(15094) Polymele


This object has a more recent orbit available here

Object

Object (15094) Polymele
Diameter(1) 21 km
Dynamic class(1) trojan
Absolute magnitude 11.76
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2457274.253817529
Semi major axis 5.161315 ± 0.000001 au
Eccentricity 0.094949496 ± 0.000000150
Inclination 12.998738776 ± 0.000010072 °
Longitude of ascending node 50.339836 ± 0.000039 °
Argument of perihelia 5.076120 ± 0.000067 °
Mean anomaly 175.152668 ± 0.000072 °
Orbital period 11.73 yr

Ephemeris & Observations

Ephemeris version NIMAv3
Observation file (documentation) omc_ast_NIMAv3.txt
bsp file 15094_Polymele_nima_v3.bsp
Date of first observation 1951-11-30
Date of last observation 2020-11-16
Number of observations used in the fit 1010
Number of rejected observations 3
Number of DES observations 0
Number of MPC observations 1013
Number of unpublished observations 0
RMS of observations 0.412 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 0.036 0.033
2021-07 0.042 0.032
2022-01 0.063 0.050
2022-07 0.058 0.034
2023-01 0.098 0.051
2023-07 0.068 0.035
2024-01 0.093 0.056
2024-07 0.069 0.040
2025-01 0.074 0.054

Ephemeris comparison

residual plot

Difference between NIMAv3 and JPL16 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.