(2060) Chiron
This object has a more recent orbit available here
Object
| Object | (2060) Chiron |
| Diameter(1) | 210 km |
| Dynamic class(1) | Centaur |
| Absolute magnitude | 5.75 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2456897.139534811 |
| Semi major axis | 13.639713 ± 0.000001 au |
| Eccentricity | 0.381858292 ± 0.000000034 |
| Inclination | 6.936553400 ± 0.000003009 ° |
| Longitude of ascending node | 209.292043 ± 0.000021 ° |
| Argument of perihelia | 339.329128 ± 0.000023 ° |
| Mean anomaly | 132.535774 ± 0.000022 ° |
| Orbital period | 50.38 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv14 |
| Observation file |
omc_ast_NIMAv14.txt |
| bsp file | 2060_Chiron_nima_v14.bsp |
| Date of first observation | 1895-04-24 |
| Date of last observation | 2022-06-28 |
| Number of observations used in the fit | 4179 |
| Number of rejected observations | 32 |
| Number of DES observations | 7 |
| Number of MPC observations | 3622 |
| Number of unpublished observations | 413 |
| RMS of observations | 0.090 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv14 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.007 | 0.005 |
| 2022-07 | 0.009 | 0.006 |
| 2023-01 | 0.008 | 0.006 |
| 2023-07 | 0.011 | 0.007 |
| 2024-01 | 0.010 | 0.007 |
| 2024-07 | 0.013 | 0.007 |
| 2025-01 | 0.012 | 0.008 |
| 2025-07 | 0.015 | 0.008 |
| 2026-01 | 0.014 | 0.008 |
Ephemeris comparison
Difference between NIMAv14 and JPL145 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.