(4617) Zadunaisky Outer Main-belt Asteroid
Discovered on 22 February 1976 by Felix Aguilar Observatory at El Leoncito.
Pedro E. Zadunaisky (b. 1918), one of the most active celestial mechanicians in Argentina, worked in particular on the orbits of comet 1P/Halley and Saturn IX (Phoebe). His monograph A Guide to Celestial Mechanics was published in 1961.Naming citation (20000726/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Zadunaisky is today
Seen from above the solar system on 2026-10-14: Zadunaisky is 3.18 au from the Sun and 2.47 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4617 |
| Provisional designation | 1976 DK |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 32.7 km (#1,242 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0490 |
| Absolute magnitude (H) | 11.36 |
| Orbital period | 5.75 years |
| Semi-major axis | 3.21 au |
| Perihelion – aphelion | 2.98 – 3.44 au |
| Eccentricity | 0.0719 |
| Inclination | 18.7° |
| Closest distance between its orbit and Earth's (MOID) | 2.06 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Pedro
- (4443) Paulet
- (10694) Lacerda
- (11265) Hasselmann
- (13082) Gutierrez
- (17041) Castagna
- (20227) Bernardinelli
- (24048) Pedroduque
- (31648) Pedrosada
- (32599) Pedromachado
- (35623) Pedrodavid
- (249539) Pedrosevilla
- (554239) Montseypedro
All asteroids named after someone called Pedro