(69987) 1998WA25
This object has a more recent orbit available here
Object
| Object | (69987) 1998WA25 |
| Diameter(1) | 168 km |
| Dynamic class(1) | cubewano |
| Absolute magnitude | 7.08 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2457102.461295445 |
| Semi major axis | 42.604001 ± 0.007584 au |
| Eccentricity | 0.019975953 ± 0.000063430 |
| Inclination | 1.046462932 ± 0.000712887 ° |
| Longitude of ascending node | 136.374684 ± 0.072736 ° |
| Argument of perihelia | 222.221628 ± 0.413844 ° |
| Mean anomaly | 70.399624 ± 0.373314 ° |
| Orbital period | 278.09 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 69987_1998WA25_nima_v1.bsp |
| Date of first observation | 1998-11-19 |
| Date of last observation | 2018-01-05 |
| Number of observations used in the fit | 30 |
| Number of rejected observations | 2 |
| Number of DES observations | 0 |
| Number of MPC observations | 32 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.216 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.482 | 0.174 |
| 2021-07 | 0.564 | 0.173 |
| 2022-01 | 0.618 | 0.187 |
| 2022-07 | 0.707 | 0.185 |
| 2023-01 | 0.766 | 0.200 |
| 2023-07 | 0.862 | 0.197 |
| 2024-01 | 0.927 | 0.212 |
| 2024-07 | 1.028 | 0.209 |
| 2025-01 | 1.100 | 0.224 |
Ephemeris comparison
Difference between NIMAv1 and JPL7 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.