(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 | 4.64 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 45.756117 ± 0.002003 au |
| Eccentricity | 0.103185525 ± 0.000026460 |
| Inclination | 12.018368281 ± 0.000028044 ° |
| Longitude of ascending node | 49.899960 ± 0.000108 ° |
| Argument of perihelia | 55.657925 ± 0.009851 ° |
| Mean anomaly | 347.179613 ± 0.008699 ° |
| Orbital period | 309.52 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv9 |
| Observation file |
omc_ast_NIMAv9.txt |
| bsp file | 19521_Chaos_nima_v9.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2022-12-24 |
| Number of observations used in the fit | 260 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 167 |
| Number of unpublished observations | 106 |
| RMS of observations | 0.291 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv9 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.023 | 0.005 |
| 2022-07 | 0.008 | 0.015 |
| 2023-01 | 0.010 | 0.005 |
| 2023-07 | 0.021 | 0.014 |
| 2024-01 | 0.012 | 0.007 |
| 2024-07 | 0.037 | 0.015 |
| 2025-01 | 0.030 | 0.010 |
| 2025-07 | 0.057 | 0.016 |
| 2026-01 | 0.053 | 0.013 |
Ephemeris comparison
Difference between NIMAv9 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.