(54598) Bienor
This object has a more recent orbit available here
Object
| Object | (54598) Bienor |
| Diameter(1) | 198 km |
| Dynamic class(1) | Centaur |
| Absolute magnitude | 7.50 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 16.432838 ± 0.000004 au |
| Eccentricity | 0.199189654 ± 0.000000291 |
| Inclination | 20.744624922 ± 0.000004461 ° |
| Longitude of ascending node | 337.775889 ± 0.000031 ° |
| Argument of perihelia | 153.628323 ± 0.000068 ° |
| Mean anomaly | 312.342629 ± 0.000054 ° |
| Orbital period | 66.62 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv16 |
| Observation file |
omc_ast_NIMAv16.txt |
| bsp file | 54598_Bienor_nima_v16.bsp |
| Date of first observation | 1953-01-12 |
| Date of last observation | 2020-11-12 |
| Number of observations used in the fit | 997 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 682 |
| Number of unpublished observations | 321 |
| RMS of observations | 0.283 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv16 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.021 | 0.012 |
| 2021-07 | 0.026 | 0.012 |
| 2022-01 | 0.033 | 0.016 |
| 2022-07 | 0.037 | 0.017 |
| 2023-01 | 0.048 | 0.021 |
| 2023-07 | 0.050 | 0.023 |
| 2024-01 | 0.064 | 0.029 |
| 2024-07 | 0.062 | 0.032 |
| 2025-01 | 0.081 | 0.041 |
Ephemeris comparison
Difference between NIMAv16 and JPL57 in right ascension (weighted by cos δ) and in declination.
Gray area represents the 1-σ uncertainty of NIMA ephemeris. Green dots represent the DES observations.