(69987) 1998WA25
Object
| Object |
(69987) 1998WA25 |
| Diameter(1) |
130 km |
| Dynamic class(1) |
cubewano-cold |
| Absolute magnitude |
7.09 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
42.813226 ± 0.008001 au |
| Eccentricity |
0.023826203 ± 0.000079306 |
| Inclination |
1.047940581 ± 0.000073063 ° |
| Longitude of ascending node |
136.274413 ± 0.009148 ° |
| Argument of perihelia |
231.601730 ± 0.299536 ° |
| Mean anomaly |
73.136176 ± 0.302536 ° |
| Orbital period |
280.14 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv3 |
| Observation file (documentation) |
omc_ast_NIMAv3.txt |
| bsp file |
69987_1998WA25_nima_v3.bsp |
| Date of first observation |
1998-11-19 |
| Date of last observation |
2022-11-28 |
| Number of observations used in the fit |
32 |
| Number of rejected observations |
2 |
| Number of DES observations |
0 |
| Number of MPC observations |
34 |
| Number of unpublished observations |
0 |
| RMS of observations |
0.213 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.741 |
0.205 |
| 2024-07 |
0.811 |
0.202 |
| 2025-01 |
0.878 |
0.217 |
| 2025-07 |
0.952 |
0.213 |
| 2026-01 |
1.025 |
0.229 |
| 2026-07 |
1.102 |
0.224 |
| 2027-01 |
1.182 |
0.240 |
| 2027-07 |
1.261 |
0.234 |
| 2028-01 |
1.350 |
0.251 |
Ephemeris comparison
Difference between NIMAv3 and JPL8 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.
Previous NIMA versions