| b>140 Siwa |
| bgcolor="#ffc0c0" colspan="2" | Orbital characteristics 1 |
| a href="/encyclopedia/Orbit" title="Orbit">Orbit type | Main belt |
| a href="/encyclopedia/Semimajor-axis" title="Semimajor axis">Semimajor axis | 2.732 AU |
| a href="/encyclopedia/Perihelion" title="Perihelion">Perihelion distance | 2.143 AU |
| a href="/encyclopedia/Aphelion" title="Aphelion">Aphelion distance | 3.322 AU |
| a href="/encyclopedia/Orbital-period" title="Orbital period">Orbital period | 4.52 years |
| a href="/encyclopedia/Inclination" title="Inclination">Inclination | 3.19° |
| a href="/encyclopedia/Eccentricity" title="Eccentricity">Eccentricity | 0.216 |
| bgcolor="#ffc0c0" colspan="2" | Physical characteristics |
| a href="/encyclopedia/Diameter" title="Diameter">Diameter 6 | 103 km |
| a href="/encyclopedia/Mass" title="Mass">Mass 6 | 1.5 × 1018 kg |
| a href="/encyclopedia/Rotation-period" title="Rotation period">Rotation period | 18.5 hours |
| a href="/encyclopedia/Spectral-class" title="Spectral class">Spectral class 5 | P (C 6) |
| a href="/encyclopedia/Absolute-magnitude" title="Absolute magnitude">Abs. magnitude 1 | 8.34 |
| a href="/encyclopedia/Albedo" title="Albedo">Albedo 4 | 0.067 |
| bgcolor="#ffc0c0" colspan="2" | History 2 |
| iscoverer | J. Palisa, 1874 |