Near-Earth object / ID: 2138911
138911 is a near-Earth object of the AMO orbit class — Near-Earth asteroid orbits similar to that of 1221 Amor. Radar and photometric estimates put it between 342m - 766m across. It has been followed since 1984-08-02 across 1023 recorded observations. It is not classified as a potentially hazardous asteroid.
Data source: NASA NeoWs API
Visualization: mesh render
Hazard analysis
PHA status
Not hazardous
Min. orbit intersection
0.234 AU
Orbit uncertainty
0 / 9 (well determined)
Sentry monitoring
Not on the Sentry risk list
Orbital parameters
Close approach
No approaches to Earth on record.
Physical characteristics
Est. diameter (min–max)
342m - 766m
Log scale · 1m – 100km
Absolute magnitude
19.4 H
Orbit class
Perihelion
1.240 AU
Aphelion
1.460 AU
Orbital period
572.7 days
Inclination
1.662°
Eccentricity
0.082
Semi-major axis
1.350 AU
AMO
Observations used
1,023