(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 41.924415 ± 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 (documentation) 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Number of unpublished observations 91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

residual plot

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

residual plot

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.

Previous NIMA versions