(19521) Chaos


This object has a more recent orbit available here

Object

Object (19521) Chaos
Diameter(1) 600 km
Dynamic class(1) cubewano
Absolute magnitude 4.80
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 45.465502 ± 0.009600 au
Eccentricity 0.098672789 ± 0.000116766
Inclination 12.057019404 ± 0.001868820 °
Longitude of ascending node 50.042677 ± 0.001620 °
Argument of perihelia 58.457585 ± 0.059370 °
Mean anomaly 340.777125 ± 0.054868 °
Orbital period 306.57 yr

Ephemeris & Observations

Ephemeris version NIMAv1
Observation file (documentation) omc_ast_NIMAv1.txt
bsp file 19521_Chaos_nima_v1.bsp
Date of first observation 1991-10-17
Date of last observation 2016-12-30
Number of observations used in the fit 113
Number of rejected observations 0
Number of DES observations 0
Number of MPC observations 110
Number of unpublished observations 3
RMS of observations 0.434 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2018-01 0.129 0.094
2018-07 0.302 0.094
2019-01 0.211 0.107
2019-07 0.397 0.099
2020-01 0.317 0.122
2020-07 0.507 0.105
2021-01 0.441 0.140
2021-07 0.632 0.113
2022-01 0.583 0.157

Ephemeris comparison

residual plot

Difference between NIMAv1 and JPL12 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.