(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 | 41.924493 ± 0.000188 au |
| Eccentricity | 0.140009274 ± 0.000003520 |
| Inclination | 17.667696906 ± 0.000050922 ° |
| Longitude of ascending node | 215.902736 ± 0.000248 ° |
| Argument of perihelia | 214.232164 ± 0.001397 ° |
| Mean anomaly | 220.520654 ± 0.001494 ° |
| Orbital period | 271.46 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv9 |
| Observation file |
omc_ast_NIMAv9.txt |
| bsp file | 307261_2002MS4_nima_v9.bsp |
| Date of first observation | 1954-04-08 |
| Date of last observation | 2021-02-24 |
| Number of observations used in the fit | 183 |
| Number of rejected observations | 9 |
| Number of DES observations | 0 |
| Number of MPC observations | 78 |
| Number of unpublished observations | 114 |
| RMS of observations | 0.153 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv9 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.004 | 0.004 |
| 2021-07 | 0.006 | 0.005 |
| 2022-01 | 0.007 | 0.006 |
| 2022-07 | 0.010 | 0.007 |
| 2023-01 | 0.011 | 0.008 |
| 2023-07 | 0.013 | 0.010 |
| 2024-01 | 0.015 | 0.010 |
| 2024-07 | 0.018 | 0.012 |
| 2025-01 | 0.019 | 0.013 |
Ephemeris comparison
Difference between NIMAv9 and JPL17 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.