(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 | 4.85 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 39.431499 ± 0.000653 au |
| Eccentricity | 0.275912590 ± 0.000010274 |
| Inclination | 15.475039900 ± 0.000003230 ° |
| Longitude of ascending node | 169.463013 ± 0.000059 ° |
| Argument of perihelia | 68.322448 ± 0.000264 ° |
| Mean anomaly | 10.590020 ± 0.000230 ° |
| Orbital period | 247.61 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv9 |
| Observation file |
omc_ast_NIMAv9.txt |
| bsp file | 38628_Huya_nima_v9.bsp |
| Date of first observation | 1996-04-09 |
| Date of last observation | 2022-06-06 |
| Number of observations used in the fit | 966 |
| Number of rejected observations | 3 |
| Number of DES observations | 0 |
| Number of MPC observations | 793 |
| Number of unpublished observations | 176 |
| RMS of observations | 0.309 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv9 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.012 | 0.009 |
| 2022-07 | 0.024 | 0.012 |
| 2023-01 | 0.015 | 0.011 |
| 2023-07 | 0.022 | 0.013 |
| 2024-01 | 0.022 | 0.014 |
| 2024-07 | 0.024 | 0.016 |
| 2025-01 | 0.031 | 0.016 |
| 2025-07 | 0.031 | 0.018 |
| 2026-01 | 0.042 | 0.018 |
Ephemeris comparison
Difference between NIMAv9 and JPL37 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.