(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 | 45.458795 ± 0.003027 au |
| Eccentricity | 0.098609254 ± 0.000042703 |
| Inclination | 12.057065561 ± 0.000350023 ° |
| Longitude of ascending node | 50.042725 ± 0.000894 ° |
| Argument of perihelia | 58.512796 ± 0.013322 ° |
| Mean anomaly | 340.728887 ± 0.013358 ° |
| Orbital period | 306.50 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 19521_Chaos_nima_v7.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2020-11-20 |
| Number of observations used in the fit | 256 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 164 |
| Number of unpublished observations | 105 |
| RMS of observations | 0.293 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.055 | 0.010 |
| 2021-07 | 0.020 | 0.020 |
| 2022-01 | 0.054 | 0.012 |
| 2022-07 | 0.027 | 0.021 |
| 2023-01 | 0.054 | 0.016 |
| 2023-07 | 0.039 | 0.023 |
| 2024-01 | 0.058 | 0.020 |
| 2024-07 | 0.055 | 0.025 |
| 2025-01 | 0.068 | 0.025 |
Ephemeris comparison
Difference between NIMAv7 and JPL16 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.