(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 | 11.50 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.216921 ± 0.000001 au |
| Eccentricity | 0.027830824 ± 0.000000181 |
| Inclination | 30.053460046 ± 0.000006532 ° |
| Longitude of ascending node | 123.391528 ± 0.000021 ° |
| Argument of perihelia | 87.086856 ± 0.000183 ° |
| Mean anomaly | 322.445511 ± 0.000174 ° |
| Orbital period | 11.92 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 68444_2001RH142_nima_v2.bsp |
| Date of first observation | 1994-01-17 |
| Date of last observation | 2021-05-12 |
| Number of observations used in the fit | 1042 |
| Number of rejected observations | 2 |
| Number of DES observations | 15 |
| Number of MPC observations | 1012 |
| Number of unpublished observations | 17 |
| RMS of observations | 0.420 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.034 | 0.025 |
| 2021-07 | 0.046 | 0.034 |
| 2022-01 | 0.041 | 0.031 |
| 2022-07 | 0.065 | 0.048 |
| 2023-01 | 0.048 | 0.035 |
| 2023-07 | 0.075 | 0.049 |
| 2024-01 | 0.053 | 0.034 |
| 2024-07 | 0.072 | 0.040 |
| 2025-01 | 0.057 | 0.029 |
Ephemeris comparison
Difference between NIMAv2 and JPL27 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.