(134340) Pluto


Object

Object (134340) Pluto
Diameter(1) 2377 km
Dynamic class(1) plutino
Absolute magnitude -0.76
G slop 0.12
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 39.846028 ± 0.000114 au
Eccentricity 0.253752224 ± 0.000001671
Inclination 17.103375397 ± 0.000012326 °
Longitude of ascending node 110.297275 ± 0.000041 °
Argument of perihelia 115.011241 ± 0.000253 °
Mean anomaly 41.547288 ± 0.000302 °
Orbital period 251.53 yr

Ephemeris & Observations

Ephemeris version NIMAv8
Observation file omc_ast_NIMAv8.txt
bsp file 134340_Pluto_nima_v8.bsp
Date of first observation 1988-06-09
Date of last observation 2016-07-19
Number of observations used in the fit 19
Number of rejected observations 4
Number of DES observations 0
Number of MPC observations 0
Number of unpublished observations 23
RMS of observations 0.002 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)
2018-01 0.003 0.002
2018-07 0.005 0.002
2019-01 0.005 0.002
2019-07 0.007 0.002
2020-01 0.007 0.002
2020-07 0.010 0.002
2021-01 0.009 0.002
2021-07 0.012 0.002
2022-01 0.011 0.002

Ephemeris comparison

residual plot

Difference between NIMAv8 and JPLDE436 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