(15804) Yenisei Main-belt Asteroid
Discovered on 9 March 1994 by E. W. Elst at Caussols.
Rising near the Mongolian border, two headstreams of the Yenisei proceed westward across Siberia and converge at Kyzyl. Then flowing generally northward, the river passes Krasnoyarsk and reaches the Kara Sea. Of its many tributaries the Podkamennaya Tunguska is known from its proximity to the 1908 impact event.Naming citation (20060613/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Yenisei is today
Seen from above the solar system on 2026-10-14: Yenisei is 2.88 au from the Sun and 3.79 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 15804 |
| Provisional designation | 1994 EY5 |
| Orbit class | Main-belt Asteroid |
| Diameter | 10.2 km (#4,992 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0660 |
| Absolute magnitude (H) | 13.66 |
| Orbital period | 4.53 years |
| Semi-major axis | 2.74 au |
| Perihelion – aphelion | 2.60 – 2.88 au |
| Eccentricity | 0.0517 |
| Inclination | 6.28° |
| Closest distance between its orbit and Earth's (MOID) | 1.61 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 March 1994
- (8886) Elaeagnus
- (9389) Condillac
- (10838) Lebon
- (11958) Galiani
- (20082) Yannlecun
- (23549) Epicles
- (32893) van der Waals