(72021) Yisunji Main-belt Asteroid
Discovered on 4 December 2000 by Jeon, Y.-B., Lee, B.-C. at Bohyunsan.
Yi Sunji (1406-1465) was an astronomer during the Chosun Dynasty who took Chosun's calendrical astronomy to the global level. His publication of two astronomy books, Chiljeongsan-naepyeon and Chiljeongsan-oepyeon enabled Chosun to carry out astronomical activities its own way.Naming citation (20040306/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yisunji is today
Seen from above the solar system on 2026-10-14: Yisunji is 2.19 au from the Sun and 2.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 72021 |
| Provisional designation | 2000 XJ15 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 16.07 |
| Orbital period | 3.64 years |
| Semi-major axis | 2.36 au |
| Perihelion – aphelion | 2.06 – 2.67 au |
| Eccentricity | 0.130 |
| Inclination | 7.09° |
| Closest distance between its orbit and Earth's (MOID) | 1.07 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Yi
All asteroids named after someone called Yi
Also discovered on 4 December 2000
- (22173) Myersdavis
- (22174) Allisonmae
- (34666) Bohyunsan
- (63145) Choemuseon
- (67979) Michelory
- (72012) Terute
- (413033) Aerts