Explorer 9
| Use attributes for filter ! | |
| Periods | 2 hours |
|---|---|
| Inclination | 38. 8° |
| Launch date | February 16, 1961 |
| Manufacturers | NASA - Langley Research Center |
| Launch site | Wallops Flight Facility Launch Area 3 |
| Date of Reg. | |
| Date of Upd. | |
| ID | 2553099 |
About Explorer 9
Explorer 9, known as S-56A before launch, was an American satellite which was launched in 1961 to study the density and composition of the upper thermosphere and lower exosphere. It was a reflight of the failed S-56 mission, and consisted of a 7-kilogram, 3. 7-meter balloon which was deployed into a medium Earth orbit.
