(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 | 0.069160820 ± 0.000000064 |
| Inclination | 24.654198676 ± 0.000005125 ° |
| Longitude of ascending node | 179.660769 ± 0.000010 ° |
| Argument of perihelia | 131.488068 ± 0.000058 ° |
| Mean anomaly | 236.386312 ± 0.000058 ° |
| Orbital period | 11.65 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 3451_Mentor_nima_v1.bsp |
| Date of first observation | 1950-04-21 |
| Date of last observation | 2019-01-29 |
| Number of observations used in the fit | 2009 |
| Number of rejected observations | 10 |
| Number of DES observations | 0 |
| Number of MPC observations | 2019 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.517 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.018 | 0.014 |
| 2018-07 | 0.017 | 0.014 |
| 2019-01 | 0.022 | 0.015 |
| 2019-07 | 0.026 | 0.019 |
| 2020-01 | 0.027 | 0.017 |
| 2020-07 | 0.039 | 0.023 |
| 2021-01 | 0.032 | 0.017 |
| 2021-07 | 0.050 | 0.023 |
| 2022-01 | 0.036 | 0.014 |
Ephemeris comparison
Difference between NIMAv1 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.