(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 0.073754053 ± 0.000000050
Inclination 24.639984210 ± 0.000004896 °
Longitude of ascending node 179.557373 ± 0.000010 °
Argument of perihelia 130.687854 ± 0.000039 °
Mean anomaly 12.599827 ± 0.000038 °
Orbital period 11.74 yr

Ephemeris & Observations

Ephemeris version NIMAv4
Observation file (documentation) omc_ast_NIMAv4.txt
bsp file 3451_Mentor_nima_v4.bsp
Date of first observation 1950-04-21
Date of last observation 2022-07-10
Number of observations used in the fit 3524
Number of rejected observations 18
Number of DES observations 0
Number of MPC observations 3540
Number of unpublished observations 2
RMS of observations 1.290 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2022-01 0.025 0.017
2022-07 0.041 0.022
2023-01 0.033 0.016
2023-07 0.043 0.016
2024-01 0.041 0.012
2024-07 0.041 0.011
2025-01 0.047 0.013
2025-07 0.038 0.012
2026-01 0.049 0.018

Ephemeris comparison

residual plot

Difference between NIMAv4 and JPL92 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