(13438) Marthanalexander Main-belt Asteroid
Discovered on 7 December 1999 by LINEAR at Socorro.
Named in honor of Martha N. Alexander for mentoring a finalist in the 2001 Discovery Young Scientist Challenge (DYSC), a middle school science competition. Alexander is a teacher at the All Saints Episcopal School, Lubbock, Texas.Naming citation (20011002/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Marthanalexander is today
Seen from above the solar system on 2026-10-14: Marthanalexander is 2.10 au from the Sun and 1.83 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 13438 |
| Provisional designation | 1999 XD86 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.58 km (#16,108 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.291 |
| Absolute magnitude (H) | 15.26 |
| Orbital period | 3.37 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.98 – 2.52 au |
| Eccentricity | 0.119 |
| Inclination | 2.17° |
| Closest distance between its orbit and Earth's (MOID) | 0.994 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Martha
- (4664) Hanner
- (10863) Oye
- (20067) Marthanieves
- (20172) Martin
- (26744) Marthahaynes
- (56067) Argerich
- (100934) Marthanussbaum
- (175152) Marthafarkas
- (212403) Marthakusterer
- (299362) Marthacole
All asteroids named after someone called Martha
Also discovered on 7 December 1999
- (13845) Jillburnett
- (13848) Cioffi
- (13849) Dunn
- (13850) Erman
- (13852) Ford
- (13853) Jenniferfritz
- (14225) Alisahamilton
- (14226) Hamura
- (14230) Mariahines
- (14679) Susanreed
- (16118) Therberens
- (16119) Bronner