(1873) Agenor
This object has a more recent orbit available here
Object
Object | (1873) Agenor |
Diameter(1) | 53 km |
Dynamic class(1) | trojan |
Absolute magnitude | 10.25 |
G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
Epoch (Julian date) | 2460600.5 |
Semi major axis | 5.223879 ± 0.000000 au |
Eccentricity | 0.091128960 ± 0.000000024 |
Inclination | 21.892824342 ± 0.000000457 ° |
Longitude of ascending node | 197.894066 ± 0.000002 ° |
Argument of perihelia | 357.518230 ± 0.000011 ° |
Mean anomaly | 158.328068 ± 0.000009 ° |
Orbital period | 11.94 yr |
Ephemeris & Observations
Ephemeris version | NIMAv3 |
Observation file |
omc_ast_NIMAv3.txt |
bsp file | 1873_Agenor_nima_v3.bsp |
Date of first observation | 1971-03-25 |
Date of last observation | 2024-07-12 |
Number of observations used in the fit | 3635 |
Number of rejected observations | 11 |
Number of DES observations | 0 |
Number of MPC observations | 3333 |
Number of unpublished observations | 0 |
RMS of observations | 0.114 arcsec |
Residuals

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) |
2024-01 | 0.022 | 0.003 |
2024-07 | 0.025 | 0.003 |
2025-01 | 0.023 | 0.003 |
2025-07 | 0.024 | 0.003 |
2026-01 | 0.026 | 0.002 |
2026-07 | 0.024 | 0.002 |
2027-01 | 0.029 | 0.003 |
2027-07 | 0.025 | 0.003 |
2028-01 | 0.034 | 0.004 |
Ephemeris comparison

Difference between NIMAv3 and JPL60 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.