Patroclus

eccentricity

.1391467916238868 ± 1.2747E-8

semi-major axis

5.205975173988769 au ± 2.6457E-8

perihelion distance

4.481580431254625 au ± 8.2393E-8

inclination; angle with respect to x-y ecliptic plane

22.06359071054631 deg ± 9.1114E-7

longitude of the ascending node

44.34968792774898 deg ± 2.4664E-6

argument of perihelion

308.8377281363527 deg ± 4.4227E-6

mean anomaly

58.67543160284279 deg ± 4.2416E-6

time of perihelion passage

2460493.360075115778 TDB ± 4.9613E-5

sidereal orbital period

4338.619521053271 d ± 3.3074E-5

mean motion

.08297570189160172 deg/d ± 6.3253E-10

aphelion distance

5.930369916722912 au ± 3.0138E-8

absolute magnitude

8.22

diameter

140.362 km ± 0.868

rotation period

102.8 h

geometric albedo

0.047 ± 0.003

B-V

0.677 ± 0.013

U-B

0.215 ± 0.045

Tholen spectral type

P

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.