(5638) Deikoon
Object
| Object |
(5638) Deikoon |
| Diameter(1) |
47 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
10.62 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
5.232546 ± 0.000000 au |
| Eccentricity |
0.105815461 ± 0.000000016 |
| Inclination |
10.919109066 ± 0.000000401 ° |
| Longitude of ascending node |
156.029493 ± 0.000005 ° |
| Argument of perihelia |
92.688189 ± 0.000008 ° |
| Mean anomaly |
96.862458 ± 0.000005 ° |
| Orbital period |
11.97 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv8 |
| Observation file (documentation) |
omc_ast_NIMAv8.txt |
| bsp file |
5638_Deikoon_nima_v8.bsp |
| Date of first observation |
1988-08-18 |
| Date of last observation |
2024-07-12 |
| Number of observations used in the fit |
3969 |
| Number of rejected observations |
70 |
| Number of DES observations |
10 |
| Number of MPC observations |
3675 |
| Number of unpublished observations |
76 |
| RMS of observations |
0.117 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.016 |
0.004 |
| 2024-07 |
0.020 |
0.006 |
| 2025-01 |
0.019 |
0.005 |
| 2025-07 |
0.019 |
0.006 |
| 2026-01 |
0.021 |
0.006 |
| 2026-07 |
0.019 |
0.004 |
| 2027-01 |
0.023 |
0.005 |
| 2027-07 |
0.018 |
0.003 |
| 2028-01 |
0.025 |
0.004 |
Ephemeris comparison
Difference between NIMAv8 and JPL53 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