(25457) Mariannamao Main-belt Asteroid
Discovered on 5 December 1999 by LINEAR at Socorro.
Marianna Yuling Mao (b. 1991) is a finalist in the 2009 Intel Science Talent Search (STS), a science competition for high school seniors, for her physics project. She attends the Mission San Jose High School, Fremont, California.Naming citation (20090311/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Mariannamao is today
Seen from above the solar system on 2026-10-14: Mariannamao is 3.12 au from the Sun and 2.68 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 25457 |
| Provisional designation | 1999 XH13 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.01 km (#8,912 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0490 |
| Rotation period | 8.47 hours |
| Absolute magnitude (H) | 14.97 |
| Orbital period | 4.69 years |
| Semi-major axis | 2.80 au |
| Perihelion – aphelion | 2.35 – 3.25 au |
| Eccentricity | 0.160 |
| Inclination | 8.53° |
| Closest distance between its orbit and Earth's (MOID) | 1.39 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 5 December 1999
- (13858) Ericchristensen
- (14232) Curtismiller
- (14682) Davidhirsch
- (16112) Vitaris
- (20711) Seijisugita
- (20712) Shashiganesh
- (20725) Juliuscsotonyi
- (21989) Werntz
- (22022) Gould
- (22025) Dorisdaou
- (22026) Lindabillings
- (22027) Romanakofler