(24618) Johnduffey Main-belt Asteroid
Discovered on 6 December 1978 by Bowell, E., Warnock, A. at Palomar.
John Duffey (1934–1996) was an influential American bluegrass musician, mandolin player and vocalist. Duffey was a founding member of two important bluegrass bands, the Country Gentlemen and the Seldom Scene. He was inducted with the original Country Gentlemen into the International Bluegrass Music Association's Hall of Fame in 1996.Naming citation (WGSBN Bull. 6, #3, 9), IAU / Minor Planet Center, via NASA/JPL
Where Johnduffey is today
Seen from above the solar system on 2026-10-14: Johnduffey is 3.21 au from the Sun and 4.17 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 24618 |
| Provisional designation | 1978 XD1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.51 km (#13,930 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.249 |
| Absolute magnitude (H) | 14.42 |
| Orbital period | 5.13 years |
| Semi-major axis | 2.97 au |
| Perihelion – aphelion | 2.64 – 3.30 au |
| Eccentricity | 0.111 |
| Inclination | 3.09° |
| Closest distance between its orbit and Earth's (MOID) | 1.65 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called John
- (3882) Johncox
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- (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
Also discovered on 6 December 1978
- (4779) Whitley
- (10461) Dawilliams
- (11261) Krisbecker
- (12666) Mikeauldridge
- (19091) Hagen
- (69239) Johnstarling