9. #39
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    "NASA's OSIRIS-REx executes fourth asteroid approach maneuver"

    http://www.spacedaily.com/reports/NA...euver_999.html

    NASA's OSIRIS-REx spacecraft executed its fourth Asteroid Approach Maneuver (AAM-4) yesterday. The spacecraft fired its Attitude Control System (ACS) thrusters to slow the spacecraft from approximately 0.31 mph (0.14 m/sec) to 0.10 mph (0.04 m/sec).

    The ACS thrusters are capable of velocity changes as small as 0.02 mph (0.01 m/sec).

    The mission team will continue to examine telemetry and tracking data over the next week to verify the new trajectory. The maneuver targeted the spacecraft to fly through a corridor designed for the collection of high-resolution images that will be used to build a shape model of Bennu.
    I am because we are
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