(903) Nealley Outer Main-belt Asteroid
Discovered on 13 September 1918 by J. Palisa at Vienna.
Where Nealley is today
Seen from above the solar system on 2026-10-14: Nealley is 3.37 au from the Sun and 4.30 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 903 |
| Provisional designation | A918 RH |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 58.1 km (#617 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0540 |
| Rotation period | 19.7 hours |
| Absolute magnitude (H) | 10.11 |
| Orbital period | 5.83 years |
| Semi-major axis | 3.24 au |
| Perihelion – aphelion | 3.08 – 3.40 au |
| Eccentricity | 0.0500 |
| Inclination | 11.8° |
| Closest distance between its orbit and Earth's (MOID) | 2.09 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.