(514107) Ka'epaoka'awela
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Asteroid (514107) Ka'epaoka'awela |
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|---|---|
| Properties of the orbit ( animation ) | |
| Major semi-axis | 5.1375 AU |
| eccentricity | 0.3805 |
| Perihelion - aphelion | 3.1824 AU - 7.0925 AU |
| Inclination of the orbit plane | 163.0005 ° |
| Length of the ascending node | 307.3802 ° |
| Argument of the periapsis | 257.3803 ° |
| Time of passage of the perihelion | January 28, 2016 |
| Sidereal period | 11.64 a |
| Physical Properties | |
| Absolute brightness | 16.0 mag |
| history | |
| Explorer | Pan-STARRS 1 |
| Date of discovery | November 26, 2014 |
| Another name | 2015 BZ 509 |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(514107) Ka'epaoka'awela is an asteroid about three kilometers in size that moves in a retrograde orbit in the solar system. Computer simulations revealed that the asteroid discovered in 2014 may be of extrasolar origin and was captured by the sun's gravity during the formation of the solar system .
Naming
The name is of Hawaiian origin and was explained as follows:
“In the Hawaiian language Ka'epaoka'āwela means the mischievous opposite-moving companion of Jupiter, evoking the image of a retrograde object of unknown origin. He hoa hōkūna'i 'e'epa no Ka'āwela e holo' ēko'a ana ma ka poe lā. "
The naming was announced on April 6, 2019.
Possible extrasolar origin
The retrograde orbit around the sun in constant proximity to the prograde orbit of a planet, Jupiter , distinguishes (514107) 2015 BZ 509 from the few other retrograde objects of the solar system that have been discovered so far. On the basis of computer simulations, Fathi Namouni and Helena Morais assume in a specialist article published in 2018 that the asteroid could not have been formed in the solar system, but was probably captured from another planetary system in the early days of the solar system. It would be the first discovered asteroid of extrasolar origin with orbit around the sun.
See also
- 1I / ʻOumuamua and 2I / Borisov , confirmed interstellar objects
Web links
- scinexx .de: Discovered: first interstellar "permanent guest " May 22, 2018
- Astronomy picture of the day : the fall of the backward orbiting asteroid . Animation, May 30, 2018
Individual evidence
- ↑ a b Ghostly drivers in space. In: Spiegel Online . March 30, 2018, accessed May 23, 2018 .
- ^ Paul Wiegert, Martin Connors, Christian Veillet: A retrograde co-orbital asteroid of Jupiter . In: Nature . 2017, pp. 687-689. doi : 10.1038 / nature22029 .
- ↑ Tilmann Althaus: An interstellar asteroid in the solar system. In: Spectrum of Science. May 21, 2018. Retrieved May 23, 2018 .
- ↑ Minor Planet Circ. 112435 (PDF)
- ↑ Fathi Namouni, Helena Morais: An interstellar origin for Jupiter's retrograde co-orbital asteroid . In: Monthly Notices of the Royal Astronomical Society: Letters , Volume 477, Issue 1, June 11, 2018, pp. L117 – L121