(56976) 2000SS161
This object has a more recent orbit available here
Object
| Object | (56976) 2000SS161 |
| Diameter(1) | 30 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 11.57 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.240276 ± 0.000000 au |
| Eccentricity | 0.034879318 ± 0.000000101 |
| Inclination | 13.242517909 ± 0.000009199 ° |
| Longitude of ascending node | 76.196997 ± 0.000036 ° |
| Argument of perihelia | 321.994376 ± 0.000119 ° |
| Mean anomaly | 257.952454 ± 0.000118 ° |
| Orbital period | 12.00 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 56976_2000SS161_nima_v4.bsp |
| Date of first observation | 1990-11-22 |
| Date of last observation | 2022-07-09 |
| Number of observations used in the fit | 1287 |
| Number of rejected observations | 9 |
| Number of DES observations | 6 |
| Number of MPC observations | 1290 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.402 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) |
| 2022-01 | 0.047 | 0.029 |
| 2022-07 | 0.076 | 0.044 |
| 2023-01 | 0.055 | 0.032 |
| 2023-07 | 0.077 | 0.047 |
| 2024-01 | 0.060 | 0.035 |
| 2024-07 | 0.068 | 0.046 |
| 2025-01 | 0.062 | 0.039 |
| 2025-07 | 0.061 | 0.040 |
| 2026-01 | 0.068 | 0.045 |
Ephemeris comparison
Difference between NIMAv4 and JPL38 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.