(24448) 2000QE42


Object

Object (24448) 2000QE42
Diameter(1) 31 km
Dynamic class(1) trojan
Absolute magnitude 11.40
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 5.161488 ± 0.000000 au
Eccentricity 0.052136704 ± 0.000000068
Inclination 8.849451230 ± 0.000001709 °
Longitude of ascending node 156.837281 ± 0.000030 °
Argument of perihelia 197.958896 ± 0.000077 °
Mean anomaly 188.388319 ± 0.000064 °
Orbital period 11.73 yr

Ephemeris & Observations

Ephemeris version NIMAv2
Observation file (documentation) omc_ast_NIMAv2.txt
bsp file 24448_2000QE42_nima_v2.bsp
Date of first observation 1988-10-09
Date of last observation 2021-06-15
Number of observations used in the fit 1333
Number of rejected observations 8
Number of DES observations 0
Number of MPC observations 1331
Number of unpublished observations 10
RMS of observations 0.430 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2021-01 0.004 0.005
2021-07 0.007 0.007
2022-01 0.009 0.007
2022-07 0.020 0.015
2023-01 0.019 0.012
2023-07 0.040 0.020
2024-01 0.033 0.015
2024-07 0.054 0.022
2025-01 0.049 0.017

Ephemeris comparison

residual plot

Difference between NIMAv2 and JPL31 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