Aten asteroid
Near-Earth Objects
(NEOs)The Aten asteroids are a
Description
Aten asteroids are defined by having a
Earth-crossing asteroids
as the orbit of Earth varies between 0.983 and 1.017 AU.
Asteroids' orbits can be highly eccentric. Nearly all known Aten asteroids have an
Apollo-class asteroids
are known than Aten-class asteroids, possibly because of the sampling bias.
The shortest semi-major axis for any known Aten asteroid is 0.580 AU, for object 2016 XK24.eccentricity: (137924) 2000 BD19 has an orbit with an eccentricity of 0.895, which takes it from a perihelion of 0.092 AU, well within Mercury's orbit, to an aphelion of 1.66 AU, which is greater than the semi-major axis of Mars (1.53 AU).
NEO types
| Group | q |
a |
Q |
ECA
|
|---|---|---|---|---|
| Amors | > 1.017 | >1.0 | – | 
|
| Apollos | < 1.017 | >1.0 | – | 
|
| Atens | – | <1.0 | > 0.983 |
|
| Atiras | – | <1.0 | < 0.983 |
|
| For all NEOs q is < 1.3 AU; The orbit of Earth varies between 0.983 and 1.017 AU | ||||
See also
References
- ^ a b c "NEO Basics". NASA/JPL CNEOS. Retrieved 17 May 2018.
- ^ "Small-Body Database Query". Solar System Dynamics - Jet Propulsion Laboratory. NASA - California Institute of Technology. Retrieved 13 November 2023.
- ^ a b "List Of Aten Minor Planets (by perihelion distance)". Minor Planet Center. 17 May 2017. Retrieved 17 May 2017.
- ^ a b "Discovery Statistics – Cumulative Totals". NASA/JPL CNEOS. 16 May 2018. Retrieved 17 May 2018.
| Main | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Distribution |
| ||||||||
| Classification |
| ||||||||
| Exploration |
| ||||||||
| Lists | |||||||||
| Related |
| ||||||||
