(3644) Kojitaku Main-belt Asteroid
Discovered on 5 October 1931 by K. Reinmuth at Heidelberg.
Where Kojitaku is today
Seen from above the solar system on 2026-10-14: Kojitaku is 2.04 au from the Sun and 1.89 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3644 |
| Provisional designation | 1931 TW |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.76 km (#9,279 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.371 |
| Rotation period | 4.15 hours |
| Absolute magnitude (H) | 13.23 |
| Orbital period | 3.37 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 2.04 – 2.46 au |
| Eccentricity | 0.0933 |
| Inclination | 3.53° |
| Closest distance between its orbit and Earth's (MOID) | 1.06 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.