(9142) Rhesus
Object
| Object |
(9142) Rhesus |
| Diameter(1) |
45 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
10.71 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2459800.5 |
| Semi major axis |
5.160007 ± 0.000000 au |
| Eccentricity |
0.130895882 ± 0.000000050 |
| Inclination |
12.807325524 ± 0.000004081 ° |
| Longitude of ascending node |
141.200655 ± 0.000027 ° |
| Argument of perihelia |
173.880566 ± 0.000038 ° |
| Mean anomaly |
333.013814 ± 0.000028 ° |
| Orbital period |
11.72 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv6 |
| Observation file (documentation) |
omc_ast_NIMAv6.txt |
| bsp file |
9142_Rhesus_nima_v6.bsp |
| Date of first observation |
1954-12-22 |
| Date of last observation |
2023-07-03 |
| Number of observations used in the fit |
2759 |
| Number of rejected observations |
252 |
| Number of DES observations |
5 |
| Number of MPC observations |
3003 |
| Number of unpublished observations |
3 |
| RMS of observations |
0.471 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.035 |
0.021 |
| 2023-07 |
0.060 |
0.028 |
| 2024-01 |
0.045 |
0.017 |
| 2024-07 |
0.054 |
0.018 |
| 2025-01 |
0.051 |
0.014 |
| 2025-07 |
0.047 |
0.015 |
| 2026-01 |
0.055 |
0.021 |
| 2026-07 |
0.043 |
0.018 |
| 2027-01 |
0.057 |
0.028 |
Ephemeris comparison
Difference between NIMAv6 and JPL48 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