Sight beyond sight for astrophysicists
A new technique allows scientists to accurately image an asteroid 200 million kilometres away.
A new technique allows scientists to accurately image an asteroid 200 million kilometres away.
Delbo explains, “Knowledge of the sizes and shapes of asteroids is crucial to understanding how, in the early days of our Solar System, dust and pebbles collected together to form larger bodies and how collisions and re-accumulation have since modified them.”
By using the interferometry (combing the light from two or more telescopes) the team observed the main belt asteroid (234) called Barbara. It seems that Barbara is composed of two bodies, each the size of a large city. The asteroid could be shaped like a giant peanut or it could be two separate bodies orbiting each but if it is a double asteroid it would be possible to calculate its density from diameter and orbit measurements.
“Barbara is clearly a high priority target for further observations,“ concludes colleague Ligori.
By Leila Sattary
