(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) | 2458200.5 |
| Semi major axis | 5.127324 ± 0.000000 au |
| Eccentricity | 0.043821785 ± 0.000000071 |
| Inclination | 26.914638225 ± 0.000005238 ° |
| Longitude of ascending node | 283.707479 ± 0.000010 ° |
| Argument of perihelia | 359.092140 ± 0.000110 ° |
| Mean anomaly | 247.062609 ± 0.000118 ° |
| Orbital period | 11.61 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 1867_Deiphobus_nima_v1.bsp |
| Date of first observation | 1971-03-03 |
| Date of last observation | 2019-01-28 |
| Number of observations used in the fit | 1805 |
| Number of rejected observations | 8 |
| Number of DES observations | 0 |
| Number of MPC observations | 1813 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.502 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.020 | 0.018 |
| 2018-07 | 0.017 | 0.016 |
| 2019-01 | 0.025 | 0.019 |
| 2019-07 | 0.026 | 0.021 |
| 2020-01 | 0.031 | 0.018 |
| 2020-07 | 0.041 | 0.024 |
| 2021-01 | 0.033 | 0.020 |
| 2021-07 | 0.049 | 0.031 |
| 2022-01 | 0.032 | 0.024 |
Ephemeris comparison
Difference between NIMAv1 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.