(91023) Lutan Main-belt Asteroid
Discovered on 23 February 1998 by Beijing Schmidt CCD Asteroid Program at Xinglong.
Lu Tan (b. 1932), an astrophysicist and academician of the Chinese Academy of Sciences, has made contributions in the fields of compact-star physics, cosmology and high-energy astrophysics, especially gamma-ray bursts and afterglow physics.Naming citation (20111012/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Lutan is today
Seen from above the solar system on 2026-10-14: Lutan is 3.11 au from the Sun and 3.73 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 91023 |
| Provisional designation | 1998 DQ32 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.76 km (#11,089 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0850 |
| Absolute magnitude (H) | 14.96 |
| Orbital period | 4.17 years |
| Semi-major axis | 2.59 au |
| Perihelion – aphelion | 2.04 – 3.14 au |
| Eccentricity | 0.212 |
| Inclination | 9.74° |
| Closest distance between its orbit and Earth's (MOID) | 1.03 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.