(9178) Momoyo Main-belt Asteroid
Discovered on 23 February 1991 by Inoda, S., Urata, T. at Karasuyama.
Momoyo Urata is the wife of the second discoverer.Naming citation (20050407/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Momoyo is today
Seen from above the solar system on 2026-10-14: Momoyo is 3.09 au from the Sun and 3.82 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9178 |
| Provisional designation | 1991 DU |
| Orbit class | Main-belt Asteroid |
| Diameter | 5.63 km (#9,512 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.202 |
| Absolute magnitude (H) | 13.87 |
| Orbital period | 4.88 years |
| Semi-major axis | 2.88 au |
| Perihelion – aphelion | 2.64 – 3.11 au |
| Eccentricity | 0.0814 |
| Inclination | 2.26° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.