(12955) Alexdekoter Main-belt Asteroid
Discovered on 29 September 1973 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar.
Alex de Koter (b. 1964) is a Dutch astronomer who studies the most massive stars. From 2006 to 2021 he was chair of the Minnaert Committee for Communication and Education of the Netherlands Research School for Astronomy.Naming citation (WGSBN Bull. 5, #20, 5), IAU / Minor Planet Center, via NASA/JPL
Where Alexdekoter is today
Seen from above the solar system on 2026-10-14: Alexdekoter is 2.74 au from the Sun and 3.50 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12955 |
| Provisional designation | 2162 T-2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 2.35 km (#16,520 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.321 |
| Absolute magnitude (H) | 15.35 |
| Orbital period | 4.26 years |
| Semi-major axis | 2.63 au |
| Perihelion – aphelion | 2.42 – 2.84 au |
| Eccentricity | 0.0787 |
| Inclination | 4.45° |
| Closest distance between its orbit and Earth's (MOID) | 1.41 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Alex
- (9321) Alexkonopliv
- (13301) Hofsteen
- (14220) Alexgibbs
- (15021) Alexkardon
- (15032) Alexlevin
- (17130) Alexzhang
- (19155) Lifeson
- (23307) Alexramek
- (25091) Sanchez-Claudio
- (25701) Alexkeeler
- (28795) Alexelbert
- (33662) Tacescu
All asteroids named after someone called Alex
Also discovered on 29 September 1973
- (2049) Grietje
- (4357) Korinthos
- (4549) Burkhardt
- (4721) Atahualpa
- (4752) Myron
- (4876) Strabo
- (4978) Seitz
- (5151) Weerstra
- (5197) Rottmann
- (5243) Clasien
- (5244) Amphilochos
- (5266) Rauch