(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 | 42.780413 ± 0.000607 au |
| Eccentricity | 0.054122943 ± 0.000002370 |
| Inclination | 17.219685144 ± 0.000112991 ° |
| Longitude of ascending node | 97.369323 ± 0.000150 ° |
| Argument of perihelia | 262.857740 ± 0.012568 ° |
| Mean anomaly | 117.242514 ± 0.013085 ° |
| Orbital period | 279.82 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv12 |
| Observation file |
omc_ast_NIMAv12.txt |
| bsp file | 20000_Varuna_nima_v12.bsp |
| Date of first observation | 1954-11-24 |
| Date of last observation | 2020-11-19 |
| Number of observations used in the fit | 1111 |
| Number of rejected observations | 8 |
| Number of DES observations | 0 |
| Number of MPC observations | 670 |
| Number of unpublished observations | 449 |
| RMS of observations | 0.232 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv12 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.047 | 0.024 |
| 2020-07 | 0.038 | 0.025 |
| 2021-01 | 0.057 | 0.028 |
| 2021-07 | 0.047 | 0.029 |
| 2022-01 | 0.067 | 0.031 |
| 2022-07 | 0.056 | 0.032 |
| 2023-01 | 0.079 | 0.035 |
| 2023-07 | 0.067 | 0.035 |
| 2024-01 | 0.092 | 0.039 |
Ephemeris comparison
Difference between NIMAv12 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.