(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 | 39.265622 ± 0.000727 au |
| Eccentricity | 0.222070037 ± 0.000011697 |
| Inclination | 8.424124445 ± 0.000020087 ° |
| Longitude of ascending node | 97.012940 ± 0.000903 ° |
| Argument of perihelia | 294.516005 ± 0.000673 ° |
| Mean anomaly | 6.170982 ± 0.000589 ° |
| Orbital period | 246.05 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 47171_Lempo_nima_v6.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2018-10-12 |
| Number of observations used in the fit | 300 |
| Number of rejected observations | 8 |
| Number of DES observations | 11 |
| Number of MPC observations | 249 |
| Number of unpublished observations | 48 |
| RMS of observations | 0.322 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.052 | 0.044 |
| 2018-07 | 0.079 | 0.052 |
| 2019-01 | 0.065 | 0.051 |
| 2019-07 | 0.099 | 0.060 |
| 2020-01 | 0.082 | 0.059 |
| 2020-07 | 0.121 | 0.070 |
| 2021-01 | 0.104 | 0.069 |
| 2021-07 | 0.147 | 0.080 |
| 2022-01 | 0.129 | 0.079 |
Ephemeris comparison
Difference between NIMAv6 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.