(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 | 7.54 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 16.511359 ± 0.000004 au |
| Eccentricity | 0.200887308 ± 0.000000138 |
| Inclination | 20.745243965 ± 0.000000760 ° |
| Longitude of ascending node | 337.704550 ± 0.000008 ° |
| Argument of perihelia | 152.495597 ± 0.000065 ° |
| Mean anomaly | 331.074863 ± 0.000046 ° |
| Orbital period | 67.09 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv19 |
| Observation file |
omc_ast_NIMAv19.txt |
| bsp file | 54598_Bienor_nima_v19.bsp |
| Date of first observation | 1953-01-12 |
| Date of last observation | 2023-03-12 |
| Number of observations used in the fit | 1251 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 935 |
| Number of unpublished observations | 322 |
| RMS of observations | 0.318 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv19 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.005 | 0.005 |
| 2023-07 | 0.005 | 0.005 |
| 2024-01 | 0.008 | 0.006 |
| 2024-07 | 0.009 | 0.007 |
| 2025-01 | 0.013 | 0.008 |
| 2025-07 | 0.013 | 0.009 |
| 2026-01 | 0.019 | 0.012 |
| 2026-07 | 0.018 | 0.013 |
| 2027-01 | 0.027 | 0.018 |
Ephemeris comparison
Difference between NIMAv19 and JPL68 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.