(1867) Deiphobus
Object
| Object |
(1867) Deiphobus |
| Diameter(1) |
118 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.44 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
5.134739 ± 0.000000 au |
| Eccentricity |
0.045411261 ± 0.000000010 |
| Inclination |
26.897138813 ± 0.000000294 ° |
| Longitude of ascending node |
283.691346 ± 0.000000 ° |
| Argument of perihelia |
1.211855 ± 0.000024 ° |
| Mean anomaly |
88.872366 ± 0.000025 ° |
| Orbital period |
11.64 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
1867_Deiphobus_nima_v7.bsp |
| Date of first observation |
1971-03-03 |
| Date of last observation |
2024-07-13 |
| Number of observations used in the fit |
4503 |
| Number of rejected observations |
18 |
| Number of DES observations |
0 |
| Number of MPC observations |
4162 |
| Number of unpublished observations |
4 |
| RMS of observations |
0.100 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) |
| 2024-01 |
0.014 |
0.010 |
| 2024-07 |
0.017 |
0.007 |
| 2025-01 |
0.017 |
0.008 |
| 2025-07 |
0.017 |
0.001 |
| 2026-01 |
0.021 |
0.002 |
| 2026-07 |
0.015 |
0.005 |
| 2027-01 |
0.021 |
0.008 |
| 2027-07 |
0.014 |
0.008 |
| 2028-01 |
0.019 |
0.014 |
Ephemeris comparison
Difference between NIMAv7 and JPL99 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