(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 | 11.56 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2457109.157145145 |
| Semi major axis | 5.241046 ± 0.000001 au |
| Eccentricity | 0.035861864 ± 0.000000140 |
| Inclination | 13.241346257 ± 0.000008996 ° |
| Longitude of ascending node | 76.199548 ± 0.000035 ° |
| Argument of perihelia | 324.578824 ± 0.000149 ° |
| Mean anomaly | 33.837418 ± 0.000152 ° |
| Orbital period | 12.00 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 56976_2000SS161_nima_v3.bsp |
| Date of first observation | 1990-11-22 |
| Date of last observation | 2020-09-05 |
| Number of observations used in the fit | 1222 |
| Number of rejected observations | 9 |
| Number of DES observations | 6 |
| Number of MPC observations | 1225 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.398 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.041 | 0.028 |
| 2021-07 | 0.063 | 0.042 |
| 2022-01 | 0.051 | 0.030 |
| 2022-07 | 0.082 | 0.045 |
| 2023-01 | 0.059 | 0.032 |
| 2023-07 | 0.083 | 0.049 |
| 2024-01 | 0.064 | 0.036 |
| 2024-07 | 0.072 | 0.048 |
| 2025-01 | 0.065 | 0.041 |
Ephemeris comparison
Difference between NIMAv3 and JPL35 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.