(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 | 5.80 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 13.669119 ± 0.000002 au |
| Eccentricity | 0.380449001 ± 0.000000096 |
| Inclination | 6.946653032 ± 0.000005195 ° |
| Longitude of ascending node | 209.214406 ± 0.000061 ° |
| Argument of perihelia | 339.816118 ± 0.000069 ° |
| Mean anomaly | 165.053221 ± 0.000033 ° |
| Orbital period | 50.54 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv9 |
| Observation file |
omc_ast_NIMAv9.txt |
| bsp file | 2060_Chiron_nima_v9.bsp |
| Date of first observation | 1895-04-24 |
| Date of last observation | 2018-10-13 |
| Number of observations used in the fit | 2306 |
| Number of rejected observations | 64 |
| Number of DES observations | 7 |
| Number of MPC observations | 2057 |
| Number of unpublished observations | 306 |
| RMS of observations | 0.528 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv9 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.015 | 0.014 |
| 2018-07 | 0.019 | 0.015 |
| 2019-01 | 0.017 | 0.016 |
| 2019-07 | 0.021 | 0.017 |
| 2020-01 | 0.020 | 0.017 |
| 2020-07 | 0.023 | 0.019 |
| 2021-01 | 0.022 | 0.019 |
| 2021-07 | 0.026 | 0.020 |
| 2022-01 | 0.025 | 0.020 |
Ephemeris comparison
Difference between NIMAv9 and JPL122 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.