(3451) Mentor


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 (documentation) 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Number of unpublished observations 4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

residual plot

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

residual plot

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.

Previous NIMA versions