(12590) Ballantine Main-belt Asteroid
Discovered on 9 September 1999 by LINEAR at Socorro.
Mary Shea Ballantine (b. 2006) was a finalist in the 2019 Broadcom MASTERS, a math and science competition for middle-school students, for her microbiology and biochemistry project. She attended the Saint Francis of Assisi Catholic School, Louisville, Kentucky.Naming citation (WGSBN Bull. 3, #1, 7), IAU / Minor Planet Center, via NASA/JPL
Where Ballantine is today
Seen from above the solar system on 2026-10-14: Ballantine is 2.73 au from the Sun and 3.50 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 12590 |
| Provisional designation | 1999 RN125 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.32 km (#12,011 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.377 |
| Absolute magnitude (H) | 13.91 |
| Orbital period | 4.70 years |
| Semi-major axis | 2.81 au |
| Perihelion – aphelion | 2.68 – 2.93 au |
| Eccentricity | 0.0433 |
| Inclination | 5.00° |
| Closest distance between its orbit and Earth's (MOID) | 1.67 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Mary
- (4793) Slessor
- (5595) Roth
- (6603) Marycragg
- (7091) Maryfields
- (7958) Leakey
- (9824) Marylea
- (10870) Gwendolen
- (11369) Brazelton
- (12627) Maryedwards
- (12628) Acworthorr
- (13412) Guerrieri
- (15107) Toepperwein
All asteroids named after someone called Mary
Also discovered on 9 September 1999
- (12127) Mamiya
- (12130) Mousa
- (12589) Davidanand
- (12591) Bergey
- (12592) Brianchen
- (12593) Shashlov
- (12594) Sidorclare
- (12595) Amandashaw
- (12596) Shukla
- (12597) Williamdaniel
- (12598) Sierra
- (12599) Singhal