Transit Research and Attitude Control
 TRAAC satellite | |
| Mission type | Space Physics and Engineering |
|---|---|
| Operator | U. S. Navy |
| COSPAR ID | 1961-031B |
| SATCAT no. | 00205 |
| Website | NASA NSSDC Master Catalog |
| Spacecraft properties | |
| Launch mass | 109 kilograms (240 lb) |
| Start of mission | |
| Launch date | 15 November 1961 22:19:00 UTC |
| Rocket | Thor |
| Launch site | Cape Canaveral |
| Orbital parameters | |
| Reference system | Eccentricity |
| Regime | Low Earth |
| Semi-major axis | 74,055 kilometres (46,016 mi) |
| Eccentricity | 0.01025 |
| Perigee altitude | 957 kilometres (595 mi) |
| Apogee altitude | 1.109 kilometres (0.689 mi) |
| Inclination | 32.4° |
| Period | 105.8 minutes |
The Transit Research and Attitude Control (TRAAC) satellite was launched by the U. S. Navy from Cape Canaveral along with Transit 4B on November 15, 1961.
Mission
The 109 kg satellite was used to test the feasibility of using gravity-gradient stabilization in Transit navigational satellites.[1] It provided information on the effects of radiation from nuclear explosions in space, as it was one of several satellites whose detectors provided data for the Starfish Prime test; ultimately its solar cells were damaged by the radiation and it ceased operation.[2] (It was among several satellites which were inadvertently damaged or destroyed by the Starfish Prime high-altitude nuclear test on July 9, 1962 and subsequent radiation belt.) It is expected to orbit for 800 years at an altitude of about 950 kilometres (590 mi).
Poem
The first poem to be launched into orbit about the Earth was inscribed on the instrument panel of TRAAC. Entitled Space Prober and written by Prof. Thomas G. Bergin of Yale University, it reads in part:
- And now 'tis man who dares assault the sky...
- And as we come to claim our promised place, aim only to repay the good you gave,
- And warm with human love the chill of space.[3]
References
- ^ "TRAAC". Gunter's Space Pages. Retrieved 2007-10-07.
- ^ Hess, Wilmot N. (September 1964). "The Effects of High Altitude Explosions" (PDF). National Aeronautics and Space Administration. NASA TN D-2402. Retrieved 2007-10-07.
{{cite journal}}: Cite journal requires|journal=(help) - ^ "Space Quotes". Space Educator's Handbook. NASA. Archived from the original on 2012-12-13. Retrieved 2007-10-07.
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