(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 | 8.42 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460800.5 |
| Semi major axis | 5.134616 ± 0.000000 au |
| Eccentricity | 0.045092673 ± 0.000000009 |
| Inclination | 26.897592954 ± 0.000000294 ° |
| Longitude of ascending node | 283.688011 ± 0.000000 ° |
| Argument of perihelia | 1.135222 ± 0.000024 ° |
| Mean anomaly | 105.931559 ± 0.000025 ° |
| Orbital period | 11.64 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 1867_Deiphobus_nima_v8.bsp |
| Date of first observation | 1971-03-03 |
| Date of last observation | 2025-07-09 |
| Number of observations used in the fit | 5284 |
| Number of rejected observations | 18 |
| Number of DES observations | 0 |
| Number of MPC observations | 4943 |
| Number of unpublished observations | 4 |
| RMS of observations | 0.100 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 | 0.013 | 0.010 |
| 2024-07 | 0.015 | 0.006 |
| 2025-01 | 0.016 | 0.008 |
| 2025-07 | 0.015 | 0.001 |
| 2026-01 | 0.019 | 0.002 |
| 2026-07 | 0.014 | 0.005 |
| 2027-01 | 0.020 | 0.008 |
| 2027-07 | 0.013 | 0.008 |
| 2028-01 | 0.018 | 0.013 |
Ephemeris comparison
Difference between NIMAv8 and JPL104 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.