(33128) 1998BU48
This object has a more recent orbit available here
Object
| Object | (33128) 1998BU48 |
| Diameter(1) | 213 km |
| Dynamic class(1) | Centaur |
| Absolute magnitude | 6.98 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2456784.185916434 |
| Semi major axis | 33.441131 ± 0.001855 au |
| Eccentricity | 0.384255085 ± 0.000007592 |
| Inclination | 14.224402160 ± 0.000200374 ° |
| Longitude of ascending node | 132.696419 ± 0.000790 ° |
| Argument of perihelia | 283.096653 ± 0.006352 ° |
| Mean anomaly | 67.926853 ± 0.006767 ° |
| Orbital period | 193.39 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 33128_1998BU48_nima_v3.bsp |
| Date of first observation | 1998-01-22 |
| Date of last observation | 2020-04-17 |
| Number of observations used in the fit | 204 |
| Number of rejected observations | 0 |
| Number of DES observations | 0 |
| Number of MPC observations | 204 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.300 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.174 | 0.094 |
| 2021-07 | 0.127 | 0.078 |
| 2022-01 | 0.205 | 0.103 |
| 2022-07 | 0.145 | 0.084 |
| 2023-01 | 0.239 | 0.113 |
| 2023-07 | 0.167 | 0.091 |
| 2024-01 | 0.277 | 0.123 |
| 2024-07 | 0.193 | 0.098 |
| 2025-01 | 0.318 | 0.135 |
Ephemeris comparison
Difference between NIMAv3 and JPL10 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.