(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) | 2460600.5 |
| Semi major axis | 5.236606 ± 0.000000 au |
| Eccentricity | 0.035279493 ± 0.000000088 |
| Inclination | 13.242186071 ± 0.000008614 ° |
| Longitude of ascending node | 76.183185 ± 0.000035 ° |
| Argument of perihelia | 323.335002 ± 0.000117 ° |
| Mean anomaly | 322.467480 ± 0.000117 ° |
| Orbital period | 11.98 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 56976_2000SS161_nima_v5.bsp |
| Date of first observation | 1990-11-22 |
| Date of last observation | 2024-07-09 |
| Number of observations used in the fit | 1469 |
| Number of rejected observations | 9 |
| Number of DES observations | 6 |
| Number of MPC observations | 1472 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.391 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) |
| 2024-01 | 0.048 | 0.031 |
| 2024-07 | 0.056 | 0.040 |
| 2025-01 | 0.053 | 0.035 |
| 2025-07 | 0.054 | 0.036 |
| 2026-01 | 0.062 | 0.042 |
| 2026-07 | 0.056 | 0.032 |
| 2027-01 | 0.077 | 0.046 |
| 2027-07 | 0.059 | 0.028 |
| 2028-01 | 0.089 | 0.041 |
Ephemeris comparison
Difference between NIMAv5 and JPL46 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.