(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 | 39.265814 ± 0.001044 au |
| Eccentricity | 0.222072917 ± 0.000016226 |
| Inclination | 8.424125237 ± 0.000024011 ° |
| Longitude of ascending node | 97.012922 ± 0.001392 ° |
| Argument of perihelia | 294.515584 ± 0.000965 ° |
| Mean anomaly | 6.171207 ± 0.001067 ° |
| Orbital period | 246.05 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 47171_Lempo_nima_v5.bsp |
| Date of first observation | 1974-06-18 |
| Date of last observation | 2017-12-06 |
| Number of observations used in the fit | 287 |
| Number of rejected observations | 8 |
| Number of DES observations | 11 |
| Number of MPC observations | 246 |
| Number of unpublished observations | 38 |
| RMS of observations | 0.327 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.085 | 0.057 |
| 2018-07 | 0.161 | 0.082 |
| 2019-01 | 0.119 | 0.071 |
| 2019-07 | 0.202 | 0.098 |
| 2020-01 | 0.160 | 0.087 |
| 2020-07 | 0.248 | 0.115 |
| 2021-01 | 0.206 | 0.106 |
| 2021-07 | 0.299 | 0.134 |
| 2022-01 | 0.259 | 0.125 |
Ephemeris comparison
Difference between NIMAv5 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.