(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 | 45.758182 ± 0.000458 au |
| Eccentricity | 0.103212675 ± 0.000006688 |
| Inclination | 12.018383029 ± 0.000025503 ° |
| Longitude of ascending node | 49.900010 ± 0.000100 ° |
| Argument of perihelia | 55.647766 ± 0.002049 ° |
| Mean anomaly | 347.188579 ± 0.001787 ° |
| Orbital period | 309.54 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv10 |
| Observation file |
omc_ast_NIMAv10.txt |
| bsp file | 19521_Chaos_nima_v10.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2022-12-24 |
| Number of observations used in the fit | 261 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 167 |
| Number of unpublished observations | 107 |
| RMS of observations | 0.292 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv10 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 | 0.003 |
| 2022-07 | 0.005 | 0.004 |
| 2023-01 | 0.005 | 0.004 |
| 2023-07 | 0.008 | 0.006 |
| 2024-01 | 0.009 | 0.006 |
| 2024-07 | 0.013 | 0.008 |
| 2025-01 | 0.014 | 0.009 |
| 2025-07 | 0.018 | 0.010 |
| 2026-01 | 0.021 | 0.012 |
Ephemeris comparison
Difference between NIMAv10 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.