54598 Bienor
| Discovery | |
|---|---|
| Discovered by | DES |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 27 August 2000 |
| Designations | |
| (54598) Bienor | |
| Pronunciation | /baɪˈiːnɔːr/ |
Named after | Biēnor |
| 2000 QC243 | |
| Centaur | |
| Adjectives | Bienorian /baɪ.ɪˈnɔːriən/ |
| Symbol | (astrological) |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24775 days (67.83 yr) |
| Aphelion | 19.715 AU (2.9493 Tm) |
| Perihelion | 13.172 AU (1.9705 Tm) |
| 16.444 AU (2.4600 Tm) | |
| Eccentricity | 0.19894 |
| 66.68 yr (24355 d) | |
Average orbital speed | 7.26 km/s |
| 318.473° | |
| 0° 0m 53.039s / day | |
| Inclination | 20.745° |
| 337.728° | |
| 153.374° | |
| Earth MOID | 12.199 AU (1.8249 Tm) |
| Jupiter MOID | 7.873 AU (1.1778 Tm) |
| TJupiter | 3.575 |
| Physical characteristics | |
| Dimensions | a,b,c=127±5, 55±4, 45±4 km |
| 187.5±15.5 km 198 km 207±30 km | |
| 9.1736 ± 0.0002 h | |
| 9.14 h (0.381 d) | |
| 0.03–0.05 0.05±0.019 0.065±0.005 | |
| Temperature | ~ 69 K |
| BR B–V = 0.711±0.059 V–R = 0.476±0.046 | |
| ~ 19.2 | |
| 7.5 | |
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54598 Bienor /baɪˈiːnɔːr/ 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. As of 2020, Bienor is 14.2 AU from the Sun and will reach perihelion in January 2028. It measured approximately 198 kilometers (120 miles) in diameter. Through the analysis of rotational light curves and stellar occultations, it has been determined that the object has a highly elongated ellipsoidal shape. Its light curve is consistent with surface deformations, regions with significant albedo variations, or even the possible presence of a moon.