(33128) 1998BU48
Object
| Object |
(33128) 1998BU48 |
| Diameter(1) |
213 km |
| Dynamic class(1) |
Centaur |
| Absolute magnitude |
6.94 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
33.242113 ± 0.001722 au |
| Eccentricity |
0.386179448 ± 0.000005819 |
| Inclination |
14.244428404 ± 0.000052829 ° |
| Longitude of ascending node |
132.729637 ± 0.000146 ° |
| Argument of perihelia |
282.284033 ± 0.005262 ° |
| Mean anomaly |
88.175924 ± 0.007796 ° |
| Orbital period |
191.66 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv5 |
| Observation file (documentation) |
omc_ast_NIMAv5.txt |
| bsp file |
33128_1998BU48_nima_v5.bsp |
| Date of first observation |
1998-01-22 |
| Date of last observation |
2024-01-21 |
| Number of observations used in the fit |
217 |
| Number of rejected observations |
0 |
| Number of DES observations |
0 |
| Number of MPC observations |
217 |
| Number of unpublished observations |
0 |
| RMS of observations |
0.293 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.219 |
0.108 |
| 2024-07 |
0.152 |
0.088 |
| 2025-01 |
0.253 |
0.118 |
| 2025-07 |
0.175 |
0.094 |
| 2026-01 |
0.290 |
0.129 |
| 2026-07 |
0.203 |
0.102 |
| 2027-01 |
0.331 |
0.141 |
| 2027-07 |
0.235 |
0.110 |
| 2028-01 |
0.375 |
0.154 |
Ephemeris comparison
Difference between NIMAv5 and JPL18 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.
Previous NIMA versions