3 Juno
Images of asteroid 3 Juno taken with the Hooker telescope show what appears to be a 96-kilometer-wide crater. The crater is visible as a darkened area in the lower left quadrant in the 833 nanometer and 934 nanometer images.
3 Juno is the ninth largest asteroid and third to be discovered, in 1804 by the German astronomer Karl Harding (1765–1834). Surface maps of Juno made from observations by the 100-inch Hooker Telescope at Mount Wilson Observatory in 2003 show the presence of what may be a 96-kilometer (60-mile) wide crater.
| diameter | 230 × 288 km |
| spectral class | S |
| albedo | 0.2 |
| rotational period | 7.2 hours |
| semimajor axis | 2.669 AU |
| perihelion | 1.979 AU |
| aphelion | 3.358 AU |
| eccentricity | 0.258 |
| inclination | 12.97° |
| period | 4.36 years |
