(75063) Koestler Main-belt Asteroid
Discovered on 1 November 1999 by S. Sposetti at Gnosca.
Arthur Koestler (1905–1983) was a journalist and writer. He wrote The Sleepwalkers: A History of Man's Changing Vision of the Universe.Naming citation (WGSBN Bull. 3, #12, 9), IAU / Minor Planet Center, via NASA/JPL
Where Koestler is today
Seen from above the solar system on 2026-10-14: Koestler is 2.36 au from the Sun and 3.29 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 75063 |
| Provisional designation | 1999 VO8 |
| Orbit class | Main-belt Asteroid |
| Rotation period | 89.2 hours |
| Absolute magnitude (H) | 15.2 |
| Orbital period | 3.70 years |
| Semi-major axis | 2.39 au |
| Perihelion – aphelion | 2.12 – 2.66 au |
| Eccentricity | 0.113 |
| Inclination | 5.92° |
| Closest distance between its orbit and Earth's (MOID) | 1.14 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
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