(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 | 16.432831 ± 0.000016 au |
| Eccentricity | 0.199189692 ± 0.000000305 |
| Inclination | 20.744624253 ± 0.000009766 ° |
| Longitude of ascending node | 337.775881 ± 0.000048 ° |
| Argument of perihelia | 153.628435 ± 0.000261 ° |
| Mean anomaly | 312.342549 ± 0.000179 ° |
| Orbital period | 66.62 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv15 |
| Observation file |
omc_ast_NIMAv15.txt |
| bsp file | 54598_Bienor_nima_v15.bsp |
| Date of first observation | 1975-06-08 |
| Date of last observation | 2020-07-19 |
| Number of observations used in the fit | 936 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 626 |
| Number of unpublished observations | 316 |
| RMS of observations | 0.280 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv15 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.013 | 0.008 |
| 2020-07 | 0.024 | 0.009 |
| 2021-01 | 0.027 | 0.012 |
| 2021-07 | 0.038 | 0.013 |
| 2022-01 | 0.046 | 0.016 |
| 2022-07 | 0.056 | 0.019 |
| 2023-01 | 0.072 | 0.022 |
| 2023-07 | 0.077 | 0.029 |
| 2024-01 | 0.102 | 0.035 |
Ephemeris comparison
Difference between NIMAv15 and JPL45 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.