(68444) 2001RH142
This object has a more recent orbit available here
Object
| Object | (68444) 2001RH142 |
| Diameter(1) | 30 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 11.66 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.200953 ± 0.000000 au |
| Eccentricity | 0.025764028 ± 0.000000082 |
| Inclination | 30.073031057 ± 0.000005494 ° |
| Longitude of ascending node | 123.393168 ± 0.000017 ° |
| Argument of perihelia | 85.803986 ± 0.000130 ° |
| Mean anomaly | 129.698168 ± 0.000123 ° |
| Orbital period | 11.86 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 68444_2001RH142_nima_v5.bsp |
| Date of first observation | 1994-01-17 |
| Date of last observation | 2024-07-02 |
| Number of observations used in the fit | 1790 |
| Number of rejected observations | 239 |
| Number of DES observations | 15 |
| Number of MPC observations | 1991 |
| Number of unpublished observations | 23 |
| RMS of observations | 0.451 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 | 0.035 | 0.027 |
| 2024-07 | 0.050 | 0.033 |
| 2025-01 | 0.042 | 0.025 |
| 2025-07 | 0.052 | 0.028 |
| 2026-01 | 0.051 | 0.023 |
| 2026-07 | 0.053 | 0.027 |
| 2027-01 | 0.063 | 0.031 |
| 2027-07 | 0.055 | 0.031 |
| 2028-01 | 0.077 | 0.043 |
Ephemeris comparison
Difference between NIMAv5 and JPL41 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.