(225088) Gonggong
This object has a more recent orbit available here
Object
| Object | (225088) Gonggong |
| Diameter(1) | 1230 km |
| Dynamic class(1) | res3:10 |
| Absolute magnitude | 1.89 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 67.015258 ± 0.003584 au |
| Eccentricity | 0.500685784 ± 0.000033556 |
| Inclination | 30.775531312 ± 0.000252499 ° |
| Longitude of ascending node | 336.845868 ± 0.000047 ° |
| Argument of perihelia | 206.803532 ± 0.006156 ° |
| Mean anomaly | 110.618872 ± 0.015706 ° |
| Orbital period | 548.62 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 225088_Gonggong_nima_v8.bsp |
| Date of first observation | 1985-08-19 |
| Date of last observation | 2023-10-08 |
| Number of observations used in the fit | 469 |
| Number of rejected observations | 1 |
| Number of DES observations | 0 |
| Number of MPC observations | 452 |
| Number of unpublished observations | 18 |
| RMS of observations | 0.159 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.059 | 0.062 |
| 2024-07 | 0.074 | 0.072 |
| 2025-01 | 0.066 | 0.071 |
| 2025-07 | 0.083 | 0.083 |
| 2026-01 | 0.073 | 0.081 |
| 2026-07 | 0.093 | 0.095 |
| 2027-01 | 0.081 | 0.093 |
| 2027-07 | 0.104 | 0.108 |
| 2028-01 | 0.090 | 0.105 |
Ephemeris comparison
Difference between NIMAv8 and JPL16 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.