(5051) Ralph Main-belt Asteroid
Discovered on 24 September 1984 by P. Jensen at Brorfelde.
Ralph Florentin Nielsen (1942-1995) was head of the electronics laboratory at the Brorfelde Observatory.Naming citation (20000124/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
👶 Ralph as a baby name🐶 Ralph as a dog name🐱 Ralph as a cat name
Where Ralph is today
Seen from above the solar system on 2026-10-14: Ralph is 2.23 au from the Sun and 1.39 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5051 |
| Provisional designation | 1984 SM |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.59 km (#11,447 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.401 |
| Spectral type | Sr |
| Absolute magnitude (H) | 13.75 |
| Orbital period | 3.47 years |
| Semi-major axis | 2.29 au |
| Perihelion – aphelion | 1.96 – 2.62 au |
| Eccentricity | 0.144 |
| Inclination | 5.88° |
| Closest distance between its orbit and Earth's (MOID) | 0.956 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.