Asteroid
Near-Earth
137170
137170 (1999 HF1)
Where is it now
- Distance from Sun
- 0.888 AU
- True anomaly
- 126.48°
- 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
- 0.819 AU
- Eccentricity
- 0.4625
- Inclination
- 25.66°
- Orbital period
- 270.8 days
- Perihelion
- 0.44 AU
- Aphelion
- 1.198 AU
- Longitude of ascending node
- 155.84°
- Argument of periapsis
- 253.42°
- Epoch · J2000
- 2461000.5
Physical properties
- Rotation period
- 2.32 hours
Visual & observation
- Absolute magnitude (H)
- 14.66
- Spectral type
- ATE
Discovery & classification
Near-Earth Object
Sources
- orbital elements: JPL SBDB