(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 ± 0.000002 au |
| Eccentricity | 0.027830736 ± 0.000000193 |
| Inclination | 30.053458879 ± 0.000010476 ° |
| Longitude of ascending node | 123.391525 ± 0.000023 ° |
| Argument of perihelia | 87.087025 ± 0.000249 ° |
| Mean anomaly | 322.445330 ± 0.000233 ° |
| Orbital period | 11.92 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 68444_2001RH142_nima_v1.bsp |
| Date of first observation | 1994-01-17 |
| Date of last observation | 2018-04-05 |
| Number of observations used in the fit | 586 |
| Number of rejected observations | 1 |
| Number of DES observations | 15 |
| Number of MPC observations | 572 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.490 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.062 | 0.049 |
| 2018-07 | 0.048 | 0.036 |
| 2019-01 | 0.077 | 0.042 |
| 2019-07 | 0.069 | 0.033 |
| 2020-01 | 0.089 | 0.041 |
| 2020-07 | 0.097 | 0.039 |
| 2021-01 | 0.095 | 0.048 |
| 2021-07 | 0.124 | 0.062 |
| 2022-01 | 0.098 | 0.052 |
Ephemeris comparison
Difference between NIMAv1 and JPL16 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.