(20000) Varuna
Object
| Object |
(20000) Varuna |
| Diameter(1) |
678 km |
| Dynamic class(1) |
cubewano-hot |
| Absolute magnitude |
3.80 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
43.082611 ± 0.000490 au |
| Eccentricity |
0.054702373 ± 0.000002683 |
| Inclination |
17.143417469 ± 0.000039134 ° |
| Longitude of ascending node |
97.221759 ± 0.000045 ° |
| Argument of perihelia |
271.611201 ± 0.009384 ° |
| Mean anomaly |
115.097090 ± 0.009987 ° |
| Orbital period |
282.79 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv16 |
| Observation file (documentation) |
omc_ast_NIMAv16.txt |
| bsp file |
20000_Varuna_nima_v16.bsp |
| Date of first observation |
1954-11-24 |
| Date of last observation |
2024-03-06 |
| Number of observations used in the fit |
1276 |
| Number of rejected observations |
8 |
| Number of DES observations |
0 |
| Number of MPC observations |
808 |
| Number of unpublished observations |
476 |
| RMS of observations |
0.234 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv16 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.065 |
0.034 |
| 2024-07 |
0.054 |
0.034 |
| 2025-01 |
0.075 |
0.037 |
| 2025-07 |
0.064 |
0.037 |
| 2026-01 |
0.086 |
0.040 |
| 2026-07 |
0.074 |
0.040 |
| 2027-01 |
0.098 |
0.043 |
| 2027-07 |
0.085 |
0.043 |
| 2028-01 |
0.111 |
0.047 |
Ephemeris comparison
Difference between NIMAv16 and JPL60 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