(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 | 8.54 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.190236 ± 0.000000 au |
| Eccentricity | 0.075601056 ± 0.000000007 |
| Inclination | 24.593693590 ± 0.000000155 ° |
| Longitude of ascending node | 179.529517 ± 0.000000 ° |
| Argument of perihelia | 134.009292 ± 0.000005 ° |
| Mean anomaly | 76.411850 ± 0.000003 ° |
| Orbital period | 11.82 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 3451_Mentor_nima_v6.bsp |
| Date of first observation | 1950-04-21 |
| Date of last observation | 2024-07-12 |
| Number of observations used in the fit | 5239 |
| Number of rejected observations | 22 |
| Number of DES observations | 0 |
| Number of MPC observations | 4626 |
| Number of unpublished observations | 7 |
| RMS of observations | 0.140 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) |
| 2024-01 | 0.009 | 0.001 |
| 2024-07 | 0.010 | 0.001 |
| 2025-01 | 0.012 | 0.001 |
| 2025-07 | 0.011 | 0.001 |
| 2026-01 | 0.014 | 0.001 |
| 2026-07 | 0.011 | 0.001 |
| 2027-01 | 0.015 | 0.001 |
| 2027-07 | 0.011 | 0.000 |
| 2028-01 | 0.015 | 0.001 |
Ephemeris comparison
Difference between NIMAv6 and JPL105 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.