2015 BZ509: Extrasolar asteroid?

[Brian G Turner]

The BBC reports on the discovery that an asteroid close to Jupiter - 2015 BZ509 - is actually moving in a retrograde orbit. A suggested explanation is that the asteroid might have entered our solar system during its formation:

'Permanent' interstellar visitor found

 

[Alexa]

As long as the visit remains outside of Earth's orbit, we can grant it a permenent interstallar visa.

 

[Venusian Broon]

Fascinating stuff. It might be significantly older than our solar system, so a look at it's composition would be very interesting.

 

[mosaix]

Asteroid from another star system found orbiting wrong way near Jupiter

A permanent visitor from interstellar space has been found in our solar system, astronomers studying an asteroid orbiting our sun have revealed.

While collisions with Earth by comets and asteroids from within our solar system are thought to have brought organic material and water necessary for life to emerge, experts say the latest discovery suggests bodies from beyond the solar system might have also have played a role.