(3800) Karayusuf Mars-crossing Asteroid
Discovered on 4 January 1984 by E. F. Helin at Palomar.
Named in honor of Alford S. Karayusuf, M.D., in recognition of his enthusiasm and dedication for the extension of space exploration. With a vitality uncommon since the first days of space exploration, he has encouraged the dreams of Man's discovery and adventure in the solar system. He has generously supported near-Earth asteroid research projects at the Jet Propulsion Laboratory and has spearheaded a World Space Foundation program to investigate the distant regions of the solar system.Naming citation (WGSBN Bull. 5, #28, 5), IAU / Minor Planet Center, via NASA/JPL
Where Karayusuf is today
Seen from above the solar system on 2026-10-14: Karayusuf is 1.62 au from the Sun and 1.38 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3800 |
| Provisional designation | 1984 AB |
| Orbit class | Mars-crossing Asteroid |
| Diameter | 1.62 km (#17,305 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.657 |
| Rotation period | 2.23 hours |
| Spectral type | S |
| Absolute magnitude (H) | 15.2 |
| Orbital period | 1.98 years |
| Semi-major axis | 1.58 au |
| Perihelion – aphelion | 1.46 – 1.70 au |
| Eccentricity | 0.0756 |
| Inclination | 14.8° |
| Closest distance between its orbit and Earth's (MOID) | 0.485 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.