From August to early December, the OSIRIS-REx spacecraft was aiming at three of its science instruments in terms of Bennu and began to make its own. First impression at her & # 39; mission on the asteroid. During this time, the spacecraft traveled the last 1.4 million (2.2 million kilometers) of its journey to reach 12 miles (19 km) from Bennu on December 3. Science obtained from These ideas reinforced many of the ideas based on the establishment of a Bennu team and a number of new emergencies emerged.
The members of the mission team, led by the University of Arizona, presented the results of the American Geo-American Union Annual Fall, or AGU, in Washington, D.C. on December 10.
In a fundamental analysis of science research at the mission, data obtained from two space beetle spectrometers, the Visible Spectrometer and Infrared OSIRIS-REx (OVIRS) and the OSIRIS-REx (OTES) Thermal Animal Spectrometer (OTES), a & # 39; It shows that there are molecules that contain oxygen and there was a relationship between hydrogen, called "hydroxyls." The crew believes that these hydroxyl groups are all over the world around the asteroid in clay minerals, and means that the rocky material interacts with water. Although Bennu itself is too small to entertain weak water, the discovery shows that there was a fluid water at the time of a parent body Bennu, a much larger asteroid.
"This search may be an important link between what we are experiencing in a place with asteroids such as Identification and what we see in the meteorites that science scientists learn in the talk, "said Ellen Howell, senior research scientist at the Lunar and Planetary Laboratory (LPL) and a member of the mission specializing research group. "It's very interesting that Hydraulic minerals that are spread over the Bindi surface can be seen, because it suggests that they are an integral part of the Bennu shape, not just an impactor surface enclosure . "
"The presence of hydraulic minerals over the asteroid emphasizes that Bennu, which is already left in creating solar system, is a good example for the OSIRIS-REx mission to investigate representing private volatiles and legends, "said Amy Simon, Assistant Vice-OVIRS Assistant at NASA Space Goddard Space Flight.
In addition, data obtained from OSIRIS-REx Camera Suite (OCAMS) and confirm radar surveys are based on a Binding and & E; Verify that the original model – developed in 2013 by the OSIRIS-REx Science Team Senior Team, Michael Nolan, now based at LPL, and colleagues – was very intimate. shaped itself on the asteroid. Measurement measurements, trends, effects and overall shape of the display are almost exactly as measured.
Shortly after the asteroid named after Bennu later in 1999, the Nolan group of the Arecibo Theater used in Puerto Rico to gather information about the size, shape and distribution of radar waves while breaking off It was close to Earth about five times the distance between Earth and its moon.
"Radar comments do not give us any information about the colors or colors of the object, so it's very interesting to see the asteroid near OSIRIS-REx eyes," said Nolan. "As we get more information, we show out where the crackers and boulders are, and we were really surprised that "Everything we've seen in the radar image is back then right now."
The team used the confidence to create this ground-based model when I was the OSIRIS-REx mission design. The accuracy of its model is & # 39; meant that the purpose, spacecraft, and planned ideas were appropriately designed for Bennu's leading activities.
It is one outside of the format model that is expected to increase the size of the large boulder near the right pollination of Bennu. The ground-based pattern of the pattern was a & # 39; This stone should be at least 33 feet (10 meters). Initial calculations from OCAMS surveys show that the ulcer is closer to 164 feet (50 meters), with a width of about 180 feet (55 meters) wide.
As was the case, the first evaluation of Setting & Regulating is a & # 39; Demonstrates the surface of Bennu as a mixture of very rocky areas, with boulders and some flat sections that are not of stones. However, the number of boulders on the surface is higher than expected. The team will make further consideration at closer areas to provide a more detailed assessment of where to determine the Determination to return to the Earth later.
"Our starting data shows that the team built the right asteroid as the target of the OSIRIS-REx mission. We have not found amazing questions at Bennu so far," said Dante Lauretta, chief inspector OSIRIS-REx habitats and professor of political science and cosmochemistry at LPL. "The spacecraft is healthy and science instruments work better than needed. The time now is for the start of our tourism."
"Science fiction is now the truth," President UA, Robert C. Robbins said. "Bennu's work is to provide a step closer to asteroids to bring astronauts into future missions into the solar system with resources such as fuel and water. "
At this time the intention is to start the asteroid, and # 39; fly to a spaceboat in tours over a & # 39; the northern pole of Bennu, middle zone and a & # 39; south pole at a level of less than 4.4 miles (7 km) to better test the mass of the asteroid. This survey also provides a & # 39; The first opportunity for OSIRIS-REx Laser Altimeter (OLA), an instrument issued by the Spanish Spaniards, now make the spacecraft near Bennu. The first installment of its & # 39; a spaceship registered for December 31, and OSIRIS-REx will remain in orbit until mid-February 2019, when the mission is submitted to the next stage of inspection. During this first race, the asteroid attack vessel will add a range of 0.9 miles (1.4km) to 1.24 miles (2 km) from the center of Bennu – a & # 39; Setting two new albums for the smallest body that has been sent away by the nearest spatial boat of a planetary body with any spacecraft.