(2378) Pannekoek Main-belt Asteroid
Discovered on 13 February 1935 by H. van Gent at Johannesburg.
Where Pannekoek is today
Seen from above the solar system on 2026-10-14: Pannekoek is 2.79 au from the Sun and 1.86 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 2378 |
| Provisional designation | 1935 CY |
| Orbit class | Main-belt Asteroid |
| Diameter | 40.4 km (#961 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0570 |
| Rotation period | 11.9 hours |
| Spectral type | Cgh |
| Absolute magnitude (H) | 11.14 |
| Orbital period | 4.91 years |
| Semi-major axis | 2.89 au |
| Perihelion – aphelion | 2.49 – 3.29 au |
| Eccentricity | 0.140 |
| Inclination | 14.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.55 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.