 Orbit diagram of980 Anacostia | |
| Discovery | |
|---|---|
| Discovered by | George Henry Peters |
| Discovery site | Washington, D.C. |
| Discovery date | 21 November 1921 |
| Designations | |
| (980) Anacostia | |
| Pronunciation | /ænəˈkɒstiə/[1] |
| 1921 W19 | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.01 yr (31782 days) |
| Aphelion | 3.2953 AU (492.97 Gm) |
| Perihelion | 2.1842 AU (326.75 Gm) |
| 2.7397 AU (409.85 Gm) | |
| Eccentricity | 0.20278 |
| 4.53yr (1656.4d) | |
| 317.515° | |
| 0° 13m 2.424s / day | |
| Inclination | 15.905° |
| 285.817° | |
| 70.143° | |
| Physical characteristics | |
| 43.095±0.8km | |
| 20.117 h (0.8382 d) | |
| 0.1723±0.006 | |
| 7.85 | |
980 Anacostia is aminor planet orbiting theSun that was discovered by American astronomerGeorge Henry Peters on 21 November 1921. The name recognizes theAnacostia River and an historic neighborhood of the same name in the city of Washington, D.C.[citation needed]
Measurements using theadaptive optics system at theW. M. Keck Observatory give a diameter of 70 ± 6 km. This is 23% smaller than the diameter estimated from theIRAS observatory data. The size ratio between the major and minor axes is 1.09.[3]
Polarimetric study of this asteroid reveals anomalous properties that suggests theregolith consists of a mixture of low and highalbedo material. This may have been caused by fragmentation of an asteroidsubstrate with the spectral properties of CO3/CV3carbonaceous chondrites.[4]
_mathilde.jpg) | This article about an asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
