(9917) Keynes Main-belt Asteroid
Discovered on 26 June 1979 by C. Torres at Cerro El Roble.
British economist John Maynard Keynes (1883-1946) set down the foundations of macroeconomics with his General Theory of Employment, Interest and Money (1936). Although his ideas fell largely out of favor during the 1970s, they were widely revived in 2007--2008 as a cure for the worldwide recession.Naming citation (20090209/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Keynes is today
Seen from above the solar system on 2026-10-14: Keynes is 2.22 au from the Sun and 2.80 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 9917 |
| Provisional designation | 1979 MK |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.09 km (#12,517 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.421 |
| Absolute magnitude (H) | 14.01 |
| Orbital period | 3.65 years |
| Semi-major axis | 2.37 au |
| Perihelion – aphelion | 2.05 – 2.69 au |
| Eccentricity | 0.134 |
| Inclination | 6.37° |
| Closest distance between its orbit and Earth's (MOID) | 1.04 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called John
- (3882) Johncox
- (3893) DeLaeter
- (4089) Galbraith
- (4147) Lennon
- (4525) Johnbauer
- (4656) Huchra
- (4987) Flamsteed
- (5207) Hearnshaw
- (5216) Cannizzo
- (5362) Johnyoung
- (5517) Johnerogers
- (5558) Johnnapier
All asteroids named after someone called John