Asteroid
Near-Earth
85818
85818 (1998 XM4)
Where is it now
- Distance from Sun
- 1.996 AU
- True anomaly
- 221.09°
- As of
- 29 August 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
Orbital elements
- Semi-major axis
- 1.657 AU
- Eccentricity
- 0.416
- Inclination
- 62.72°
- Orbital period
- 778.8 days
- Perihelion
- 0.967 AU
- Aphelion
- 2.346 AU
- Longitude of ascending node
- 235.64°
- Argument of periapsis
- 301.22°
- Epoch · J2000
- 2461000.5
Physical properties
- Mean radius
- 1.01 km
- Rotation period
- 19.45 hours
Visual & observation
- Geometric albedo
- 0.168
- Absolute magnitude (H)
- 15.42
- Spectral type
- APO
Discovery & classification
Near-Earth Object
Sources
- orbital elements: JPL SBDB