(47171) Lempo
This object has a more recent orbit available here
Object
| Object | (47171) Lempo |
| Diameter(1) | 272 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) | 2460600.5 |
| Semi major axis | 39.802571 ± 0.000545 au |
| Eccentricity | 0.231701351 ± 0.000008828 |
| Inclination | 8.404560598 ± 0.000012669 ° |
| Longitude of ascending node | 97.158662 ± 0.000162 ° |
| Argument of perihelia | 295.625162 ± 0.000577 ° |
| Mean anomaly | 13.108651 ± 0.000254 ° |
| Orbital period | 251.12 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv13 |
| Observation file |
omc_ast_NIMAv13.txt |
| bsp file | 47171_Lempo_nima_v13.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2024-02-28 |
| Number of observations used in the fit | 938 |
| Number of rejected observations | 7 |
| Number of DES observations | 11 |
| Number of MPC observations | 837 |
| Number of unpublished observations | 97 |
| RMS of observations | 0.257 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv13 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.044 | 0.037 |
| 2024-07 | 0.061 | 0.040 |
| 2025-01 | 0.054 | 0.042 |
| 2025-07 | 0.074 | 0.045 |
| 2026-01 | 0.066 | 0.046 |
| 2026-07 | 0.090 | 0.051 |
| 2027-01 | 0.081 | 0.052 |
| 2027-07 | 0.107 | 0.056 |
| 2028-01 | 0.099 | 0.058 |
Ephemeris comparison
Difference between NIMAv13 and JPL45 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.