(23617) Duna Outer Main-belt Asteroid
Discovered on 17 April 1996 by E. W. Elst at La Silla.
The Duna is the ancient name of the Daugava river, upon which the Latvian capital of Riga has been built. With a total length of 1020 km, it has its source in the Valdai hills of Russia, flows also through Belarus and drains into the Gulf of Riga, a bay of the Baltic Sea.Naming citation (20070601/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Duna is today
Seen from above the solar system on 2026-10-14: Duna is 3.10 au from the Sun and 2.64 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 23617 |
| Provisional designation | 1996 HM13 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 15.9 km (#2,905 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0580 |
| Absolute magnitude (H) | 13.02 |
| Orbital period | 5.73 years |
| Semi-major axis | 3.20 au |
| Perihelion – aphelion | 2.87 – 3.53 au |
| Eccentricity | 0.103 |
| Inclination | 17.3° |
| Closest distance between its orbit and Earth's (MOID) | 1.88 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 17 April 1996
- (7537) Solvay
- (8116) Jeanperrin
- (8308) Julie-Melissa
- (9430) Erichthonios
- (9664) Brueghel
- (13177) Hansschmidt
- (13644) Lynnanderson
- (15364) Kenglover
- (15861) Ispahan
- (16730) Nijisseiki
- (16731) Mitsumata
- (18493) Demoleon