Eros

eccentricity

.2228779627700761 ± 9.3902E-9

semi-major axis

1.458243716760167 au ± 1.5185E-10

perihelion distance

1.133233327946397 au ± 1.3695E-8

inclination; angle with respect to x-y ecliptic plane

10.82854410314273 deg ± 1.158E-6

longitude of the ascending node

304.2679713350896 deg ± 3.5792E-6

argument of perihelion

178.9181319135911 deg ± 3.9825E-6

mean anomaly

62.51145501986792 deg ± 1.4849E-6

time of perihelion passage

2461088.813494039683 TDB ± 2.647E-6

sidereal orbital period

643.1963890927677 d ± 1.0047E-7

mean motion

.5597046347038453 deg/d ± 8.7425E-11

aphelion distance

1.783254105573937 au ± 1.8569E-10

absolute magnitude

10.40

magnitude slope

0.46

diameter

16.84 km ± 0.06

extent

34.4x11.2x11.2 km

GM

4.463e-04 km^3/s^2 ± 0.001e-04

bulk density

2.67 g/cm^3 ± 0.03

rotation period

5.27 h

pole direction

11.37/17.22 ± 0.05

geometric albedo

0.25 ± 0.06

B-V

0.921 ± 0.021

U-B

0.531 ± 0.027

Tholen spectral type

S

SMASSII spectral type

S

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.