(3451) Mentor


Object

Object (3451) Mentor
Diameter(1) 126 km
Dynamic class(1) trojan
Absolute magnitude 8.54
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2460600.5
Semi major axis 5.190236 ± 0.000000 au
Eccentricity 0.075601056 ± 0.000000007
Inclination 24.593693590 ± 0.000000155 °
Longitude of ascending node 179.529517 ± 0.000000 °
Argument of perihelia 134.009292 ± 0.000005 °
Mean anomaly 76.411850 ± 0.000003 °
Orbital period 11.82 yr

Ephemeris & Observations

Ephemeris version NIMAv6
Observation file (documentation) omc_ast_NIMAv6.txt
bsp file 3451_Mentor_nima_v6.bsp
Date of first observation 1950-04-21
Date of last observation 2024-07-12
Number of observations used in the fit 5239
Number of rejected observations 22
Number of DES observations 0
Number of MPC observations 4626
Number of unpublished observations 7
RMS of observations 0.140 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2024-01 0.009 0.001
2024-07 0.010 0.001
2025-01 0.012 0.001
2025-07 0.011 0.001
2026-01 0.014 0.001
2026-07 0.011 0.001
2027-01 0.015 0.001
2027-07 0.011 0.000
2028-01 0.015 0.001

Ephemeris comparison

residual plot

Difference between NIMAv6 and JPL105 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