(225088) Gonggong
Object
| Object |
(225088) Gonggong |
| Diameter(1) |
1535 km |
| Dynamic class(1) |
res3:10 |
| Absolute magnitude |
1.89 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
66.944980 ± 0.003563 au |
| Eccentricity |
0.501992868 ± 0.000033186 |
| Inclination |
30.824855075 ± 0.000251291 ° |
| Longitude of ascending node |
336.842587 ± 0.000047 ° |
| Argument of perihelia |
206.705924 ± 0.006101 ° |
| Mean anomaly |
111.031029 ± 0.015610 ° |
| Orbital period |
547.75 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv9 |
| Observation file (documentation) |
omc_ast_NIMAv9.txt |
| bsp file |
225088_Gonggong_nima_v9.bsp |
| Date of first observation |
1985-08-19 |
| Date of last observation |
2025-06-30 |
| Number of observations used in the fit |
489 |
| Number of rejected observations |
1 |
| Number of DES observations |
0 |
| Number of MPC observations |
472 |
| Number of unpublished observations |
18 |
| RMS of observations |
0.156 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) |
| 2024-01 |
0.058 |
0.061 |
| 2024-07 |
0.074 |
0.071 |
| 2025-01 |
0.065 |
0.070 |
| 2025-07 |
0.082 |
0.082 |
| 2026-01 |
0.072 |
0.080 |
| 2026-07 |
0.092 |
0.094 |
| 2027-01 |
0.080 |
0.091 |
| 2027-07 |
0.103 |
0.107 |
| 2028-01 |
0.089 |
0.104 |
Ephemeris comparison
Difference between NIMAv9 and JPL19 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