(3187) Dalian Main-belt Asteroid
Discovered on 10 October 1977 by Purple Mountain Observatory at Nanking.
Where Dalian is today
Seen from above the solar system on 2026-10-14: Dalian is 2.19 au from the Sun and 2.26 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 3187 |
| Provisional designation | 1977 TO3 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.22 km (#8,610 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.262 |
| Rotation period | 2.71 hours |
| Absolute magnitude (H) | 13.33 |
| Orbital period | 3.45 years |
| Semi-major axis | 2.28 au |
| Perihelion – aphelion | 2.15 – 2.41 au |
| Eccentricity | 0.0574 |
| Inclination | 2.75° |
| Closest distance between its orbit and Earth's (MOID) | 1.16 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.