(32615) 2001QU277


Object

Object (32615) 2001QU277
Diameter(1) 38 km
Dynamic class(1) trojan
Absolute magnitude 11.17
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2460600.5
Semi major axis 5.148402 ± 0.000000 au
Eccentricity 0.032605069 ± 0.000000022
Inclination 17.559679620 ± 0.000001053 °
Longitude of ascending node 100.403889 ± 0.000003 °
Argument of perihelia 228.327072 ± 0.000037 °
Mean anomaly 3.729579 ± 0.000043 °
Orbital period 11.68 yr

Ephemeris & Observations

Ephemeris version NIMAv6
Observation file (documentation) omc_ast_NIMAv6.txt
bsp file 32615_2001QU277_nima_v6.bsp
Date of first observation 1977-10-06
Date of last observation 2024-07-07
Number of observations used in the fit 2873
Number of rejected observations 293
Number of DES observations 7
Number of MPC observations 2840
Number of unpublished observations 1
RMS of observations 0.109 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 0.025 0.004
2024-07 0.040 0.009
2025-01 0.032 0.007
2025-07 0.038 0.017
2026-01 0.037 0.015
2026-07 0.035 0.017
2027-01 0.041 0.020
2027-07 0.033 0.014
2028-01 0.045 0.019

Ephemeris comparison

residual plot

Difference between NIMAv6 and JPL51 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