(17365) Thymbraeus


Object

Object (17365) Thymbraeus
Diameter(1) 45 km
Dynamic class(1) trojan
Absolute magnitude 10.57
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2460600.5
Semi major axis 5.267533 ± 0.000000 au
Eccentricity 0.078339358 ± 0.000000017
Inclination 11.644109527 ± 0.000000375 °
Longitude of ascending node 252.111804 ± 0.000003 °
Argument of perihelia 118.080247 ± 0.000012 °
Mean anomaly 354.159080 ± 0.000018 °
Orbital period 12.09 yr

Ephemeris & Observations

Ephemeris version NIMAv2
Observation file (documentation) omc_ast_NIMAv2.txt
bsp file 17365_Thymbraeus_nima_v2.bsp
Date of first observation 1954-11-23
Date of last observation 2024-07-13
Number of observations used in the fit 3255
Number of rejected observations 194
Number of DES observations 0
Number of MPC observations 2965
Number of unpublished observations 0
RMS of observations 0.146 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2024-01 0.021 0.009
2024-07 0.031 0.011
2025-01 0.030 0.011
2025-07 0.034 0.006
2026-01 0.040 0.008
2026-07 0.033 0.002
2027-01 0.046 0.004
2027-07 0.031 0.007
2028-01 0.042 0.013

Ephemeris comparison

residual plot

Difference between NIMAv2 and JPL48 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