Hyperbolic asteroid
A hyperbolic asteroid is any sort of asteroid or non-cometary astronomical object observed to have an orbit not bound to the Sun and will have an orbital eccentricity greater than 1 when near perihelion. Unlike hyperbolic comets, they have not been seen out-gassing light elements, and therefore have no cometary coma. Most of these objects will only be weakly hyperbolic and will not be of interstellar origin. ʻOumuamua is the only hyperbolic object with an eccentricity large enough to truly demonstrate that it is of interstellar origin.[1][2]
Known hyperbolic asteroids
There are no known hyperbolic asteroids as of 2018[update].
References
- ↑ "Interstellar Asteroid FAQs". NASA. 2017-11-20. Archived from the original on 18 December 2019. Retrieved 3 September 2018.
- ↑ Knight, Matthew; Protopapa, Silvia; Kelley, Michael (2017-12-12). "On the Rotation Period and Shape of the Hyperbolic Asteroid 1I/'Oumuamua (2017 U1) from Its Lightcurve". The Astrophysical Journal Letters. 851 (2).
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