(1928) Summa Main-belt Asteroid
Discovered on 21 September 1938 by Y. Vaisala at Turku.
Named for a village on the Karelian isthmus, scene of violent battles during the Finnish winter war.Naming citation (MPC 5450), IAU / Minor Planet Center, via NASA/JPL
Where Summa is today
Seen from above the solar system on 2026-10-14: Summa is 2.90 au from the Sun and 3.87 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 1928 |
| Provisional designation | 1938 SO |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.33 km (#5,527 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.160 |
| Rotation period | 6.85 hours |
| Absolute magnitude (H) | 12.82 |
| Orbital period | 3.90 years |
| Semi-major axis | 2.48 au |
| Perihelion – aphelion | 1.97 – 2.98 au |
| Eccentricity | 0.204 |
| Inclination | 4.58° |
| Closest distance between its orbit and Earth's (MOID) | 0.962 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 21 September 1938
More named asteroids discovered by Y. Vaisala
- (1391) Carelia
- (1398) Donnera
- (1405) Sibelius
- (1406) Komppa
- (1407) Lindelof
- (1421) Esperanto
- (1424) Sundmania
- (1446) Sillanpaa
- (1447) Utra
- (1448) Lindbladia
- (1449) Virtanen
- (1450) Raimonda
← (1927) Suvanto · (1929) Kollaa →