(3451) Mentor


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 (documentation) 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Number of unpublished observations 4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

residual plot

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

residual plot

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.

Previous NIMA versions