☄️ Helena (asteroide 101)
Helena (asteroid 101) today: 2.789 AU from Earth (417.2 million km), heliocentric distance 2.221 AU, orbital period 4.153 years. Computed via Kepler solver with JPL SBDB osculating elements.
Position now (2026-04-29 09:03 UTC)
| Heliocentric distance: | 2.2208 AU |
| Geocentric distance: | 2.7887 AU (417.2 million km) |
| Geocentric ecliptic longitude: | 352.492° |
| Geocentric ecliptic latitude: | -1.439° |
| RA J2000 (approximate): | 353.675° |
| Dec J2000 (approximate): | -4.300° |
| True anomaly: | 1.980° |
Orbital elements (Keplerian)
| Semi-major axis (a): | 2.5837 AU |
| Eccentricity (e): | 0.14052 |
| Inclination (i): | 10.192° |
| Long. ascending node (Omega): | 343.358° |
| Argument of perihelion (omega): | 347.757° |
| Mean anomaly at epoch (M0): | 323.652° |
| Osculation epoch (JD): | 2461000.5 |
| Orbital period: | 4.153 years |
About Helena
Discovered in 1868 by James Craig Watson. IAU designation: 101 Helena. Estimated diameter: 65.8 km. Absolute magnitude H: 8.39.
Asteroide tipo S do cinturao medio.
Limitation
Osculating elements are from epoch 2461000.5 JD. Keplerian propagation ignores perturbations (especially Jupiter for belt asteroids). For precision beyond months, consult JPL Horizons.
See all asteroids, methodology, precision.