(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 | 45.460424 ± 0.006175 au |
| Eccentricity | 0.098623709 ± 0.000079510 |
| Inclination | 12.057033733 ± 0.001071918 ° |
| Longitude of ascending node | 50.042737 ± 0.001374 ° |
| Argument of perihelia | 58.497787 ± 0.035028 ° |
| Mean anomaly | 340.741902 ± 0.032898 ° |
| Orbital period | 306.52 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 19521_Chaos_nima_v3.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2018-12-07 |
| Number of observations used in the fit | 177 |
| Number of rejected observations | 1 |
| Number of DES observations | 0 |
| Number of MPC observations | 112 |
| Number of unpublished observations | 66 |
| RMS of observations | 0.396 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.105 | 0.097 |
| 2018-07 | 0.164 | 0.098 |
| 2019-01 | 0.135 | 0.105 |
| 2019-07 | 0.212 | 0.104 |
| 2020-01 | 0.183 | 0.114 |
| 2020-07 | 0.270 | 0.110 |
| 2021-01 | 0.246 | 0.124 |
| 2021-07 | 0.338 | 0.117 |
| 2022-01 | 0.320 | 0.135 |
Ephemeris comparison
Difference between NIMAv3 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.