(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 | 6.95 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 33.112138 ± 0.001726 au |
| Eccentricity | 0.385534228 ± 0.000005682 |
| Inclination | 14.273522781 ± 0.000053130 ° |
| Longitude of ascending node | 132.870589 ± 0.000146 ° |
| Argument of perihelia | 281.596013 ± 0.005323 ° |
| Mean anomaly | 84.877859 ± 0.007580 ° |
| Orbital period | 190.54 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 33128_1998BU48_nima_v4.bsp |
| Date of first observation | 1998-01-22 |
| Date of last observation | 2022-03-06 |
| Number of observations used in the fit | 214 |
| Number of rejected observations | 0 |
| Number of DES observations | 0 |
| Number of MPC observations | 214 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.294 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.165 | 0.091 |
| 2022-07 | 0.120 | 0.077 |
| 2023-01 | 0.193 | 0.100 |
| 2023-07 | 0.135 | 0.082 |
| 2024-01 | 0.225 | 0.109 |
| 2024-07 | 0.154 | 0.088 |
| 2025-01 | 0.259 | 0.119 |
| 2025-07 | 0.178 | 0.095 |
| 2026-01 | 0.298 | 0.131 |
Ephemeris comparison
Difference between NIMAv4 and JPL17 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.