(20642) Laurajohnson Main-belt Asteroid
Discovered on 4 October 1999 by LINEAR at Socorro.
Laura Johnson (b. 1987) was awarded second place in the 2004 Intel International Science and Engineering Fair for her botany team project. She attends the Upper Arlington High School, Upper Arlington, Ohio, U.S.A.Naming citation (20041226/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Laurajohnson is today
Seen from above the solar system on 2026-10-14: Laurajohnson is 2.94 au from the Sun and 2.14 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 20642 |
| Provisional designation | 1999 TC124 |
| Orbit class | Main-belt Asteroid |
| Diameter | 7.27 km (#7,350 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0770 |
| Absolute magnitude (H) | 14.38 |
| Orbital period | 5.50 years |
| Semi-major axis | 3.11 au |
| Perihelion – aphelion | 2.71 – 3.52 au |
| Eccentricity | 0.129 |
| Inclination | 5.20° |
| Closest distance between its orbit and Earth's (MOID) | 1.73 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Laura
- (13001) Woodney
- (15742) Laurabassi
- (18128) Wysner
- (18709) Laurawong
- (20475) Lauraparro
- (20814) Laurajones
- (20870) Kaningher
- (21463) Nickerson
- (28677) Laurakowalski
- (33400) Laurapierson
- (34365) Laurareilly
- (52570) Lauraco
All asteroids named after someone called Laura
Also discovered on 4 October 1999
- (13407) Ikukomakino
- (15093) Lestermackey
- (15509) Annejing
- (15510) Phoeberounds
- (16088) Jessgoldstein
- (17179) Codina
- (20626) Rider-Stokes
- (20638) Lingchen
- (20639) Michellouie
- (20641) Yenuanchen
- (21804) Vaclavneumann
- (21815) Fanyang