(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 | 39.823956 ± 0.002045 au |
| Eccentricity | 0.283394746 ± 0.000030795 |
| Inclination | 15.466837737 ± 0.000258250 ° |
| Longitude of ascending node | 169.270778 ± 0.000743 ° |
| Argument of perihelia | 68.018510 ± 0.000929 ° |
| Mean anomaly | 4.394099 ± 0.000588 ° |
| Orbital period | 251.32 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 38628_Huya_nima_v4.bsp |
| Date of first observation | 1996-04-09 |
| Date of last observation | 2018-05-12 |
| Number of observations used in the fit | 310 |
| Number of rejected observations | 2 |
| Number of DES observations | 0 |
| Number of MPC observations | 291 |
| Number of unpublished observations | 21 |
| RMS of observations | 0.401 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.136 | 0.061 |
| 2018-07 | 0.125 | 0.052 |
| 2019-01 | 0.178 | 0.068 |
| 2019-07 | 0.165 | 0.058 |
| 2020-01 | 0.227 | 0.075 |
| 2020-07 | 0.216 | 0.065 |
| 2021-01 | 0.283 | 0.083 |
| 2021-07 | 0.276 | 0.072 |
| 2022-01 | 0.347 | 0.090 |
Ephemeris comparison
Difference between NIMAv4 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.