Apophis

eccentricity

.1911492279663492 ± 1.8376E-9

semi-major axis

.9223592206975018 au ± 1.5667E-9

perihelion distance

.7460509677535309 au ± 2.8517E-9

inclination; angle with respect to x-y ecliptic plane

3.340996879880978 deg ± 9.903E-8

longitude of the ascending node

203.8936514240762 deg ± 3.0657E-6

argument of perihelion

126.6795706895841 deg ± 3.3086E-6

mean anomaly

175.3304026592739 deg ± 5.2809E-7

time of perihelion passage

2461042.919201488142 TDB ± 7.0729E-7

sidereal orbital period

323.5553366891694 d ± 8.244E-7

mean motion

1.112638115271892 deg/d ± 2.8349E-9

aphelion distance

1.098667473641473 au ± 1.8662E-9

absolute magnitude

19.09 ± 0.19

magnitude slope

0.24 ± 0.11

diameter

0.34 km ± 0.04

rotation period

30.56 h ± 0.01

geometric albedo

0.35 ± 0.10

thermal inertia

50-500 J/m^2/s^0.5/K

SMASSII spectral type

Sq

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.