(19521) Chaos
Object
| Object |
(19521) Chaos |
| Diameter(1) |
600 km |
| Dynamic class(1) |
cubewano-hot |
| Absolute magnitude |
4.64 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions