(2060) Chiron
Object
| Object |
(2060) Chiron |
| Diameter(1) |
210 km |
| Dynamic class(1) |
Centaur |
| Absolute magnitude |
5.66 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
13.705600 ± 0.000001 au |
| Eccentricity |
0.377436692 ± 0.000000027 |
| Inclination |
6.918872345 ± 0.000001530 ° |
| Longitude of ascending node |
209.305005 ± 0.000009 ° |
| Argument of perihelia |
339.256852 ± 0.000013 ° |
| Mean anomaly |
204.962873 ± 0.000021 ° |
| Orbital period |
50.74 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv17 |
| Observation file (documentation) |
omc_ast_NIMAv17.txt |
| bsp file |
2060_Chiron_nima_v17.bsp |
| Date of first observation |
1895-04-24 |
| Date of last observation |
2024-07-09 |
| Number of observations used in the fit |
5223 |
| Number of rejected observations |
32 |
| Number of DES observations |
7 |
| Number of MPC observations |
4451 |
| Number of unpublished observations |
433 |
| RMS of observations |
0.096 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv17 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.003 |
0.003 |
| 2024-07 |
0.004 |
0.003 |
| 2025-01 |
0.004 |
0.003 |
| 2025-07 |
0.005 |
0.003 |
| 2026-01 |
0.005 |
0.004 |
| 2026-07 |
0.007 |
0.004 |
| 2027-01 |
0.006 |
0.004 |
| 2027-07 |
0.008 |
0.004 |
| 2028-01 |
0.008 |
0.004 |
Ephemeris comparison
Difference between NIMAv17 and JPL157 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