(18991) Tonivanov Main-belt Asteroid
Discovered on 1 September 2000 by LINEAR at Socorro.
Tonislav Ivanov Ivanov (b. 1984) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for his computer science project. He also received the Intel Foundation Achievement Award. He attends the Stuyvesant High School, New York, New York, U.S.A.Naming citation (20040830/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tonivanov is today
Seen from above the solar system on 2026-10-14: Tonivanov is 2.17 au from the Sun and 3.06 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 18991 |
| Provisional designation | 2000 RD35 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.57 km (#16,131 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.268 |
| Absolute magnitude (H) | 15.39 |
| Orbital period | 3.44 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 2.11 – 2.44 au |
| Eccentricity | 0.0712 |
| Inclination | 5.00° |
| Closest distance between its orbit and Earth's (MOID) | 1.12 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 1 September 2000
- (18979) Henryfong
- (18980) Johannatang
- (18983) Allentran
- (18987) Irani
- (18997) Mizrahi
- (19002) Tongkexue
- (19003) Erinfrey
- (19005) Teckman
- (19801) Karenlemmon
- (20774) Zender
- (20775) Zhaohaibin
- (20776) Juliekrugler