(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 | 3.79 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 42.809021 ± 0.000500 au |
| Eccentricity | 0.057788503 ± 0.000002575 |
| Inclination | 17.186025421 ± 0.000040136 ° |
| Longitude of ascending node | 97.307485 ± 0.000046 ° |
| Argument of perihelia | 265.677053 ± 0.009218 ° |
| Mean anomaly | 118.173039 ± 0.009816 ° |
| Orbital period | 280.10 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv14 |
| Observation file |
omc_ast_NIMAv14.txt |
| bsp file | 20000_Varuna_nima_v14.bsp |
| Date of first observation | 1954-11-24 |
| Date of last observation | 2022-05-03 |
| Number of observations used in the fit | 1211 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 743 |
| Number of unpublished observations | 474 |
| RMS of observations | 0.233 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv14 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.050 | 0.028 |
| 2022-07 | 0.042 | 0.029 |
| 2023-01 | 0.059 | 0.031 |
| 2023-07 | 0.050 | 0.032 |
| 2024-01 | 0.069 | 0.035 |
| 2024-07 | 0.059 | 0.035 |
| 2025-01 | 0.080 | 0.038 |
| 2025-07 | 0.069 | 0.038 |
| 2026-01 | 0.092 | 0.041 |
Ephemeris comparison
Difference between NIMAv14 and JPL52 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.