(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 | 41.924055 ± 0.000743 au |
| Eccentricity | 0.140018031 ± 0.000015016 |
| Inclination | 17.667693789 ± 0.000206647 ° |
| Longitude of ascending node | 215.902724 ± 0.000426 ° |
| Argument of perihelia | 214.232770 ± 0.001736 ° |
| Mean anomaly | 220.520536 ± 0.001782 ° |
| Orbital period | 271.46 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 307261_2002MS4_nima_v7.bsp |
| Date of first observation | 1954-04-08 |
| Date of last observation | 2019-08-31 |
| Number of observations used in the fit | 149 |
| Number of rejected observations | 12 |
| Number of DES observations | 0 |
| Number of MPC observations | 75 |
| Number of unpublished observations | 86 |
| RMS of observations | 0.167 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.005 | 0.017 |
| 2019-07 | 0.007 | 0.004 |
| 2020-01 | 0.010 | 0.017 |
| 2020-07 | 0.015 | 0.006 |
| 2021-01 | 0.018 | 0.017 |
| 2021-07 | 0.025 | 0.010 |
| 2022-01 | 0.029 | 0.018 |
| 2022-07 | 0.037 | 0.013 |
| 2023-01 | 0.041 | 0.019 |
Ephemeris comparison
Difference between NIMAv7 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.