(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 | 6.90 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 33.236601 ± 0.003298 au |
| Eccentricity | 0.381294495 ± 0.000013163 |
| Inclination | 14.266681296 ± 0.000323545 ° |
| Longitude of ascending node | 132.846281 ± 0.001258 ° |
| Argument of perihelia | 282.260614 ± 0.011390 ° |
| Mean anomaly | 78.409078 ± 0.013816 ° |
| Orbital period | 191.62 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 33128_1998BU48_nima_v1.bsp |
| Date of first observation | 1998-01-22 |
| Date of last observation | 2019-03-09 |
| Number of observations used in the fit | 109 |
| Number of rejected observations | 0 |
| Number of DES observations | 0 |
| Number of MPC observations | 109 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.375 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.149 | 0.111 |
| 2018-07 | 0.191 | 0.110 |
| 2019-01 | 0.185 | 0.120 |
| 2019-07 | 0.187 | 0.113 |
| 2020-01 | 0.228 | 0.130 |
| 2020-07 | 0.189 | 0.117 |
| 2021-01 | 0.279 | 0.142 |
| 2021-07 | 0.201 | 0.122 |
| 2022-01 | 0.336 | 0.156 |
Ephemeris comparison
Difference between NIMAv1 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.