(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 0.069160820 ± 0.000000064
Inclination 24.654198676 ± 0.000005125 °
Longitude of ascending node 179.660769 ± 0.000010 °
Argument of perihelia 131.488068 ± 0.000058 °
Mean anomaly 236.386312 ± 0.000058 °
Orbital period 11.65 yr

Ephemeris & Observations

Ephemeris version NIMAv1
Observation file (documentation) omc_ast_NIMAv1.txt
bsp file 3451_Mentor_nima_v1.bsp
Date of first observation 1950-04-21
Date of last observation 2019-01-29
Number of observations used in the fit 2009
Number of rejected observations 10
Number of DES observations 0
Number of MPC observations 2019
Number of unpublished observations 0
RMS of observations 0.517 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2018-01 0.018 0.014
2018-07 0.017 0.014
2019-01 0.022 0.015
2019-07 0.026 0.019
2020-01 0.027 0.017
2020-07 0.039 0.023
2021-01 0.032 0.017
2021-07 0.050 0.023
2022-01 0.036 0.014

Ephemeris comparison

residual plot

Difference between NIMAv1 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.