(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 | 45.460061 ± 0.004085 au |
| Eccentricity | 0.098621553 ± 0.000057960 |
| Inclination | 12.057071254 ± 0.000491017 ° |
| Longitude of ascending node | 50.042777 ± 0.001240 ° |
| Argument of perihelia | 58.501973 ± 0.018092 ° |
| Mean anomaly | 340.738317 ± 0.018028 ° |
| Orbital period | 306.52 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 19521_Chaos_nima_v5.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2020-11-19 |
| Number of observations used in the fit | 205 |
| Number of rejected observations | 11 |
| Number of DES observations | 0 |
| Number of MPC observations | 112 |
| Number of unpublished observations | 104 |
| RMS of observations | 0.346 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.093 | 0.070 |
| 2020-07 | 0.075 | 0.072 |
| 2021-01 | 0.102 | 0.074 |
| 2021-07 | 0.093 | 0.076 |
| 2022-01 | 0.118 | 0.079 |
| 2022-07 | 0.116 | 0.080 |
| 2023-01 | 0.139 | 0.084 |
| 2023-07 | 0.144 | 0.085 |
| 2024-01 | 0.166 | 0.090 |
Ephemeris comparison
Difference between NIMAv5 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.