(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 | 8.44 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
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 |
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| Number of unpublished observations | 4 |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.