(33128) 1998BU48
Object
| Object |
(33128) 1998BU48 |
| Diameter(1) |
213 km |
| Dynamic class(1) |
Centaur |
| Absolute magnitude |
6.95 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions