(307261) 2002MS4


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 (documentation) 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Number of unpublished observations 114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

residual plot

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

residual plot

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.

Previous NIMA versions