(3451) Mentor
This object has a more recent orbit available here
Object
| Object | (3451) Mentor |
| Diameter(1) | 126 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.51 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.165007 ± 0.000000 au |
| Eccentricity | 0.073754053 ± 0.000000050 |
| Inclination | 24.639984210 ± 0.000004896 ° |
| Longitude of ascending node | 179.557373 ± 0.000010 ° |
| Argument of perihelia | 130.687854 ± 0.000039 ° |
| Mean anomaly | 12.599827 ± 0.000038 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 3451_Mentor_nima_v4.bsp |
| Date of first observation | 1950-04-21 |
| Date of last observation | 2022-07-10 |
| Number of observations used in the fit | 3524 |
| Number of rejected observations | 18 |
| Number of DES observations | 0 |
| Number of MPC observations | 3540 |
| Number of unpublished observations | 2 |
| RMS of observations | 1.290 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) |
| 2022-01 | 0.025 | 0.017 |
| 2022-07 | 0.041 | 0.022 |
| 2023-01 | 0.033 | 0.016 |
| 2023-07 | 0.043 | 0.016 |
| 2024-01 | 0.041 | 0.012 |
| 2024-07 | 0.041 | 0.011 |
| 2025-01 | 0.047 | 0.013 |
| 2025-07 | 0.038 | 0.012 |
| 2026-01 | 0.049 | 0.018 |
Ephemeris comparison
Difference between NIMAv4 and JPL92 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.