(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 | 3.68 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 41.907410 ± 0.000279 au |
| Eccentricity | 0.144061144 ± 0.000005583 |
| Inclination | 17.706927419 ± 0.000014750 ° |
| Longitude of ascending node | 216.224998 ± 0.000114 ° |
| Argument of perihelia | 212.535740 ± 0.001228 ° |
| Mean anomaly | 228.381654 ± 0.001490 ° |
| Orbital period | 271.30 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv10 |
| Observation file |
omc_ast_NIMAv10.txt |
| bsp file | 307261_2002MS4_nima_v10.bsp |
| Date of first observation | 1954-04-08 |
| Date of last observation | 2022-07-04 |
| Number of observations used in the fit | 233 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 128 |
| Number of unpublished observations | 111 |
| RMS of observations | 0.140 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv10 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.010 | 0.007 |
| 2022-07 | 0.014 | 0.008 |
| 2023-01 | 0.015 | 0.009 |
| 2023-07 | 0.019 | 0.010 |
| 2024-01 | 0.020 | 0.011 |
| 2024-07 | 0.025 | 0.013 |
| 2025-01 | 0.026 | 0.013 |
| 2025-07 | 0.032 | 0.016 |
| 2026-01 | 0.033 | 0.016 |
Ephemeris comparison
Difference between NIMAv10 and JPL18 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.