(83982) Crantor
This object has a more recent orbit available here
Object
| Object | (83982) Crantor |
| Diameter(1) | 59 km |
| Dynamic class(1) | Centaur |
| Absolute magnitude | 8.80 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 19.502601 ± 0.000121 au |
| Eccentricity | 0.277353869 ± 0.000002756 |
| Inclination | 12.755246498 ± 0.000045782 ° |
| Longitude of ascending node | 117.381951 ± 0.000089 ° |
| Argument of perihelia | 93.762251 ± 0.000802 ° |
| Mean anomaly | 70.311397 ± 0.001041 ° |
| Orbital period | 86.13 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 83982_Crantor_nima_v4.bsp |
| Date of first observation | 2001-03-19 |
| Date of last observation | 2020-08-15 |
| Number of observations used in the fit | 311 |
| Number of rejected observations | 3 |
| Number of DES observations | 0 |
| Number of MPC observations | 296 |
| Number of unpublished observations | 18 |
| RMS of observations | 0.225 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.062 | 0.040 |
| 2020-07 | 0.092 | 0.046 |
| 2021-01 | 0.079 | 0.043 |
| 2021-07 | 0.119 | 0.051 |
| 2022-01 | 0.102 | 0.047 |
| 2022-07 | 0.150 | 0.057 |
| 2023-01 | 0.129 | 0.051 |
| 2023-07 | 0.185 | 0.064 |
| 2024-01 | 0.160 | 0.057 |
Ephemeris comparison
Difference between NIMAv4 and JPL20 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.