(38628) Huya
This object has a more recent orbit available here
Object
| Object | (38628) Huya |
| Diameter(1) | 406 km |
| Dynamic class(1) | plutino |
| Absolute magnitude | 4.80 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 39.825367 ± 0.001161 au |
| Eccentricity | 0.283416100 ± 0.000017767 |
| Inclination | 15.466832655 ± 0.000131187 ° |
| Longitude of ascending node | 169.270737 ± 0.000365 ° |
| Argument of perihelia | 68.017720 ± 0.000371 ° |
| Mean anomaly | 4.394311 ± 0.000234 ° |
| Orbital period | 251.33 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 38628_Huya_nima_v5.bsp |
| Date of first observation | 1996-04-09 |
| Date of last observation | 2019-03-11 |
| Number of observations used in the fit | 476 |
| Number of rejected observations | 8 |
| Number of DES observations | 0 |
| Number of MPC observations | 302 |
| Number of unpublished observations | 182 |
| RMS of observations | 0.329 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.035 | 0.033 |
| 2018-07 | 0.047 | 0.033 |
| 2019-01 | 0.045 | 0.036 |
| 2019-07 | 0.051 | 0.037 |
| 2020-01 | 0.059 | 0.040 |
| 2020-07 | 0.060 | 0.041 |
| 2021-01 | 0.075 | 0.045 |
| 2021-07 | 0.073 | 0.046 |
| 2022-01 | 0.096 | 0.049 |
Ephemeris comparison
Difference between NIMAv5 and JPL28 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.