(30840) Jackalice Main-belt Asteroid
Discovered on 15 April 1991 by Shoemaker, C. S., Levy, D. H. at Palomar.
Jack Newton (b. 1942) is a Canadian astrophotographer credited with some of the most famous ground-based photographs ever taken. His work, from the sun to a gravitational lens, has appeared in major news magazines. His wife Alice has long assisted him in every one of his outreach efforts, in both Canada and the U.S.Naming citation (20050919/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Jackalice is today
Seen from above the solar system on 2026-10-14: Jackalice is 2.71 au from the Sun and 2.65 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 30840 |
| Provisional designation | 1991 GC2 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.68 km (#11,268 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.292 |
| Absolute magnitude (H) | 13.83 |
| Orbital period | 4.33 years |
| Semi-major axis | 2.66 au |
| Perihelion – aphelion | 2.13 – 3.19 au |
| Eccentricity | 0.200 |
| Inclination | 12.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.17 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Jack
- (4600) Meadows
- (4693) Drummond
- (11409) Horkheimer
- (11443) Youdale
- (12909) Jaclifford
- (14511) Nickel
- (16016) Boylan
- (16055) Dellisanti
- (20023) Jackmegas
- (20489) Lissauer
- (22707) Jackgrundy
- (26647) Brabham
All asteroids named after someone called Jack