(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 ± 0.000000 au |
| Eccentricity | 0.044332802 ± 0.000000009 |
| Inclination | 26.914973549 ± 0.000001551 ° |
| Longitude of ascending node | 283.709892 ± 0.000001 ° |
| Argument of perihelia | 359.096060 ± 0.000100 ° |
| Mean anomaly | 281.073493 ± 0.000104 ° |
| Orbital period | 11.61 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 1867_Deiphobus_nima_v2.bsp |
| Date of first observation | 1971-03-03 |
| Date of last observation | 2019-08-13 |
| Number of observations used in the fit | 2326 |
| Number of rejected observations | 1 |
| Number of DES observations | 0 |
| Number of MPC observations | 2025 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.083 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.017 | 0.007 |
| 2019-07 | 0.018 | 0.009 |
| 2020-01 | 0.024 | 0.001 |
| 2020-07 | 0.033 | 0.002 |
| 2021-01 | 0.027 | 0.010 |
| 2021-07 | 0.040 | 0.019 |
| 2022-01 | 0.026 | 0.017 |
| 2022-07 | 0.036 | 0.028 |
| 2023-01 | 0.025 | 0.020 |
Ephemeris comparison
Difference between NIMAv2 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.