Home Science Space OSIRIS-REx TAGs Surface of Asteroid Bennu

OSIRIS-REx TAGs Surface of Asteroid Bennu

Captured on Oct. 20, 2020 during the OSIRIS-REx mission’s Touch-And-Go (TAG) sample collection event, this series of images shows the SamCam imager’s field of view as the NASA spacecraft approaches and touches down on asteroid Bennu’s surface, over 200 million miles (321 million km) away from Earth. The sampling event brought the spacecraft all the way down to sample site Nightingale, touching down within three feet (one meter) of the targeted location.

The team on Earth received confirmation at 6:08 p.m. EDT that a successful touchdown occurred. Preliminary data show the one-foot-wide (0.3-meter-wide) sampling head touched Bennu’s surface for approximately 6 seconds, after which the spacecraft performed a back-away burn.

The spacecraft’s sampling arm — called the Touch-And-Go Sample Acquisition Mechanism (TAGSAM) — is visible in the lower part of the frame. The round head at the end of TAGSAM is the only part of OSIRIS-REx that contacted the surface during the sample collection event. In the middle of the image sequence, the sampling head positions itself to contact the asteroid’s surface head-on. Shortly after, the sampling head impacts site Nightingale and penetrates Bennu’s regolith.

Upon initial contact, the TAGSAM head appears to crush some of the porous rocks underneath it. One second later, the spacecraft fires a nitrogen gas bottle, which mobilizes a substantial amount of the sample site’s material. Preliminary data show the spacecraft spent approximately 5 of the 6 seconds of contact collecting surface material, and the majority of sample collection occurred within the first 3 seconds.

Captured on Oct. 20 during the OSIRIS-REx mission’s Touch-And-Go (TAG) sample collection event, this series of 2 images shows the SamCam imager’s field of view at the moment before and after the NASA spacecraft touched down on asteroid Bennu’s surface. The sampling event brought the spacecraft all the way down to sample site Nightingale, and the team on Earth received confirmation of successful touchdown at 6:08 p.m. EDT. Preliminary data show the sampling head touched Bennu’s surface for approximately 6 seconds, after which the spacecraft performed a back-away burn. (Image: NASA / Goddard / University of Arizona)

The TAGSAM is designed to catch the agitated surface material, and the mission team will assess the amount of material collected through various spacecraft activities. After touchdown, the spacecraft fired its thrusters to back away from Bennu. As expected, this maneuver also disturbed the Nightingale site, and loose debris is visible near the end of the image sequence.

Preliminary telemetry shows the spacecraft remains in good health. The spacecraft was traveling at 0.2 mph (10 cm/sec) when it contacted sample site Nightingale and then backed away at 0.9 mph (40 cm/sec).

These images were captured over approximately a 5-minute period. The imaging sequence begins at about 82 feet (25 meters) above the surface and runs through the back-away maneuver, with the last image in the sequence taken at approximately 43 feet (13 meters) in altitude — about 35 seconds after backing away. The sequence was created using 82 SamCam images, with 1.25 seconds between frames. For context, the images are oriented with Bennu’s west at the top.

Provided by: NASA’s Goddard Space Flight Center [Note: Materials may be edited for content and length.]

Follow us on Twitter or subscribe to our email list

Troy Oakes
Troy was born and raised in Australia and has always wanted to know why and how things work, which led him to his love for science. He is a professional photographer and enjoys taking pictures of Australia's beautiful landscapes. He is also a professional storm chaser where he currently lives in Hervey Bay, Australia.

Most Popular

New York Man Writes Free Letters for Strangers

In this age of email, only a few people would actually take the time to write a letter and send it through traditional post....

6 Movies to Stream on Netflix This Lockdown

Being alone in your home during lockdown can be boring and depressing. This is where video streaming websites like Netflix come to the rescue....

New Hubble Space Telescope Data Explains Missing Dark Matter

New data from the NASA/ESA Hubble Space Telescope provides further evidence for tidal disruption in the galaxy NGC 1052-DF4. This result explains a previous...

China Worst Violator of Religious Freedom, Says PEW Study

A new PEW research study has ranked China at the top of its Government Restrictions Index (GRI) out of 198 nations, noting that the...