(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 | 11.62 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.206863 ± 0.000000 au |
| Eccentricity | 0.025970416 ± 0.000000084 |
| Inclination | 30.059454949 ± 0.000005500 ° |
| Longitude of ascending node | 123.392552 ± 0.000018 ° |
| Argument of perihelia | 88.117315 ± 0.000132 ° |
| Mean anomaly | 60.923633 ± 0.000126 ° |
| Orbital period | 11.88 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 68444_2001RH142_nima_v4.bsp |
| Date of first observation | 1994-01-17 |
| Date of last observation | 2023-07-01 |
| Number of observations used in the fit | 1680 |
| Number of rejected observations | 238 |
| Number of DES observations | 15 |
| Number of MPC observations | 1880 |
| Number of unpublished observations | 23 |
| RMS of observations | 0.457 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) |
| 2023-01 | 0.031 | 0.027 |
| 2023-07 | 0.049 | 0.039 |
| 2024-01 | 0.037 | 0.028 |
| 2024-07 | 0.053 | 0.035 |
| 2025-01 | 0.044 | 0.026 |
| 2025-07 | 0.054 | 0.028 |
| 2026-01 | 0.053 | 0.024 |
| 2026-07 | 0.054 | 0.028 |
| 2027-01 | 0.064 | 0.031 |
Ephemeris comparison
Difference between NIMAv4 and JPL36 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.