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.[2] As of 2020, Bienor is 14.2 AU from the Sun[7] and will reach perihelion in January 2028.[2]
| Discovery | |
|---|---|
| Discovered by | DES |
| Discovery site | Cerro Tololo Obs. |
| Discovery date | 27 August 2000 |
| Designations | |
MPC designation | (54598) Bienor |
| Pronunciation | /baɪˈiːnɔːr/[3] |
Named after | Biānor[1] |
Alternative designations | 2000 QC243 |
Minor planet category | Centaur [2] |
| Adjectives | Bienorian /baɪ.ɪˈnɔːriən/ |
| Orbital characteristics [2] | |
| 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) |
Semi-major axis | 16.444 AU (2.4600 Tm) |
| Eccentricity | 0.19894 |
Orbital period | 66.68 yr (24355 d) |
Average orbital speed | 7.26 km/s |
Mean anomaly | 318.473° |
Mean motion | 0° 0m 53.039s / day |
| Inclination | 20.745° |
Longitude of ascending node | 337.728° |
Argument of perihelion | 153.374° |
| Earth MOID | 12.199 AU (1.8249 Tm) |
| Jupiter MOID | 7.873 AU (1.1778 Tm) |
| TJupiter | 3.575 |
| Physical characteristics | |
| Dimensions | 207±30 km[4] 187.5±15.5 km[5] |
Sidereal rotation period | 9.14 h (0.381 d)[2] |
Geometric albedo | 0.03–0.05[4] 0.05±0.019[5] |
| Temperature | ~ 69 K |
Spectral type | B–V = 0.711±0.059[6] V–R = 0.476±0.046[6] |
Apparent magnitude | ~ 19.2[7] |
Absolute magnitude (H) | 7.5[2] |
| This article uses material from the Wikipedia article Metasyntactic variable, which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License. |