(4478) Blanco Main-belt Asteroid
Discovered on 23 April 1984 by Ferreri, W., Zappala, V. at La Silla.
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Where Blanco is today
Seen from above the solar system on 2026-10-14: Blanco is 2.54 au from the Sun and 2.16 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4478 |
| Provisional designation | 1984 HG1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.52 km (#13,908 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.347 |
| Absolute magnitude (H) | 14.22 |
| Orbital period | 3.37 years |
| Semi-major axis | 2.25 au |
| Perihelion – aphelion | 1.94 – 2.55 au |
| Eccentricity | 0.135 |
| Inclination | 3.28° |
| Closest distance between its orbit and Earth's (MOID) | 0.927 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.