(20554) Myriebe Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
My E. I. Riebe (b. 1986) is a Swedish cosmochemist working in Switzerland. She studies the evolution of volatile elements and organics in the Solar System through isotopic analyses of meteorites and cosmic dust.Naming citation (WGSBN Bull. 6, #11, 27), IAU / Minor Planet Center, via NASA/JPL
Where Myriebe is today
Seen from above the solar system on 2026-10-14: Myriebe is 3.23 au from the Sun and 2.25 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20554 |
| Provisional designation | 1999 RW114 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.22 km (#7,396 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.162 |
| Rotation period | 8.35 hours |
| Absolute magnitude (H) | 13.62 |
| Orbital period | 5.32 years |
| Semi-major axis | 3.05 au |
| Perihelion – aphelion | 2.75 – 3.35 au |
| Eccentricity | 0.0987 |
| Inclination | 8.02° |
| Closest distance between its orbit and Earth's (MOID) | 1.74 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 September 1999
- (12127) Mamiya
- (12130) Mousa
- (12589) Davidanand
- (12590) Ballantine
- (12591) Bergey
- (12592) Brianchen
- (12593) Shashlov
- (12594) Sidorclare
- (12595) Amandashaw
- (12596) Shukla
- (12597) Williamdaniel
- (12598) Sierra