(3) Juno Main-belt Asteroid
Discovered on 1 September 1804 by K. Harding at Lilienthal.
🐶 Juno as a dog name🐱 Juno as a cat name
Where Juno is today
Seen from above the solar system on 2026-10-14: Juno is 2.59 au from the Sun and 2.27 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3 |
| Provisional designation | A804 RA |
| Orbit class | Main-belt Asteroid |
| Diameter | 247 km (#13 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.214 |
| Rotation period | 7.21 hours |
| Spectral type | S |
| Absolute magnitude (H) | 5.19 |
| Orbital period | 4.37 years |
| Semi-major axis | 2.67 au |
| Perihelion – aphelion | 1.99 – 3.35 au |
| Eccentricity | 0.256 |
| Inclination | 13.0° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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