(1867) Deiphobus
This object has a more recent orbit available here
Object
| Object | (1867) Deiphobus |
| Diameter(1) | 118 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.30 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.127048 ± 0.000001 au |
| Eccentricity | 0.044332865 ± 0.000000072 |
| Inclination | 26.914967381 ± 0.000007256 ° |
| Longitude of ascending node | 283.709866 ± 0.000015 ° |
| Argument of perihelia | 359.096756 ± 0.000176 ° |
| Mean anomaly | 281.072758 ± 0.000185 ° |
| Orbital period | 11.61 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 1867_Deiphobus_nima_v3.bsp |
| Date of first observation | 1971-03-03 |
| Date of last observation | 2020-09-30 |
| Number of observations used in the fit | 2245 |
| Number of rejected observations | 7 |
| Number of DES observations | 0 |
| Number of MPC observations | 2252 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.481 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.038 | 0.025 |
| 2021-07 | 0.057 | 0.040 |
| 2022-01 | 0.038 | 0.030 |
| 2022-07 | 0.057 | 0.049 |
| 2023-01 | 0.041 | 0.035 |
| 2023-07 | 0.056 | 0.044 |
| 2024-01 | 0.046 | 0.038 |
| 2024-07 | 0.056 | 0.032 |
| 2025-01 | 0.056 | 0.035 |
Ephemeris comparison
Difference between NIMAv3 and JPL69 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.