Bennu

eccentricity

.2037450762416414 ± 6.9748E-11

semi-major axis

1.126391025894812 au ± 1.9673E-10

perihelion distance

.8968944004459729 au ± 2.3047E-10

inclination; angle with respect to x-y ecliptic plane

6.03494377024794 deg ± 6.8601E-9

longitude of the ascending node

2.06086619569642 deg ± 5.5577E-8

argument of perihelion

66.22306084084298 deg ± 6.4419E-8

mean anomaly

101.703952002457 deg ± 4.2749E-8

time of perihelion passage

2455439.141940872670 TDB ± 2.2536E-8

sidereal orbital period

436.6487281120201 d ± 1.144E-7

mean motion

.8244613503320309 deg/d ± 2.16E-10

aphelion distance

1.355887651343651 au ± 2.3681E-10

absolute magnitude

20.21 ± 0.03

magnitude slope

-0.031 ± 0.009

diameter

0.48444 km ± 0.00030

extent

0.5047 x 0.4918 x 0.4567 km ± 0.002 x 0.002 x 0.002

GM

4.8904e-9 km^3/s^2 ± 0.0009e-9

bulk density

1.194 g/cm^3 ± 0.003

rotation period

4.296061 h ± 0.000002

rotational acceleration

6.34e-8 rad/d^2 ± 0.91e-8

pole direction

85.4522/-60.3678 ± 0.0003/0.0001

geometric albedo

0.044 ± 0.002

thermal inertia

300 J/m^2/s^0.5/K ± 30

B-V

0.64 ± 0.04

U-B

0.16 ± 0.05

I-R

-0.33 ± 0.06

SMASSII spectral type

B

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 2455562.5 TDB.