(5638) Deikoon
Object
| Object |
(5638) Deikoon |
| Diameter(1) |
47 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
10.57 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2456972.606408625 |
| Semi major axis |
5.258362 ± 0.000000 au |
| Eccentricity |
0.105405158 ± 0.000000016 |
| Inclination |
10.905329435 ± 0.000000400 ° |
| Longitude of ascending node |
156.030922 ± 0.000005 ° |
| Argument of perihelia |
91.664462 ± 0.000009 ° |
| Mean anomaly |
159.893223 ± 0.000009 ° |
| Orbital period |
12.06 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
5638_Deikoon_nima_v7.bsp |
| Date of first observation |
1988-08-18 |
| Date of last observation |
2023-08-12 |
| Number of observations used in the fit |
3603 |
| Number of rejected observations |
70 |
| Number of DES observations |
10 |
| Number of MPC observations |
3309 |
| Number of unpublished observations |
76 |
| RMS of observations |
0.117 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.014 |
0.002 |
| 2023-07 |
0.022 |
0.005 |
| 2024-01 |
0.017 |
0.004 |
| 2024-07 |
0.021 |
0.006 |
| 2025-01 |
0.019 |
0.005 |
| 2025-07 |
0.020 |
0.006 |
| 2026-01 |
0.021 |
0.006 |
| 2026-07 |
0.019 |
0.004 |
| 2027-01 |
0.024 |
0.005 |
Ephemeris comparison
Difference between NIMAv7 and JPL46 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