(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 | 0.069160878 ± 0.000000027 |
| Inclination | 24.654198031 ± 0.000001983 ° |
| Longitude of ascending node | 179.660770 ± 0.000008 ° |
| Argument of perihelia | 131.488101 ± 0.000043 ° |
| Mean anomaly | 236.386275 ± 0.000048 ° |
| Orbital period | 11.65 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 3451_Mentor_nima_v2.bsp |
| Date of first observation | 1950-04-21 |
| Date of last observation | 2019-03-02 |
| Number of observations used in the fit | 2248 |
| Number of rejected observations | 12 |
| Number of DES observations | 0 |
| Number of MPC observations | 1970 |
| Number of unpublished observations | 3 |
| RMS of observations | 0.096 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.031 | 0.009 |
| 2019-07 | 0.038 | 0.011 |
| 2020-01 | 0.041 | 0.008 |
| 2020-07 | 0.060 | 0.009 |
| 2021-01 | 0.050 | 0.004 |
| 2021-07 | 0.077 | 0.004 |
| 2022-01 | 0.055 | 0.002 |
| 2022-07 | 0.074 | 0.006 |
| 2023-01 | 0.056 | 0.006 |
Ephemeris comparison
Difference between NIMAv2 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.