(20000) Varuna
This object has a more recent orbit available here
Object
| Object | (20000) Varuna |
| Diameter(1) | 678 km |
| Dynamic class(1) | cubewano |
| Absolute magnitude | 3.60 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 42.780376 ± 0.001220 au |
| Eccentricity | 0.054124327 ± 0.000002714 |
| Inclination | 17.219667534 ± 0.000225909 ° |
| Longitude of ascending node | 97.369309 ± 0.000250 ° |
| Argument of perihelia | 262.857056 ± 0.025454 ° |
| Mean anomaly | 117.243102 ± 0.026606 ° |
| Orbital period | 279.82 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 20000_Varuna_nima_v8.bsp |
| Date of first observation | 1954-11-24 |
| Date of last observation | 2018-03-19 |
| Number of observations used in the fit | 627 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 402 |
| Number of unpublished observations | 231 |
| RMS of observations | 0.285 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.063 | 0.031 |
| 2018-07 | 0.046 | 0.032 |
| 2019-01 | 0.079 | 0.035 |
| 2019-07 | 0.061 | 0.035 |
| 2020-01 | 0.098 | 0.039 |
| 2020-07 | 0.078 | 0.039 |
| 2021-01 | 0.120 | 0.043 |
| 2021-07 | 0.098 | 0.044 |
| 2022-01 | 0.144 | 0.047 |
Ephemeris comparison
Difference between NIMAv8 and JPL43 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.