Asteroids – Astronomy Now

Sodium jets may explain asteroid Phaethon’s comet-like brightening

17 August 2021 Astronomy Now

When does an asteroid behave like a comet? Perhaps when sub-surface sodium heats up and fizzes into space during a close pass by the Sun.

16 Psyche may not be as metallic as previously thought

11 June 2021 Astronomy Now

Lab-based experiments suggest the asteroid 16 Psyche may be more rubble pile than metallic remnant of a dense planetary core.

Car-size asteroid found in orbit around Earth; Musk jokes ‘it’s not mine’

27 February 2020 Astronomy Now

A car-size asteroid found orbiting Earth like a mini moon was captured three years ago and will soon escape the planet’s gravitational embrace.

Citizen scientists track down asteroids in Hubble photos

14 October 2019 Astronomy Now

Citizen scientists spot thousands of asteroid trails in archived photos from the Hubble Space Telescope, helping astronomers pin down orbits

Japanese spacecraft snags second sample from asteroid

11 July 2019 Stephen Clark

Scientists celebrated another success with Japan’s Hayabusa 2 spacecraft late Wednesday (U.S. time), when the robot explorer accomplished a second pinpoint touch-and-go landing on asteroid Ryugu, this time to collect a sample of pristine dust and rock excavated by an explosive impactor earlier this year.

Hayabusa 2 cleared for second touchdown on asteroid

5 July 2019 Stephen Clark

Ground teams have approved plans for Japan’s Hayabusa 2 sample return mission to briefly land on asteroid Ryugu for the second time on 11 July, aiming for a targeted touch-and-go to gather material exposed by an explosive impactor released by the robot explorer in April.

Shattering an in-bound asteroid may be tougher than thought

4 March 2019 Astronomy Now

A new computer model indicates it may be tougher to break up a large asteroid on a collision course with Earth than previously believed.

Japanese probe lands on asteroid to capture sample

24 February 2019 Stephen Clark

Japan’s Hayabusa 2 spacecraft briefly landed on an asteroid Thursday more than 200 million miles from Earth and fired a bullet to scoop up a rocky sample, successfully accomplishing one of the mission’s most challenging manoeuvres before returning the asteroid specimen to scientists on the ground in December 2020.

Asteroid missions on track to reach their destinations in 2018

18 January 2018 Stephen Clark

Pioneering spacecraft from NASA and the Japanese space agency promise to reveal two unexplored asteroids later this year, officials said Wednesday, beginning surveys that will culminate in daring descents to capture samples for return to Earth, where eager scientists await a hands-on look at the specimens.

Arecibo radar returns with asteroid Phaethon images

29 December 2017 Astronomy Now

After several months of downtime since Hurricane Maria struck the island of Puerto Rico, the Arecibo Observatory Planetary Radar has returned to normal operation, providing the highest-resolution images to date of near-Earth asteroid 3200 Phaethon during its December 2017 close approach to Earth.