(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 | 4.99 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 39.712152 ± 0.000545 au |
| Eccentricity | 0.230672501 ± 0.000008866 |
| Inclination | 8.415932097 ± 0.000012760 ° |
| Longitude of ascending node | 97.078857 ± 0.000163 ° |
| Argument of perihelia | 294.819019 ± 0.000566 ° |
| Mean anomaly | 10.540173 ± 0.000253 ° |
| Orbital period | 250.26 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv12 |
| Observation file |
omc_ast_NIMAv12.txt |
| bsp file | 47171_Lempo_nima_v12.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2023-02-27 |
| Number of observations used in the fit | 860 |
| Number of rejected observations | 7 |
| Number of DES observations | 11 |
| Number of MPC observations | 759 |
| Number of unpublished observations | 97 |
| RMS of observations | 0.257 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv12 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.039 | 0.034 |
| 2023-07 | 0.050 | 0.037 |
| 2024-01 | 0.045 | 0.038 |
| 2024-07 | 0.062 | 0.041 |
| 2025-01 | 0.055 | 0.042 |
| 2025-07 | 0.076 | 0.046 |
| 2026-01 | 0.067 | 0.047 |
| 2026-07 | 0.091 | 0.051 |
| 2027-01 | 0.082 | 0.053 |
Ephemeris comparison
Difference between NIMAv12 and JPL41 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.