(4709) Ennomos
Object
| Object |
(4709) Ennomos |
| Diameter(1) |
90 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.75 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2457522.919469434 |
| Semi major axis |
5.239933 ± 0.000000 au |
| Eccentricity |
0.021839106 ± 0.000000014 |
| Inclination |
25.453147156 ± 0.000000208 ° |
| Longitude of ascending node |
253.154442 ± 0.000001 ° |
| Argument of perihelia |
88.930989 ± 0.000018 ° |
| Mean anomaly |
146.081136 ± 0.000019 ° |
| Orbital period |
11.99 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv6 |
| Observation file (documentation) |
omc_ast_NIMAv6.txt |
| bsp file |
4709_Ennomos_nima_v6.bsp |
| Date of first observation |
1951-08-05 |
| Date of last observation |
2023-07-04 |
| Number of observations used in the fit |
4190 |
| Number of rejected observations |
46 |
| Number of DES observations |
34 |
| Number of MPC observations |
3930 |
| Number of unpublished observations |
19 |
| RMS of observations |
0.110 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.006 |
0.003 |
| 2023-07 |
0.010 |
0.004 |
| 2024-01 |
0.009 |
0.004 |
| 2024-07 |
0.013 |
0.002 |
| 2025-01 |
0.014 |
0.003 |
| 2025-07 |
0.015 |
0.002 |
| 2026-01 |
0.020 |
0.003 |
| 2026-07 |
0.015 |
0.006 |
| 2027-01 |
0.022 |
0.009 |
Ephemeris comparison
Difference between NIMAv6 and JPL83 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