(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 | 16.432837 ± 0.000014 au |
| Eccentricity | 0.199189595 ± 0.000000562 |
| Inclination | 20.744627269 ± 0.000015042 ° |
| Longitude of ascending node | 337.775880 ± 0.000062 ° |
| Argument of perihelia | 153.628341 ± 0.000237 ° |
| Mean anomaly | 312.342616 ± 0.000145 ° |
| Orbital period | 66.62 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv13 |
| Observation file |
omc_ast_NIMAv13.txt |
| bsp file | 54598_Bienor_nima_v13.bsp |
| Date of first observation | 1975-06-08 |
| Date of last observation | 2018-04-02 |
| Number of observations used in the fit | 516 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 275 |
| Number of unpublished observations | 254 |
| RMS of observations | 0.232 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv13 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.009 | 0.009 |
| 2018-07 | 0.020 | 0.009 |
| 2019-01 | 0.019 | 0.014 |
| 2019-07 | 0.038 | 0.013 |
| 2020-01 | 0.041 | 0.020 |
| 2020-07 | 0.062 | 0.017 |
| 2021-01 | 0.073 | 0.024 |
| 2021-07 | 0.092 | 0.021 |
| 2022-01 | 0.113 | 0.027 |
Ephemeris comparison
Difference between NIMAv13 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.