(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 | 45.462656 ± 0.005590 au |
| Eccentricity | 0.098648098 ± 0.000073579 |
| Inclination | 12.057034302 ± 0.000912179 ° |
| Longitude of ascending node | 50.042734 ± 0.001343 ° |
| Argument of perihelia | 58.482184 ± 0.030301 ° |
| Mean anomaly | 340.755787 ± 0.028730 ° |
| Orbital period | 306.54 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 19521_Chaos_nima_v4.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2019-11-30 |
| Number of observations used in the fit | 185 |
| Number of rejected observations | 1 |
| Number of DES observations | 0 |
| Number of MPC observations | 112 |
| Number of unpublished observations | 74 |
| RMS of observations | 0.393 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.116 | 0.098 |
| 2019-07 | 0.165 | 0.099 |
| 2020-01 | 0.151 | 0.106 |
| 2020-07 | 0.211 | 0.105 |
| 2021-01 | 0.199 | 0.115 |
| 2021-07 | 0.265 | 0.111 |
| 2022-01 | 0.257 | 0.124 |
| 2022-07 | 0.328 | 0.118 |
| 2023-01 | 0.326 | 0.133 |
Ephemeris comparison
Difference between NIMAv4 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.