(42301) 2001UR163
This object has a more recent orbit available here
Object
| Object | (42301) 2001UR163 |
| Diameter(1) | 671 km |
| Dynamic class(1) | res4:9 |
| Absolute magnitude | 4.10 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 51.461505 ± 0.005875 au |
| Eccentricity | 0.286886874 ± 0.000019983 |
| Inclination | 0.753148149 ± 0.000333920 ° |
| Longitude of ascending node | 301.366075 ± 0.068375 ° |
| Argument of perihelia | 343.178132 ± 0.053429 ° |
| Mean anomaly | 80.115133 ± 0.019208 ° |
| Orbital period | 369.17 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 42301_2001UR163_nima_v1.bsp |
| Date of first observation | 1982-07-27 |
| Date of last observation | 2016-10-31 |
| Number of observations used in the fit | 116 |
| Number of rejected observations | 0 |
| Number of DES observations | 0 |
| Number of MPC observations | 116 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.213 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) |
| 2018-01 | 0.132 | 0.106 |
| 2018-07 | 0.210 | 0.120 |
| 2019-01 | 0.142 | 0.113 |
| 2019-07 | 0.236 | 0.130 |
| 2020-01 | 0.157 | 0.121 |
| 2020-07 | 0.266 | 0.141 |
| 2021-01 | 0.176 | 0.130 |
| 2021-07 | 0.299 | 0.152 |
| 2022-01 | 0.199 | 0.139 |
Ephemeris comparison
Difference between NIMAv1 and JPL11 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.