(32615) 2001QU277


Object

Object (32615) 2001QU277
Diameter(1) 38 km
Dynamic class(1) trojan
Absolute magnitude 11.00
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 5.167892 ± 0.000001 au
Eccentricity 0.032380750 ± 0.000000123
Inclination 17.545661861 ± 0.000002455 °
Longitude of ascending node 100.417817 ± 0.000030 °
Argument of perihelia 223.797909 ± 0.000255 °
Mean anomaly 199.890423 ± 0.000249 °
Orbital period 11.75 yr

Ephemeris & Observations

Ephemeris version NIMAv3
Observation file (documentation) omc_ast_NIMAv3.txt
bsp file 32615_2001QU277_nima_v3.bsp
Date of first observation 1977-10-06
Date of last observation 2020-08-16
Number of observations used in the fit 1324
Number of rejected observations 3
Number of DES observations 7
Number of MPC observations 1319
Number of unpublished observations 1
RMS of observations 0.437 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2021-01 0.021 0.017
2021-07 0.030 0.028
2022-01 0.038 0.028
2022-07 0.061 0.045
2023-01 0.053 0.031
2023-07 0.089 0.044
2024-01 0.064 0.026
2024-07 0.090 0.034
2025-01 0.069 0.020

Ephemeris comparison

residual plot

Difference between NIMAv3 and JPL35 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