(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 | 39.825628 ± 0.000899 au |
| Eccentricity | 0.283419971 ± 0.000013899 |
| Inclination | 15.466826296 ± 0.000094166 ° |
| Longitude of ascending node | 169.270697 ± 0.000255 ° |
| Argument of perihelia | 68.017529 ± 0.000267 ° |
| Mean anomaly | 4.394391 ± 0.000185 ° |
| Orbital period | 251.33 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 38628_Huya_nima_v7.bsp |
| Date of first observation | 1996-04-09 |
| Date of last observation | 2019-07-03 |
| Number of observations used in the fit | 496 |
| Number of rejected observations | 17 |
| Number of DES observations | 0 |
| Number of MPC observations | 324 |
| Number of unpublished observations | 189 |
| RMS of observations | 0.340 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.013 | 0.008 |
| 2019-07 | 0.040 | 0.012 |
| 2020-01 | 0.013 | 0.008 |
| 2020-07 | 0.037 | 0.013 |
| 2021-01 | 0.015 | 0.010 |
| 2021-07 | 0.034 | 0.015 |
| 2022-01 | 0.022 | 0.013 |
| 2022-07 | 0.033 | 0.017 |
| 2023-01 | 0.033 | 0.016 |
Ephemeris comparison
Difference between NIMAv7 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.