(20000) Varuna
Object
| Object |
(20000) Varuna |
| Diameter(1) |
668 km |
| Dynamic class(1) |
cubewano-hot |
| Absolute magnitude |
3.81 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
43.137669 ± 0.000475 au |
| Eccentricity |
0.053563824 ± 0.000002635 |
| Inclination |
17.139513019 ± 0.000038344 ° |
| Longitude of ascending node |
97.213345 ± 0.000044 ° |
| Argument of perihelia |
272.583004 ± 0.009256 ° |
| Mean anomaly |
114.896196 ± 0.009835 ° |
| Orbital period |
283.33 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv17 |
| Observation file (documentation) |
omc_ast_NIMAv17.txt |
| bsp file |
20000_Varuna_nima_v17.bsp |
| Date of first observation |
1954-11-24 |
| Date of last observation |
2025-03-06 |
| Number of observations used in the fit |
1334 |
| Number of rejected observations |
8 |
| Number of DES observations |
0 |
| Number of MPC observations |
866 |
| Number of unpublished observations |
476 |
| RMS of observations |
0.233 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv17 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.060 |
0.033 |
| 2024-07 |
0.051 |
0.033 |
| 2025-01 |
0.069 |
0.036 |
| 2025-07 |
0.059 |
0.036 |
| 2026-01 |
0.080 |
0.039 |
| 2026-07 |
0.069 |
0.039 |
| 2027-01 |
0.091 |
0.043 |
| 2027-07 |
0.079 |
0.042 |
| 2028-01 |
0.103 |
0.046 |
Ephemeris comparison
Difference between NIMAv17 and JPL63 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.
Previous NIMA versions