(32615) 2001QU277


This object has a more recent orbit available here

Object

Object (32615) 2001QU277
Diameter(1) 38 km
Dynamic class(1) trojan
Absolute magnitude 11.13
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2459800.5
Semi major axis 5.155837 ± 0.000000 au
Eccentricity 0.033620657 ± 0.000000015
Inclination 17.551632114 ± 0.000000313 °
Longitude of ascending node 100.400917 ± 0.000001 °
Argument of perihelia 226.881921 ± 0.000026 °
Mean anomaly 297.729876 ± 0.000031 °
Orbital period 11.71 yr

Ephemeris & Observations

Ephemeris version NIMAv4
Observation file (documentation) omc_ast_NIMAv4.txt
bsp file 32615_2001QU277_nima_v4.bsp
Date of first observation 1977-10-06
Date of last observation 2022-07-16
Number of observations used in the fit 2072
Number of rejected observations 4
Number of DES observations 7
Number of MPC observations 1750
Number of unpublished observations 1
RMS of observations 0.109 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2022-01 0.013 0.005
2022-07 0.020 0.008
2023-01 0.018 0.005
2023-07 0.032 0.004
2024-01 0.024 0.002
2024-07 0.037 0.008
2025-01 0.029 0.006
2025-07 0.035 0.015
2026-01 0.033 0.013

Ephemeris comparison

residual plot

Difference between NIMAv4 and JPL39 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.