(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 0.032380735 ± 0.000000121
Inclination 17.545661532 ± 0.000011153 °
Longitude of ascending node 100.417814 ± 0.000030 °
Argument of perihelia 223.797875 ± 0.000257 °
Mean anomaly 199.890462 ± 0.000253 °
Orbital period 11.75 yr

Ephemeris & Observations

Ephemeris version NIMAv1
Observation file (documentation) omc_ast_NIMAv1.txt
bsp file 32615_2001QU277_nima_v1.bsp
Date of first observation 1977-10-06
Date of last observation 2018-05-23
Number of observations used in the fit 854
Number of rejected observations 0
Number of DES observations 7
Number of MPC observations 847
Number of unpublished observations 0
RMS of observations 0.518 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 0.049 0.042
2018-07 0.038 0.031
2019-01 0.058 0.042
2019-07 0.051 0.034
2020-01 0.067 0.043
2020-07 0.069 0.042
2021-01 0.076 0.045
2021-07 0.093 0.055
2022-01 0.084 0.043

Ephemeris comparison

residual plot

Difference between NIMAv1 and JPL22 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.