Asteroid
Near-Earth
Potentially hazardous
Tantalus
2102 Tantalus (1975 YA)
Where is it now
- Distance from Sun
- 1.676 AU
- True anomaly
- 177.94°
- 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
- 1.29 AU
- Eccentricity
- 0.2994
- Inclination
- 64°
- Orbital period
- 535.2 days
- Perihelion
- 0.904 AU
- Aphelion
- 1.676 AU
- Longitude of ascending node
- 94.35°
- Argument of periapsis
- 61.51°
- Epoch · J2000
- 2461200.5
Physical properties
- Mean radius
- 0.82 km
- Rotation period
- 2.38 hours
Visual & observation
- Geometric albedo
- 0.245
- Absolute magnitude (H)
- 15.99
- Spectral type
- APO
Discovery & classification
Near-Earth Object
Named
Potentially Hazardous Asteroid