| Official name | VANGUARD R/B |
| Alternative name | Grand Central (ALB) (Vanguard) |
| Cospar ID | 1959-001B |
| Norad ID | 12 |
| Launch date | 1959-02-17 |
| Launch site | AFETR |
| RCS size | MEDIUM |
| Decay date | ON ORBIT |
| Period (min) | 125.63 |
| Inclination (deg) | 32.9 |
| Perigee (km) | 556 |
| Apogee (km) | 3306 |
| Eccentricity | 0.71206628689798 |
| Mean motion (revs. per day) | 11.4622303589907 |
| Semi-Major axis (km) | 8309.135 |
| Raan (deg) | 48.2309 |
| Arg of perigee (deg) | 3.3718 |
| Shape | Cyl |
| Mass (kg) | 22.79 |
| Diameter (m) | 0.7 |
| Height (m) | 1.5 |
| Span (m^2) | 1.5 |
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