(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 | 39.712126 ± 0.000553 au |
| Eccentricity | 0.230672120 ± 0.000008991 |
| Inclination | 8.415930888 ± 0.000013009 ° |
| Longitude of ascending node | 97.078880 ± 0.000171 ° |
| Argument of perihelia | 294.819084 ± 0.000591 ° |
| Mean anomaly | 10.540130 ± 0.000262 ° |
| Orbital period | 250.26 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv11 |
| Observation file |
omc_ast_NIMAv11.txt |
| bsp file | 47171_Lempo_nima_v11.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2022-02-23 |
| Number of observations used in the fit | 793 |
| Number of rejected observations | 7 |
| Number of DES observations | 11 |
| Number of MPC observations | 692 |
| Number of unpublished observations | 97 |
| RMS of observations | 0.256 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv11 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.037 | 0.032 |
| 2022-07 | 0.045 | 0.035 |
| 2023-01 | 0.042 | 0.036 |
| 2023-07 | 0.055 | 0.039 |
| 2024-01 | 0.049 | 0.040 |
| 2024-07 | 0.068 | 0.044 |
| 2025-01 | 0.060 | 0.045 |
| 2025-07 | 0.083 | 0.049 |
| 2026-01 | 0.073 | 0.050 |
Ephemeris comparison
Difference between NIMAv11 and JPL37 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.