(19521) Chaos
This object has a more recent orbit available here
Object
| Object | (19521) Chaos |
| Diameter(1) | 600 km |
| Dynamic class(1) | cubewano-hot |
| Absolute magnitude | 4.64 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 46.070684 ± 0.000181 au |
| Eccentricity | 0.109493028 ± 0.000003017 |
| Inclination | 12.012078543 ± 0.000019905 ° |
| Longitude of ascending node | 49.874533 ± 0.000081 ° |
| Argument of perihelia | 55.851423 ± 0.000978 ° |
| Mean anomaly | 349.732134 ± 0.000784 ° |
| Orbital period | 312.71 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv12 |
| Observation file |
omc_ast_NIMAv12.txt |
| bsp file | 19521_Chaos_nima_v12.bsp |
| Date of first observation | 1991-10-17 |
| Date of last observation | 2023-09-28 |
| Number of observations used in the fit | 265 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 169 |
| Number of unpublished observations | 109 |
| RMS of observations | 0.288 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv12 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.004 | 0.004 |
| 2024-07 | 0.006 | 0.005 |
| 2025-01 | 0.008 | 0.006 |
| 2025-07 | 0.009 | 0.007 |
| 2026-01 | 0.012 | 0.008 |
| 2026-07 | 0.013 | 0.009 |
| 2027-01 | 0.016 | 0.010 |
| 2027-07 | 0.017 | 0.011 |
| 2028-01 | 0.020 | 0.013 |
Ephemeris comparison
Difference between NIMAv12 and JPL17 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.