(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Number of unpublished observations |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