| Minorplanet: | yes |
| Background: |
|
| 54598 Bienor | |
| Symbol: | (astrological) |
| Discovered: | 27 August 2000 |
| Mpc Name: | (54598) Bienor |
| Pronounced: | [1] |
| Adjective: | Bienorian |
| Mp Category: | Centaur  |
| Epoch: | 31 May 2020 (JD 2459000.5) |
| Semimajor: | 16.444AU |
| Perihelion: | 13.172AU |
| Aphelion: | 19.715abbr=onNaNabbr=on |
| Eccentricity: | 0.19894 |
| Period: | 66.68 yr (24355 d) |
| Inclination: | 20.745° |
| Asc Node: | 337.728° |
| Arg Peri: | 153.374° |
| Mean Diameter: | |
| Magnitude: | ~ 19.2 |
| Abs Magnitude: | 7.5 |
| Sidereal Day: | 9.14abbr=onNaNabbr=on |
| Albedo: | 0.03–0.05 |
| Mean Motion: | / day |
| Orbit Ref: |   |
| Observation Arc: | 24775 days (67.83 yr) |
| Uncertainty: | 0 |
| Moid: | 12.199AU |
| Jupiter Moid: | 7.873AU |
| Tisserand: | 3.575 |
54598 Bienor is a centaur that grazes the orbit of Uranus. It is named after the mythological centaur Bienor. Its closest approach to the Sun (perihelion) is 13.2 AU., Bienor is 14.2 AU from the Sun and will reach perihelion in January 2028. It measured approximately 198km (123miles) in diameter.