TD-1A
TD-1A, or Thor-Delta 1A (or just TD-1), was a European astrophysical research satellite which was launched in 1972. Operated by the European Space Research Organisation, TD-1A made astronomical surveys primarily in the ultraviolet, but also using x-ray and gamma ray detectors.
| Mission type | Astrophysics |
|---|---|
| Operator | ESRO |
| COSPAR ID | 1972-014A |
| SATCAT no. | 05879 |
| Spacecraft properties | |
| Launch mass | 473 kilograms (1,043 lb) |
| Start of mission | |
| Launch date | 12 March 1972, 01:55:08 UTC |
| Rocket | Delta N D88 |
| Launch site | Vandenberg SLC-2E |
| End of mission | |
| Decay date | 9 January 1980 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 525 kilometres (326 mi) |
| Apogee altitude | 544 kilometres (338 mi) |
| Inclination | 97.5 degrees |
| Period | 95.32 minutes |
| Epoch | 11 May 1972, 19:00:00 UTC |
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