(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 | 39.265463 ± 0.000657 au |
| Eccentricity | 0.222067604 ± 0.000010738 |
| Inclination | 8.424126206 ± 0.000018849 ° |
| Longitude of ascending node | 97.012888 ± 0.000779 ° |
| Argument of perihelia | 294.516392 ± 0.000577 ° |
| Mean anomaly | 6.170811 ± 0.000442 ° |
| Orbital period | 246.05 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 47171_Lempo_nima_v7.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2019-11-03 |
| Number of observations used in the fit | 357 |
| Number of rejected observations | 6 |
| Number of DES observations | 11 |
| Number of MPC observations | 295 |
| Number of unpublished observations | 57 |
| RMS of observations | 0.328 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.048 | 0.041 |
| 2019-07 | 0.063 | 0.046 |
| 2020-01 | 0.057 | 0.047 |
| 2020-07 | 0.078 | 0.053 |
| 2021-01 | 0.069 | 0.054 |
| 2021-07 | 0.095 | 0.060 |
| 2022-01 | 0.084 | 0.061 |
| 2022-07 | 0.115 | 0.068 |
| 2023-01 | 0.102 | 0.069 |
Ephemeris comparison
Difference between NIMAv7 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.