(47171) Lempo
This object has a more recent orbit available here
Object
| Object | (47171) Lempo |
| Diameter(1) | 286 km |
| Dynamic class(1) | plutino |
| Absolute magnitude | 4.70 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 39.265535 ± 0.000557 au |
| Eccentricity | 0.222068830 ± 0.000009191 |
| Inclination | 8.424128590 ± 0.000016483 ° |
| Longitude of ascending node | 97.012854 ± 0.000633 ° |
| Argument of perihelia | 294.516386 ± 0.000499 ° |
| Mean anomaly | 6.170820 ± 0.000328 ° |
| Orbital period | 246.05 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 47171_Lempo_nima_v8.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2020-08-29 |
| Number of observations used in the fit | 583 |
| Number of rejected observations | 6 |
| Number of DES observations | 11 |
| Number of MPC observations | 497 |
| Number of unpublished observations | 81 |
| RMS of observations | 0.271 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) |
| 2020-01 | 0.040 | 0.034 |
| 2020-07 | 0.046 | 0.037 |
| 2021-01 | 0.045 | 0.039 |
| 2021-07 | 0.056 | 0.042 |
| 2022-01 | 0.052 | 0.043 |
| 2022-07 | 0.068 | 0.047 |
| 2023-01 | 0.062 | 0.049 |
| 2023-07 | 0.082 | 0.053 |
| 2024-01 | 0.075 | 0.055 |
Ephemeris comparison
Difference between NIMAv8 and JPL22 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.