(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 | 39.825854 ± 0.000669 au |
| Eccentricity | 0.283423486 ± 0.000010371 |
| Inclination | 15.466826844 ± 0.000066295 ° |
| Longitude of ascending node | 169.270703 ± 0.000166 ° |
| Argument of perihelia | 68.017510 ± 0.000194 ° |
| Mean anomaly | 4.394360 ± 0.000141 ° |
| Orbital period | 251.34 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 38628_Huya_nima_v8.bsp |
| Date of first observation | 1996-04-09 |
| Date of last observation | 2021-03-28 |
| Number of observations used in the fit | 832 |
| Number of rejected observations | 17 |
| Number of DES observations | 0 |
| Number of MPC observations | 659 |
| Number of unpublished observations | 190 |
| RMS of observations | 0.304 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.011 | 0.008 |
| 2021-07 | 0.027 | 0.010 |
| 2022-01 | 0.012 | 0.009 |
| 2022-07 | 0.025 | 0.012 |
| 2023-01 | 0.016 | 0.012 |
| 2023-07 | 0.023 | 0.014 |
| 2024-01 | 0.022 | 0.014 |
| 2024-07 | 0.024 | 0.016 |
| 2025-01 | 0.031 | 0.016 |
Ephemeris comparison
Difference between NIMAv8 and JPL35 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.