Hygiea

eccentricity

.1067092741240963 ± 4.3184E-9

semi-major axis

3.150974033963701 au ± 2.4864E-9

perihelion distance

2.814735882015559 au ± 1.3021E-8

inclination; angle with respect to x-y ecliptic plane

3.829529946447122 deg ± 3.7979E-7

longitude of the ascending node

283.1198927508594 deg ± 5.3532E-6

argument of perihelion

312.4242387344704 deg ± 5.5908E-6

mean anomaly

252.0344242359649 deg ± 2.1489E-6

time of perihelion passage

2461813.200828681790 TDB ± 1.269E-5

sidereal orbital period

2042.987283349627 d ± 2.4182E-6

mean motion

.1762125505792448 deg/d ± 2.0857E-10

aphelion distance

3.487212185911843 au ± 2.7517E-9

absolute magnitude

5.65

diameter

407.12 km ± 6.8

GM

7. km^3/s^2

rotation period

13.828 h

geometric albedo

0.0717 ± 0.002

B-V

0.696 ± 0.020

U-B

0.351 ± 0.034

Tholen spectral type

C

SMASSII spectral type

C

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.