| Minorplanet: | yes |
| Background: |
|
| 266 Aline | |
| Discovered: | 17 May 1887 |
| Mpc Name: | (266) Aline |
| Alt Names: | A887 KA |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.80394AU |
| Perihelion: | 2.36559AU |
| Aphelion: | 3.24229abbr=onNaNabbr=on |
| Eccentricity: | 0.15633 |
| Period: | 4.70 yr (1715.0 d) |
| Inclination: | 13.3989° |
| Asc Node: | 235.904° |
| Arg Peri: | 150.489° |
| Avg Speed: | 17.79 km/s |
| Dimensions: | 107.95 ± 6.62 km |
| Density: | 6.29 ± 1.32 g/cm3 |
| Rotation: | 13.018abbr=onNaNabbr=on 13.02 h |
| Abs Magnitude: | 8.80 |
| Mean Motion: | / day |
| Orbit Ref: | [1] |
| Observation Arc: | 124.91 yr (45623 d) |
| Uncertainty: | 0 |
266 Aline is a fairly large main belt asteroid that was discovered by Johann Palisa on 17 May 1887 in Vienna and is thought to have been named after the daughter of astronomer Edmund Weiss. It is a dark C-type asteroid and is probably composed of primitive carbonaceous material. 266 Aline is orbiting close to a 5:2 mean motion resonance with Jupiter, which is located at .
Photometric observations made in 2012 at the Organ Mesa Observatory in Las Cruces, New Mexico, produced a light curve with a period of 13.018 ± 0.001 hours and a brightness variation of 0.10 ± 0.01 in magnitude.
In 2001, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.41 AU. The resulting data yielded an effective diameter of .