(20000) Varuna
This object has a more recent orbit available here
Object
| Object | (20000) Varuna |
| Diameter(1) | 678 km |
| Dynamic class(1) | cubewano-hot |
| Absolute magnitude | 3.80 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
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 |
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| Number of unpublished observations | 476 |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.