(4709) Ennomos
This object has a more recent orbit available here
Object
| Object | (4709) Ennomos |
| Diameter(1) | 90 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.75 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2457522.919469434 |
| Semi major axis | 5.239933 ± 0.000000 au |
| Eccentricity | 0.021839065 ± 0.000000043 |
| Inclination | 25.453147768 ± 0.000001599 ° |
| Longitude of ascending node | 253.154441 ± 0.000005 ° |
| Argument of perihelia | 88.930964 ± 0.000052 ° |
| Mean anomaly | 146.081161 ± 0.000053 ° |
| Orbital period | 11.99 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 4709_Ennomos_nima_v5.bsp |
| Date of first observation | 1951-08-05 |
| Date of last observation | 2022-08-03 |
| Number of observations used in the fit | 3478 |
| Number of rejected observations | 29 |
| Number of DES observations | 34 |
| Number of MPC observations | 3454 |
| Number of unpublished observations | 19 |
| RMS of observations | 0.456 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) |
| 2022-01 | 0.006 | 0.006 |
| 2022-07 | 0.009 | 0.008 |
| 2023-01 | 0.007 | 0.006 |
| 2023-07 | 0.015 | 0.008 |
| 2024-01 | 0.015 | 0.007 |
| 2024-07 | 0.024 | 0.006 |
| 2025-01 | 0.027 | 0.008 |
| 2025-07 | 0.029 | 0.007 |
| 2026-01 | 0.038 | 0.010 |
Ephemeris comparison
Difference between NIMAv5 and JPL77 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.