(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Number of unpublished observations | 182 |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
![residual plot](data/nima/Huya/omc_NIMAv5.png)
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
![residual plot](data/nima/Huya/diff_NIMAv5_JPL28.png)
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.