(4709) Ennomos
This object has a more recent orbit available here
Object
| Object | (4709) Ennomos |
| Diameter(1) | 113 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.60 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.244340 ± 0.000001 au |
| Eccentricity | 0.020939973 ± 0.000000158 |
| Inclination | 25.451508427 ± 0.000007024 ° |
| Longitude of ascending node | 253.122910 ± 0.000019 ° |
| Argument of perihelia | 86.214758 ± 0.000217 ° |
| Mean anomaly | 204.598195 ± 0.000226 ° |
| Orbital period | 12.01 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 4709_Ennomos_nima_v1.bsp |
| Date of first observation | 1951-08-05 |
| Date of last observation | 2018-07-10 |
| Number of observations used in the fit | 1709 |
| Number of rejected observations | 4 |
| Number of DES observations | 34 |
| Number of MPC observations | 1679 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.494 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.032 | 0.026 |
| 2018-07 | 0.032 | 0.026 |
| 2019-01 | 0.039 | 0.025 |
| 2019-07 | 0.048 | 0.031 |
| 2020-01 | 0.046 | 0.028 |
| 2020-07 | 0.066 | 0.039 |
| 2021-01 | 0.051 | 0.032 |
| 2021-07 | 0.077 | 0.051 |
| 2022-01 | 0.054 | 0.036 |
Ephemeris comparison
Difference between NIMAv1 and JPL58 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.