(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 0.200887308 ± 0.000000138
Inclination 20.745243966 ± 0.000000760 °
Longitude of ascending node 337.704550 ± 0.000008 °
Argument of perihelia 152.495597 ± 0.000065 °
Mean anomaly 331.074863 ± 0.000046 °
Orbital period 67.09 yr

Ephemeris & Observations

Ephemeris version NIMAv18
Observation file (documentation) omc_ast_NIMAv18.txt
bsp file 54598_Bienor_nima_v18.bsp
Date of first observation 1953-01-12
Date of last observation 2022-12-26
Number of observations used in the fit 1221
Number of rejected observations 6
Number of DES observations 0
Number of MPC observations 905
Number of unpublished observations 322
RMS of observations 0.309 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv18 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2022-01 0.004 0.004
2022-07 0.004 0.004
2023-01 0.005 0.005
2023-07 0.005 0.005
2024-01 0.008 0.006
2024-07 0.009 0.007
2025-01 0.013 0.008
2025-07 0.013 0.009
2026-01 0.019 0.012

Ephemeris comparison

residual plot

Difference between NIMAv18 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.