(25531) Lessek Main-belt Asteroid
Discovered on 12 December 1999 by LINEAR at Socorro.
Justin Lessek mentored a finalist in the 2009 Intel Science Talent Search (STS), a science competition for high school seniors. He teaches at the Lincoln Park High School, Chicago, Illinois.Naming citation (20090311/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Lessek is today
Seen from above the solar system on 2026-10-14: Lessek is 2.33 au from the Sun and 2.80 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 25531 |
| Provisional designation | 1999 XE133 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 7.69 hours |
| Absolute magnitude (H) | 14.63 |
| Orbital period | 3.53 years |
| Semi-major axis | 2.32 au |
| Perihelion – aphelion | 1.93 – 2.71 au |
| Eccentricity | 0.168 |
| Inclination | 8.99° |
| Closest distance between its orbit and Earth's (MOID) | 0.929 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Justin
- (11231) Schiavo
- (12571) Occhiogrosso
- (13585) Justinsmith
- (16177) Pelzer
- (19593) Justinkoh
- (21394) Justinbecker
- (21401) Justinkovac
- (21747) Justsolomon
- (26666) Justinto
- (27382) Justinbarber
- (31513) Lafazan
- (34278) Justinxie
All asteroids named after someone called Justin
Also discovered on 12 December 1999
- (14234) Davidhoover
- (16148) Amaraifeji
- (17193) Alexeybaran
- (20737) Sungkicho
- (22038) Margarshain
- (24259) Chriswalker
- (24261) Judilegault
- (24289) Anthonypalma
- (24292) Susanragan
- (25570) Kesun
- (25573) Wanghaoyu
- (26422) Marekbuchman