Near-Earth object / ID: 2161989
161989 Cacus 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 917m - 2.1km across. It has been followed since 1978-02-08 across 1798 recorded observations. Its next approach to Earth is 2028-Mar-07 09:19, passing at 57.429 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
0.015 AU
Orbit uncertainty
0 / 9 (well determined)
Sentry monitoring
Not on the Sentry risk list
Orbital parameters
Next closest approach
Date
Relative velocity
13.80 km/s
Miss distance (lunar)
57.429 LD
Miss distance (km)
22,085,637 km
Physical characteristics
Perihelion
0.883 AU
Aphelion
1.363 AU
Orbital period
434.5 days
Inclination
26.066°
Eccentricity
0.214
Semi-major axis
1.123 AU
Est. diameter (min–max)
917m - 2.1km
Log scale · 1m – 100km
Absolute magnitude
17.3 H
Orbit class
APO
Observations used
1,798