(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 | 0.073754076 ± 0.000000044 |
| Inclination | 24.639985265 ± 0.000004647 ° |
| Longitude of ascending node | 179.557375 ± 0.000009 ° |
| Argument of perihelia | 130.687840 ± 0.000037 ° |
| Mean anomaly | 12.599842 ± 0.000035 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 3451_Mentor_nima_v5.bsp |
| Date of first observation | 1950-04-21 |
| Date of last observation | 2023-07-04 |
| Number of observations used in the fit | 4118 |
| Number of rejected observations | 21 |
| Number of DES observations | 0 |
| Number of MPC observations | 4135 |
| Number of unpublished observations | 4 |
| RMS of observations | 1.195 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.026 | 0.015 |
| 2023-07 | 0.034 | 0.014 |
| 2024-01 | 0.033 | 0.012 |
| 2024-07 | 0.035 | 0.010 |
| 2025-01 | 0.041 | 0.013 |
| 2025-07 | 0.034 | 0.011 |
| 2026-01 | 0.045 | 0.017 |
| 2026-07 | 0.032 | 0.014 |
| 2027-01 | 0.044 | 0.021 |
Ephemeris comparison
Difference between NIMAv5 and JPL98 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.