(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 | 42.780482 ± 0.000645 au |
| Eccentricity | 0.054123108 ± 0.000002378 |
| Inclination | 17.219685579 ± 0.000121359 ° |
| Longitude of ascending node | 97.369323 ± 0.000155 ° |
| Argument of perihelia | 262.859135 ± 0.013382 ° |
| Mean anomaly | 117.241022 ± 0.013946 ° |
| Orbital period | 279.82 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv11 |
| Observation file |
omc_ast_NIMAv11.txt |
| bsp file | 20000_Varuna_nima_v11.bsp |
| Date of first observation | 1954-11-24 |
| Date of last observation | 2020-05-18 |
| Number of observations used in the fit | 1099 |
| Number of rejected observations | 8 |
| Number of DES observations | 0 |
| Number of MPC observations | 670 |
| Number of unpublished observations | 437 |
| RMS of observations | 0.233 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv11 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.051 | 0.025 |
| 2020-07 | 0.041 | 0.026 |
| 2021-01 | 0.062 | 0.028 |
| 2021-07 | 0.051 | 0.029 |
| 2022-01 | 0.074 | 0.032 |
| 2022-07 | 0.061 | 0.033 |
| 2023-01 | 0.087 | 0.036 |
| 2023-07 | 0.073 | 0.036 |
| 2024-01 | 0.101 | 0.039 |
Ephemeris comparison
Difference between NIMAv11 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.