(42301) 2001UR163
Object
| Object |
(42301) 2001UR163 |
| Diameter(1) |
367 km |
| Dynamic class(1) |
res4:9 |
| Absolute magnitude |
4.20 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
51.843374 ± 0.002888 au |
| Eccentricity |
0.280438263 ± 0.000009978 |
| Inclination |
0.751151672 ± 0.000009923 ° |
| Longitude of ascending node |
302.347652 ± 0.007686 ° |
| Argument of perihelia |
343.806942 ± 0.011214 ° |
| Mean anomaly |
84.919773 ± 0.009916 ° |
| Orbital period |
373.29 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv6 |
| Observation file (documentation) |
omc_ast_NIMAv6.txt |
| bsp file |
42301_2001UR163_nima_v6.bsp |
| Date of first observation |
1982-07-27 |
| Date of last observation |
2024-12-26 |
| Number of observations used in the fit |
384 |
| Number of rejected observations |
2 |
| Number of DES observations |
0 |
| Number of MPC observations |
386 |
| Number of unpublished observations |
0 |
| RMS of observations |
0.147 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.077 |
0.061 |
| 2024-07 |
0.105 |
0.065 |
| 2025-01 |
0.085 |
0.065 |
| 2025-07 |
0.119 |
0.071 |
| 2026-01 |
0.095 |
0.071 |
| 2026-07 |
0.134 |
0.077 |
| 2027-01 |
0.106 |
0.076 |
| 2027-07 |
0.150 |
0.083 |
| 2028-01 |
0.119 |
0.081 |
Ephemeris comparison
Difference between NIMAv6 and JPL25 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