(225088) Gonggong
This object has a more recent orbit available here
Object
| Object | (225088) Gonggong |
| Diameter(1) | 1535 km |
| Dynamic class(1) | res 3:10 |
| Absolute magnitude | 1.92 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2457166.2723815 |
| Semi major axis | 66.876500 ± 0.003692 au |
| Eccentricity | 0.506460716 ± 0.000034929 |
| Inclination | 30.946913673 ± 0.000272002 ° |
| Longitude of ascending node | 336.813477 ± 0.000051 ° |
| Argument of perihelia | 206.717208 ± 0.006267 ° |
| Mean anomaly | 103.942872 ± 0.015799 ° |
| Orbital period | 546.91 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 225088_Gonggong_nima_v5.bsp |
| Date of first observation | 1985-08-19 |
| Date of last observation | 2021-10-24 |
| Number of observations used in the fit | 430 |
| Number of rejected observations | 1 |
| Number of DES observations | 0 |
| Number of MPC observations | 413 |
| Number of unpublished observations | 18 |
| RMS of observations | 0.163 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.047 | 0.045 |
| 2021-07 | 0.057 | 0.052 |
| 2022-01 | 0.052 | 0.052 |
| 2022-07 | 0.064 | 0.060 |
| 2023-01 | 0.058 | 0.060 |
| 2023-07 | 0.072 | 0.070 |
| 2024-01 | 0.065 | 0.069 |
| 2024-07 | 0.082 | 0.081 |
| 2025-01 | 0.073 | 0.080 |
Ephemeris comparison
Difference between NIMAv5 and JPL12 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.