(21576) McGivney Main-belt Asteroid
Discovered on 19 September 1998 by W. G. Dillon at Needville.
Michael J. McGivney (1852-1890), parish priest of St. Mary's Church in New Haven, Connecticut, founded the Knights of Columbus to address the plight of immigrant Catholics.Naming citation (20061109/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where McGivney is today
Seen from above the solar system on 2026-10-14: McGivney is 3.18 au from the Sun and 2.47 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21576 |
| Provisional designation | 1998 SH4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 8.89 km (#5,840 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0810 |
| Absolute magnitude (H) | 13.91 |
| Orbital period | 5.64 years |
| Semi-major axis | 3.17 au |
| Perihelion – aphelion | 2.72 – 3.61 au |
| Eccentricity | 0.140 |
| Inclination | 2.19° |
| Closest distance between its orbit and Earth's (MOID) | 1.71 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Michael
- (3192) A'Hearn
- (4477) Kelley
- (4599) Rowan
- (5373) Michaelkurtz
- (5554) Keesey
- (5569) Colby
- (6406) Mikejura
- (6569) Ondaatje
- (7738) Heyman
- (7936) Mikemagee
- (8032) Michaeladams
- (8129) Michaelbusch
All asteroids named after someone called Michael