Near-Earth object / ID: 2171839
171839 is a near-Earth object of the APO orbit class — Near-Earth asteroid orbits which cross the Earth’s orbit similar to that of 1862 Apollo. Radar and photometric estimates put it between 379m - 847m across. It has been followed since 2001-05-12 across 613 recorded observations. Its next approach to Earth is 2031-May-12 04:07, passing at 53.885 LD. JPL classifies it as a potentially hazardous asteroid, a label driven by its size and how close its orbit comes to ours — not by a predicted impact.
Data source: NASA NeoWs API
Visualization: mesh render
Hazard analysis
PHA status
Potentially hazardous
Min. orbit intersection
0.047 AU
Orbit uncertainty
0 / 9 (well determined)
Sentry monitoring
Not on the Sentry risk list
Orbital parameters
Next closest approach
Date
Relative velocity
12.59 km/s
Miss distance (lunar)
53.885 LD
Miss distance (km)
20,722,498 km
Physical characteristics
Perihelion
1.007 AU
Aphelion
1.914 AU
Orbital period
644.8 days
Inclination
17.077°
Eccentricity
0.311
Semi-major axis
1.461 AU
Est. diameter (min–max)
379m - 847m
Log scale · 1m – 100km
Absolute magnitude
19.2 H
Orbit class
APO
Observations used
613