| Asteroid | |
|---|---|
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| Sire | Lexington |
| Grandsire | Boston |
| Dam | Nebula |
| Damsire | Glencoe (GB) |
| Sex | Stallion |
| Foaled | 1861 |
| Country | United States |
| Colour | Bay |
| Breeder | Robert A. Alexander, Woodburn Stud |
| Owner | R. A. Alexander & A. J. Alexander |
| Record | 12:12-0-0 |
| Earnings | $9,700 |
| Last updated on 29 August 2009 | |
Asteroid was an undefeated American Thoroughbred racehorse who was one of the most successful racehorses in the United States during the 19th century.