(22694) Tyndall Main-belt Asteroid
Discovered on 26 August 1998 by E. W. Elst at La Silla.
Irish natural philosopher John Tyndall (1820-1893) made fundamental investigations of the motion of glaciers, insisting that the flow is due to fracture and regelation. He is well known for the “Tyndall effect” in suspensions.Naming citation (20070601/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Tyndall is today
Seen from above the solar system on 2026-10-14: Tyndall is 2.36 au from the Sun and 1.76 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 22694 |
| Provisional designation | 1998 QF104 |
| Orbit class | Main-belt Asteroid |
| Diameter | 6.40 km (#8,378 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.248 |
| Rotation period | 5.78 hours |
| Absolute magnitude (H) | 13.38 |
| Orbital period | 4.04 years |
| Semi-major axis | 2.54 au |
| Perihelion – aphelion | 2.28 – 2.80 au |
| Eccentricity | 0.102 |
| Inclination | 14.9° |
| Closest distance between its orbit and Earth's (MOID) | 1.32 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
Also discovered on 26 August 1998
- (10637) Heimlich
- (12893) Mommert
- (12895) Balbastre
- (12896) Geoffroy
- (13293) Mechelen
- (21553) Monchicourt
- (21564) Widmanstatten
- (22692) Carfrekahl
- (25029) Ludwighesse
- (28078) Mauricehilleman