(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 | 45.458801 ± 0.003028 au |
| Eccentricity | 0.098609342 ± 0.000042707 |
| Inclination | 12.057069109 ± 0.000350556 ° |
| Longitude of ascending node | 50.042730 ± 0.000894 ° |
| Argument of perihelia | 58.512768 ± 0.013332 ° |
| Mean anomaly | 340.728911 ± 0.013366 ° |
| Orbital period | 306.50 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 19521_Chaos_nima_v6.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2020-11-20 |
| Number of observations used in the fit | 257 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 164 |
| Number of unpublished observations | 106 |
| RMS of observations | 0.292 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.056 | 0.014 |
| 2021-07 | 0.022 | 0.022 |
| 2022-01 | 0.055 | 0.016 |
| 2022-07 | 0.030 | 0.023 |
| 2023-01 | 0.055 | 0.019 |
| 2023-07 | 0.042 | 0.025 |
| 2024-01 | 0.060 | 0.023 |
| 2024-07 | 0.058 | 0.027 |
| 2025-01 | 0.070 | 0.028 |
Ephemeris comparison
Difference between NIMAv6 and JPL15 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.