| Mission type | Technology |
|---|---|
| Operator | US Air Force/ARPA |
| Harvard designation | 1960 Tau 1 |
| COSPAR ID | 1960-019A |
| SATCAT no. | 00068 |
| Spacecraft properties | |
| Bus | Agena-B |
| Manufacturer | Lockheed |
| Launch mass | 1,060 kilograms (2,340 lb) |
| Start of mission | |
| Launch date | 20 December 1960, 20:32 UTC |
| Rocket | Thor DM-21 Agena-B 258 |
| Launch site | Vandenberg LC-75-3-5 |
| End of mission | |
| Decay date | 23 January 1961 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Low Earth |
| Perigee altitude | 206 kilometers (128 mi) |
| Apogee altitude | 578 kilometers (359 mi) |
| Inclination | 83.4 degrees |
| Period | 92.4 minutes |
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Discoverer 19, also known as RM-1, was an American satellite which was launched in 1960. It was a technology demonstration spacecraft, based on an Agena-B.[1]
The launch of Discoverer 19 occurred at 20:32 UTC on 20 December 1960. A Thor DM-21 Agena-B rocket was used, flying from Launch Complex 75-3-5 at the Vandenberg Air Force Base.[2] Upon successfully reaching orbit, it was assigned the Harvard designation 1960 Tau 1.
Discoverer 19 was operated in a low Earth orbit, with a perigee of 206 kilometres (128 mi), an apogee of 578 kilometres (359 mi), 83.4 degrees of inclination, and a period of 92.4 minutes.[3] The satellite had a mass of 1,060 kilograms (2,340 lb),[4] and was used to demonstrate technology for the Midas programme,[5] including infrared sensors.[4] Communication with the satellite was lost on Christmas Day 1960. It remained in orbit until 23 January 1961,[3] when it decayed and reentered the atmosphere.
- ^ Krebs, Gunter. "RM 1, 2 (Discoverer 19, 21)". Gunter's Space Page. Retrieved 30 June 2010.
- ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 30 June 2010.
- ^ a b McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 30 June 2010.
- ^ a b Wade, Mark. "Midas". Encyclopedia Astronautica. Archived from the original on 20 November 2010. Retrieved 30 June 2010.
- ^ "Discoverer 19". NSSDC Master Catalog. NASA. Retrieved 30 June 2010.