LBTO/UWO/Athabasca: A Trojan in Retreat

Find out the latest thinking about our universe.
User avatar
bystander
Apathetic Retiree
Posts: 19005
Joined: Mon Aug 28, 2006 2:06 pm
Location: Oklahoma

LBTO/UWO/Athabasca: A Trojan in Retreat

Post by bystander » Wed Mar 29, 2017 8:42 pm

The first retrograde co-orbital asteroid: 2015 BZ509 — a Trojan in retreat
Large Binocular Telescope | University of Western Ontario | Athabasca University | 2017 Mar 29
Click to play embedded YouTube video.
In the March 30 2017 issue of the journal Nature, astronomers reveal that an as-yet-unnamed rare asteroid with the provisional designation 2015 BZ509 (nicknamed 'BZ') travelling in the opposite direction to all the planets and 99.99% of the other asteroids in our Solar System — a state referred to as retrograde motion— is also safely sharing the orbital space of the giant planet Jupiter.

There are about 6000 other asteroids which share Jupiter's orbit space with it. Called the 'Trojan asteroids', they co-exist easily with the giant Jupiter because they go around in the same direction, called prograde motion. If the Solar System were a giant race track around the Sun, the planets would be like monster trucks, and the asteroids like ridiculously tiny clown cars. Though all this traffic is inherently dangerous, collisions are usually avoided because the planets and asteroids go around the track in the same direction. ...

A retrograde co-orbital asteroid of Jupiter - Paul Wiegert, Martin Connors, Christian Veillet
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk.
— Garrison Keillor