(4709) Ennomos
Object
| Object |
(4709) Ennomos |
| Diameter(1) |
90 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.60 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2458200.5 |
| Semi major axis |
5.244340 ± 0.000000 au |
| Eccentricity |
0.020939950 ± 0.000000024 |
| Inclination |
25.451508454 ± 0.000001246 ° |
| Longitude of ascending node |
253.122926 ± 0.000002 ° |
| Argument of perihelia |
86.214735 ± 0.000059 ° |
| Mean anomaly |
204.598211 ± 0.000061 ° |
| Orbital period |
12.01 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv4 |
| Observation file (documentation) |
omc_ast_NIMAv4.txt |
| bsp file |
4709_Ennomos_nima_v4.bsp |
| Date of first observation |
1951-08-05 |
| Date of last observation |
2020-10-09 |
| Number of observations used in the fit |
3108 |
| Number of rejected observations |
25 |
| Number of DES observations |
34 |
| Number of MPC observations |
2986 |
| Number of unpublished observations |
4 |
| RMS of observations |
0.107 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) |
| 2021-01 |
0.008 |
0.004 |
| 2021-07 |
0.015 |
0.008 |
| 2022-01 |
0.013 |
0.007 |
| 2022-07 |
0.022 |
0.012 |
| 2023-01 |
0.018 |
0.009 |
| 2023-07 |
0.028 |
0.011 |
| 2024-01 |
0.025 |
0.010 |
| 2024-07 |
0.031 |
0.006 |
| 2025-01 |
0.033 |
0.007 |
Ephemeris comparison
Difference between NIMAv4 and JPL71 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.
Previous NIMA versions