(307261) 2002MS4
This object has a more recent orbit available here
Object
| Object | (307261) 2002MS4 |
| Diameter(1) | 934 km |
| Dynamic class(1) | cubewano |
| Absolute magnitude | 3.60 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 41.924701 ± 0.001369 au |
| Eccentricity | 0.140004907 ± 0.000027647 |
| Inclination | 17.667679929 ± 0.000399492 ° |
| Longitude of ascending node | 215.902648 ± 0.000805 ° |
| Argument of perihelia | 214.232096 ± 0.002541 ° |
| Mean anomaly | 220.520532 ± 0.002520 ° |
| Orbital period | 271.46 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 307261_2002MS4_nima_v4.bsp |
| Date of first observation | 1954-04-08 |
| Date of last observation | 2017-08-25 |
| Number of observations used in the fit | 127 |
| Number of rejected observations | 10 |
| Number of DES observations | 0 |
| Number of MPC observations | 71 |
| Number of unpublished observations | 66 |
| RMS of observations | 0.160 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.065 | 0.057 |
| 2018-07 | 0.074 | 0.062 |
| 2019-01 | 0.077 | 0.064 |
| 2019-07 | 0.087 | 0.071 |
| 2020-01 | 0.091 | 0.072 |
| 2020-07 | 0.103 | 0.081 |
| 2021-01 | 0.108 | 0.080 |
| 2021-07 | 0.122 | 0.091 |
| 2022-01 | 0.127 | 0.088 |
Ephemeris comparison
Difference between NIMAv4 and JPL14 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.