(54598) Bienor


This object has a more recent orbit available here

Object

Object (54598) Bienor
Diameter(1) 198 km
Dynamic class(1) Centaur
Absolute magnitude 7.54
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2459800.5
Semi major axis 16.511359 ± 0.000004 au
Eccentricity 0.200887287 ± 0.000000275
Inclination 20.745243220 ± 0.000001829 °
Longitude of ascending node 337.704538 ± 0.000027 °
Argument of perihelia 152.495604 ± 0.000074 °
Mean anomaly 331.074863 ± 0.000046 °
Orbital period 67.09 yr

Ephemeris & Observations

Ephemeris version NIMAv17
Observation file (documentation) omc_ast_NIMAv17.txt
bsp file 54598_Bienor_nima_v17.bsp
Date of first observation 1953-01-12
Date of last observation 2022-02-27
Number of observations used in the fit 1204
Number of rejected observations 5
Number of DES observations 0
Number of MPC observations 889
Number of unpublished observations 320
RMS of observations 0.306 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv17 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2022-01 0.031 0.016
2022-07 0.035 0.016
2023-01 0.045 0.021
2023-07 0.046 0.022
2024-01 0.060 0.028
2024-07 0.059 0.030
2025-01 0.076 0.039
2025-07 0.071 0.041
2026-01 0.091 0.054

Ephemeris comparison

residual plot

Difference between NIMAv17 and JPL63 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.