Polymele

eccentricity

.09592245810512318 ± 5.0285E-9

semi-major axis

5.191514133435046 au ± 3.485E-8

perihelion distance

4.693531336468467 au ± 5.5382E-8

inclination; angle with respect to x-y ecliptic plane

12.97735158439746 deg ± 7.3165E-8

longitude of the ascending node

50.33105662992578 deg ± 2.9888E-7

argument of perihelion

5.86529887136951 deg ± 2.9894E-6

mean anomaly

143.4220008064438 deg ± 1.5611E-6

time of perihelion passage

2459479.215080043361 TDB ± 2.524E-5

sidereal orbital period

4320.554501402195 d ± 4.3505E-5

mean motion

.08332263830560761 deg/d ± 8.39E-10

aphelion distance

5.689496930401624 au ± 3.8193E-8

absolute magnitude

11.77

magnitude slope

0.22 ± 0.02

diameter

21.075 km ± 0.136

rotation period

5.8607 h ± 0.0005

geometric albedo

0.091 ± 0.017

Published JPL orbital elements describe their stated epoch; they are not current positions. Small-body diameters can be effective/model-dependent sizes, not spherical shapes. Missing measurements remain unavailable. Pluto’s diameter uses the New Horizons reference rather than an empty SBDB field. Orbital epoch: JD 2461200.5 TDB.