| Minorplanet: | yes |
| Background: |
|
| 403 Cyane | |
| Discovered: | 18 May 1895 |
| Mpc Name: | (403) Cyane |
| Pronounced: | [1] |
| Adjective: | Cyanean, |
| Alt Names: | 1895 BX |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.80979AU |
| Perihelion: | 2.53799AU |
| Aphelion: | 3.08158abbr=onNaNabbr=on |
| Eccentricity: | 0.096731 |
| Period: | 4.71 yr (1720.3 d) |
| Inclination: | 9.14883° |
| Asc Node: | 244.411° |
| Arg Peri: | 255.602° |
| Rotation: | 12.283abbr=onNaNabbr=on |
| Abs Magnitude: | 9.0 |
| Mean Motion: | / day |
| Orbit Ref: | [2] |
| Observation Arc: | 120.89 yr (44155 d) |
| Uncertainty: | 0 |
403 Cyane is a typical Main belt asteroid.
It was discovered by Auguste Charlois on 18 May 1895 in Nice.