Immediately after a journey of much more than 80 million miles (130m km), Osiris-Rex is now about 12 miles (19km) away from Bennu, and will get ever nearer, likely into the asteroid’s orbit on 31 December.
Spacecrafts have in no way in advance of orbited a cosmic overall body as tiny as Bennu, which measures at just 500m (1,600ft) across.
Dante Lauretta, the lead scientist of the mission, tweeted he was “relieved, happy and anxious to begin discovering!” adhering to the arrival of the probe.
Osirus Rex is set to convey dwelling the most significant haul of room supplies considering the fact that astronauts hand-shipped moon rocks to Earth in the 1960s and 1970s.
It has been chasing the diamond-formed overall body for two a long time, and will orbit it for one more 12 months in advance of scooping some gravel from the asteroid’s area and sending it back again to Earth.
“For the earlier numerous months, Bennu has been coming into aim as I approached,” the probe’s Twitter account said.
“Now that I’m below, I am going to fly about the asteroid and review it in depth. All the facts I obtain will aid my staff decide a spot to sample in 2020.”
Scientists hope they will get to look at the contents of an astronomical time capsule, with the carbon-abundant substance taken from Bennu’s surface holding proof from the starting of the solar process 4.5bn a long time in the past.
They hope the robotic will accumulate at minimum 60g (two ounces) of dust and gravel from Bennu, using a 3m (10ft) mechanical arm to hoover up particles.
The sample container will then split absolutely free from Osirus Rex and head to Earth in 2021, parachuting down to Utah.
Mr Lauretta said researchers ended up interested in “organic molecules that may have led to the origin of everyday living and water-bearing minerals like clays” in their examination of the asteroid.
In the meantime, a Japanese probe is circling an asteroid named Ryugu, about double the dimensions of Bennu, with a system to carry home some specks of room dust.