(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 | 41.924415 ± 0.000412 au |
| Eccentricity | 0.140010776 ± 0.000008282 |
| Inclination | 17.667697621 ± 0.000118837 ° |
| Longitude of ascending node | 215.902743 ± 0.000341 ° |
| Argument of perihelia | 214.232296 ± 0.001664 ° |
| Mean anomaly | 220.520588 ± 0.001780 ° |
| Orbital period | 271.46 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 307261_2002MS4_nima_v8.bsp |
| Date of first observation | 1954-04-08 |
| Date of last observation | 2019-08-31 |
| Number of observations used in the fit | 153 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 75 |
| Number of unpublished observations | 91 |
| RMS of observations | 0.164 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.004 | 0.009 |
| 2019-07 | 0.005 | 0.003 |
| 2020-01 | 0.007 | 0.009 |
| 2020-07 | 0.010 | 0.005 |
| 2021-01 | 0.013 | 0.010 |
| 2021-07 | 0.017 | 0.008 |
| 2022-01 | 0.020 | 0.012 |
| 2022-07 | 0.025 | 0.012 |
| 2023-01 | 0.028 | 0.014 |
Ephemeris comparison
Difference between NIMAv8 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.