View Full Version : Interstellar asteroid in orbit around our Sun

2018-May-21, 03:35 PM
We have a permanent immigrant to our solar system.!!!

http://www.spacedaily.com/reports/First_Interstellar_Immigrant_Discovered_in_the_Sol ar_System_999.html

A new study has discovered the first known permanent immigrant to our solar system. The asteroid, currently nestling in Jupiter's orbit, is the first known asteroid to have been captured from another star system. The work is published in Monthly Notices of the Royal Astronomical Society: Letters.

The object known as 'Oumuamua was the last interstellar interloper to hit the First Interstellar Immigrant Discovered in the Solar Systems in 2017. However, it was just a tourist passing through, whereas this former exo-asteroid - given the catchy name (514107) 2015 BZ509 - is a long-term resident.

All of the planets in our solar system, and the vast majority of other objects as well, travel around the Sun in the same direction. However, 2015 BZ509 is different - it moves in the opposite direction in what is known as a 'retrograde' orbit.

Tom Mazanec
2018-May-21, 04:16 PM
So, unlike 'Oumuamua this was formed from our parent stellar nursery and captured from a solar sibling. So its composition should not be particularly interesting?

2018-May-21, 04:17 PM
One can find more information at Paul Wiegert's website:


Ross 54
2018-May-22, 03:45 PM
There's been a good deal of scientific skepticism expressed about the interstellar origins of 'Bee-Zed'. We know of at least 95 other small bodies in our solar system, which have retrograde orbits. These may have had their orbits reversed by interactions with other objects in our solar system. No mathematical model has been produced to show just how 2015 BZ 509 would have been captured into a co-orbit with Jupiter, supposing it actually came in from interstellar space.

Please find a link, below, to an article with further details: