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takyon writes:

Astronomers have posited an interstellar origin for (514107) 2015 BZ₅₀₉, the first example of a retrograde co-orbital asteroid with one of the solar system's planets (Jupiter):

An asteroid in Jupiter's orbit [Note: actually orbiting the Sun and crossing the orbit of Jupiter] may have come from outside our Solar System, according to a new study. Unlike 'Oumuamua, the interstellar object which briefly visited the Solar System earlier this year, 2015 BZ509 (affectionately known as BZ) seems to have been here for 4.5 billion years. This makes it the first known interstellar asteroid to have taken up residence orbiting the Sun.

It is not yet known where the object came from. "That's what we need to figure out next," laughs Dr Fathi Namouni from the Universite Cote d'Azur, one of the study's authors. "Because 'Oumuamua was just passing by... it's not that difficult to go back and pinpoint where it came from," he told BBC News. "BZ reached the Solar System when it was forming, when the planets themselves were not exactly where they are now. So it's a little more tricky to figure out where it came from."

Also at Scientific American, Science News, EarthSky, and CNN.

An interstellar origin for Jupiter's retrograde co-orbital asteroid (open, DOI: 10.1093/mnrasl/sly057) (DX)

Related: Possible Interstellar Asteroid/Comet Enters Solar System
Interstellar Asteroid Named: 'Oumuamua
ESO Observations Show First Interstellar Asteroid is Like Nothing Seen Before
Breakthrough Listen to Observe Interstellar Asteroid 'Oumuamua for Radio Emissions (none were found)
'Oumuamua Likely Originated in the Local Association (Pleiades Moving Group)

Original Submission

1. "takyon" - https://soylentnews.org/~takyon/
2. "posited an interstellar origin" - http://www.bbc.com/news/science-environment-44173403
3. "(514107) 2015 BZ509" - https://en.wikipedia.org/wiki/(514107)_2015_BZ509
4. "interstellar object" - http://www.bbc.co.uk/news/science-environment-42019778
5. "Scientific American" - https://www.scientificamerican.com/article/astronomers-spot-potential-interstellar-asteroid-orbiting-backward-around-the-sun/
6. "Science News" - https://www.sciencenews.org/article/weird-asteroid-immigrant-outside-solar-system
7. "EarthSky" - http://earthsky.org/space/asteroid-2015-bz509-1st-permanent-immigrant
8. "CNN" - https://www.cnn.com/2018/05/21/world/interstellar-object-living-in-our-solar-system/index.html
9. "An interstellar origin for Jupiter's retrograde co-orbital asteroid" - https://academic.oup.com/mnrasl/article/477/1/L117/4996014
10. "DX" - https://dx.doi.org/10.1093/mnrasl/sly057
11. "Possible Interstellar Asteroid/Comet Enters Solar System" - https://soylentnews.org/article.pl?sid=17/10/27/0031243
12. "Interstellar Asteroid Named: 'Oumuamua" - https://soylentnews.org/article.pl?sid=17/11/18/1324236
13. "ESO Observations Show First Interstellar Asteroid is Like Nothing Seen Before" - https://soylentnews.org/article.pl?sid=17/11/22/0344200
14. "Breakthrough Listen to Observe Interstellar Asteroid 'Oumuamua for Radio Emissions" - https://soylentnews.org/article.pl?sid=17/12/13/0919242
15. "'Oumuamua Likely Originated in the Local Association (Pleiades Moving Group)" - https://soylentnews.org/article.pl?sid=18/01/06/0747243
16. "Original Submission" - https://soylentnews.org/submit.pl?op=viewsub&subid=26777

printed from SoylentNews, Retrograde Jupiter Co-Orbital Asteroid May Have an Interstellar Origin on 2024-04-23 16:59:35