(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 | 8.50 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.138179 ± 0.000000 au |
| Eccentricity | 0.069160786 ± 0.000000064 |
| Inclination | 24.654198862 ± 0.000005316 ° |
| Longitude of ascending node | 179.660764 ± 0.000010 ° |
| Argument of perihelia | 131.488074 ± 0.000076 ° |
| Mean anomaly | 236.386309 ± 0.000073 ° |
| Orbital period | 11.65 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 3451_Mentor_nima_v3.bsp |
| Date of first observation | 1950-04-21 |
| Date of last observation | 2020-08-04 |
| Number of observations used in the fit | 2755 |
| Number of rejected observations | 18 |
| Number of DES observations | 0 |
| Number of MPC observations | 2769 |
| Number of unpublished observations | 4 |
| RMS of observations | 0.451 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.015 | 0.012 |
| 2020-07 | 0.023 | 0.020 |
| 2021-01 | 0.024 | 0.017 |
| 2021-07 | 0.043 | 0.027 |
| 2022-01 | 0.034 | 0.019 |
| 2022-07 | 0.055 | 0.026 |
| 2023-01 | 0.044 | 0.018 |
| 2023-07 | 0.054 | 0.017 |
| 2024-01 | 0.051 | 0.013 |
Ephemeris comparison
Difference between NIMAv3 and JPL70 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.