521:
88:
510:
529:
595:
orbit and carried out vehicular performance and communications tests, successfully gathering data on propulsion, communications, orbital performance, and stabilization. All equipment functioned as programmed except the timing device. Satellite telemetry functioned until April 14, 1959, and the main tracking beacon functioned until April 21, 1959. The satellite bus reentered on 26 April 1959.
914:
552:
spacecraft performance, including 28 environmental, 34 guidance and control, 18 second stage performance, 15 communications, and 9 reentry capsule parameters. Electrical power for all instruments was provided by NiCd batteries. Orientation was provided by a cold nitrogen gas jet-stream system, a scanner for pitch attitude, and an inertial reference package for yaw and roll data.
34:
611:, launched on August 18, 1960. The program ultimately comprised 145 flights in eight satellite series, the last mission launching on 25 May 1972. CORONA was declassified in 1995, and a formal acknowledgement of the existence of US reconnaissance programs, past and present, was issued in September 1996.
584:
With the aid of
Norwegian troops, the Air Force mounted an intensive search for the SRV but was unable to find it, and the search was called off on April 22. At least one post-action memo reported evidence that Discoverer 2's capsule had fallen into the possession of the Soviet Union (ski tracks near
551:
The capsule was designed to be recovered by a specially equipped aircraft during parachute descent, but was also designed to float to permit recovery from the ocean. The main spacecraft contained a telemetry transmitter and a tracking beacon. The telemetry could transmit over 100 measurements of the
435:
spy satellite series. Discoverer 2 was the first satellite to be stabilized in orbit in all three axes and to be maneuvered on command from the earth. Though it carried no film and thus conducted no surveillance, Discoverer 2 was both the first satellite equipped with a reentry capsule and the first
580:
Though Norway was a
Western ally and a member of NATO, the Soviet Union, which shared a border with the Scandinavian country, had a lease to operate several mining facilities on the island. The Air Force was thus vague when it announced that the Hawaiian capsule recovery had been canceled and that,
536:
The battery-powered
Discoverer 2 was a cylindrical satellite 1.5 metres (4 ft 11 in) in diameter, 5.85 metres (19.2 ft) long and had a mass after second stage separation, including propellants, of roughly 3,800 kilograms (8,400 lb). After orbital insertion, the satellite and SRV
594:
Though the SRV recovery was a failure, Discoverer 2 was the first satellite to be stabilized in orbit in all three axes, to be maneuvered on command from the earth, to separate a reentry vehicle on command, and to send its reentry vehicle back to earth. The main instrumentation payload remained in
540:
Instead of a camera and film, Discoverer 2's recovery package included cosmic-ray film packs to determine the intensity and composition of cosmic radiation. This emulsion experiment comprised two groups of films arranged horizontally and vertically to measure the intensity and direction of cosmic
572:
booster, Discoverer 2 was three-axis stabilized and was commanded from Earth. After 17 orbits, on 14 April 1959, a reentry vehicle was ejected. The reentry vehicle separated into two sections, one consisting of the protection equipment, retrorocket and main structure and the other the reentry
484:
upper stage, which not only offered housing but whose engine provided attitude control in orbit. The KH-1 payload included the C (for Corona) single, vertical-looking, panoramic camera that scanned back and forth, exposing its film at a right angle to the line of flight. The camera, built by
476:
in surveilling the Sino-Soviet Bloc, determining the disposition and speed of production of Soviet missiles and long-range bombers assess. The Corona program was also used to produce maps and charts for the
Department of Defense and other US government mapping programs.
585:
the impact zone), which could have provided limited intelligence to the Soviet government. This memo has been disputed, and the fate of
Discovery 2's SRV remained unknown as of 1998. The incident became the basis for the book and movie
573:
capsule. It was planned that the capsule would reenter over the vicinity of Hawaii for recovery, but a timer malfunction caused by human programming error lead to premature capsule ejection and reentry near the
Norwegian island of
489:
with a f/5.0 aperture and 61 centimetres (24 in) focal length, had a ground resolution of 12.9 metres (42 ft). Film was returned from orbit by a single
General Electric Satellite Return Vehicle (SRV) constructed by
541:
radiation and to distinguish among electrons, protons, and heavier charged particles. A metallic
Bismuth detector was designed to register induced changes in its sensors from which changes in
663:
494:. The SRV was equipped with an onboard small solid-fuel retro motor to deorbit at the end of the mission. Recovery of the capsule was done in mid-air by a specially equipped aircraft.
2779:
440:, Norway, rather than Hawaii. A joint US-Norway recovery operation was mounted, but was unsuccessful, and there was fear that the capsule ended in the possession of the
2985:
670:
520:
2772:
2980:
947:
497:
Discoverer 2 was the second in a series of three camera-less test flights preceding operational KH-1 flights. Its immediate predecessor,
465:
2765:
1203:
793:
561:
461:
214:
486:
60:
501:, which carried neither camera nor film capsule, was launched 28 February 1959 after a failed attempt on 21 January 1959.
548:
In addition, the spacecraft carried test life support equipment and a "mechanical mouse," a small biomedical payload.
509:
444:. Such claims have never been verified. The flight and loss of Discoverer 2 was the inspiration for the book and film
2731:
940:
428:
96:
75:
863:
2736:
56:
641:
81:
1196:
436:
to return a payload from orbit. A timing error caused the reentry capsule to land near the island of
317:
155:
2804:
2793:
2789:
2665:
933:
347:
2955:
Payloads are separated by bullets ( ยท ), launches by pipes ( | ). Crewed flights are indicated in
2602:
528:
1165:
919:
457:
432:
401:
382:
133:
2655:
2650:
2645:
2640:
2635:
2592:
2587:
2582:
2577:
2572:
2567:
2562:
2557:
2552:
2547:
2542:
2537:
2532:
2527:
2522:
2517:
2512:
2507:
2487:
2482:
2477:
2472:
2467:
2462:
2457:
2452:
2447:
2442:
2437:
2427:
2422:
2417:
2412:
2407:
2402:
2397:
2392:
2387:
2382:
2377:
2372:
2367:
2362:
2357:
2352:
2347:
2342:
2337:
2332:
2316:
2311:
2306:
2301:
2296:
2291:
2286:
2281:
2276:
2271:
2266:
2261:
2256:
2251:
2246:
2241:
2236:
2231:
2226:
2221:
2216:
2211:
2188:
2183:
2178:
2173:
2168:
2163:
2158:
2153:
2148:
2143:
2138:
2133:
2128:
2123:
2118:
2108:
2103:
2098:
2093:
2088:
2083:
2078:
2073:
2068:
2063:
2058:
2053:
2048:
2043:
2038:
2033:
2028:
2023:
2018:
2013:
2008:
2003:
1987:
1982:
1977:
1961:
1956:
1951:
1946:
1941:
1936:
1886:
1881:
1876:
1871:
1866:
1861:
1856:
1851:
1846:
1841:
1836:
1831:
1826:
1821:
1816:
1811:
1806:
1790:
1785:
1780:
1775:
1770:
1765:
1760:
1755:
1750:
1745:
1740:
1735:
1730:
1725:
1720:
1715:
1710:
1705:
1700:
1695:
1690:
1685:
1680:
1675:
1670:
1665:
1660:
1655:
1650:
1645:
1640:
1635:
1630:
1625:
1620:
1615:
1610:
1605:
1600:
1595:
1590:
1585:
1580:
1575:
1570:
1565:
1560:
1555:
1550:
1545:
1540:
1535:
1519:
1514:
1509:
1504:
1499:
1494:
1489:
1484:
1479:
1474:
1469:
1464:
1459:
1454:
1449:
1444:
1439:
1434:
1429:
1424:
1419:
1414:
1409:
1404:
1399:
872:
799:
789:
587:
445:
367:
2700:
2695:
2690:
2685:
2432:
840:
2680:
2675:
2670:
1189:
491:
300:
2660:
2597:
577:, whose residents observed both the SRV's fiery descent as well as its colorful parachute.
2877:
542:
310:
480:
The first series of Corona satellites were the
Keyhole 1 (KH-1) satellites based on the
2894:
2863:
2856:
2842:
2757:
745:
722:
469:
357:
87:
2974:
1921:
1916:
1911:
1906:
1394:
1371:
1366:
1361:
1356:
1351:
1346:
1341:
1336:
1331:
1315:
1310:
1305:
1300:
1295:
1290:
1285:
1269:
1264:
1259:
1254:
1150:
1145:
1140:
1135:
1130:
1125:
1120:
1115:
1110:
1105:
1100:
1095:
1090:
1085:
1080:
1075:
1070:
1065:
1060:
1055:
1050:
1045:
1040:
1035:
1030:
1025:
1020:
1015:
1010:
608:
140:
20:
2937:
2932:
2900:
2888:
2870:
2849:
2826:
1249:
1244:
1239:
1234:
1229:
1224:
1005:
1000:
995:
990:
985:
980:
975:
965:
604:
513:
498:
473:
441:
431:
launched on 13 April 1959 at 21:18:39 GMT, the second of three test flights of the
413:
408:
394:
389:
891:
2943:
818:
574:
565:
481:
437:
276:
145:
696:
2927:
2917:
2911:
2883:
2821:
1169:
909:
569:
202:
876:
2831:
803:
545:
could be derived to prevent overexposure in later, photographic missions.
2618:
2113:
1931:
1926:
925:
33:
2746:
2710:
2705:
1181:
2922:
2905:
2816:
2741:
537:
together massed 784 kilograms (1,728 lb) after orbit insertion.
2963:. Payloads deployed from other spacecraft are denoted in (brackets).
607:
and achieved its first fully successful flight with the mission of
603:
CORONA began operational flights on 25 Jun 1959 with the launch of
564:
into a 239 kilometres (149 mi) x 346 kilometres (215 mi)
460:
satellite photo-reconnaissance series of satellites managed by the
2726:
527:
519:
508:
337:
327:
524:
Discoverer 2 environmental chamber inserted into recovery capsule
2761:
1185:
929:
581:
instead, the SRV would be picked up somewhere in "the arctic."
456:"Discoverer" was the civilian designation and cover for the
788:. Washington and London: Smithsonian Institution Press.
784:
Day, Dwayne A.; Logsdon, John M.; Latell, Brian (1998).
472:. The primary goal of the satellites was to replace the
786:
Eye in the Sky: The Story of the Corona Spy
Satellites
165:
784 kilograms (1,728 lb) after orbital insertion
2628:
2611:
2500:
2325:
2204:
2197:
1996:
1970:
1899:
1799:
1528:
1387:
1380:
1324:
1278:
1217:
669:. Central Intelligence Agency. 1995. Archived from
366:
356:
346:
336:
326:
316:
306:
296:
291:
271:
263:
248:
233:
228:
210:
198:
182:
177:
161:
151:
139:
129:
124:
108:
95:
74:
66:
52:
44:
865:A History of Satellite Reconnaissance, Volume 1
716:
714:
560:Launched on 13 April 1959 at 21:18:39 GMT from
2959:. Uncatalogued launch failures are listed in
2773:
1197:
941:
644:. NASA Space Science Data Coordinated Archive
8:
26:
664:"Corona: America's First Satellite Program"
2780:
2766:
2758:
2201:
1384:
1204:
1190:
1182:
948:
934:
926:
86:
32:
25:
636:
634:
632:
630:
628:
626:
624:
620:
779:
777:
775:
773:
771:
769:
767:
765:
763:
7:
2986:Spacecraft which reentered in 1959
871:. National Reconnaissance Office.
14:
462:Advanced Research Projects Agency
16:American reconnaissance satellite
912:
532:Discoverer 2 nosecone attachment
516:with Discoverer 2, 13 April 1959
487:Fairchild Camera and Instrument
98:
1:
862:Robert Perry (October 1973).
342:346 kilometers (215 mi)
332:239 kilometers (149 mi)
2981:Spacecraft launched in 1959
3002:
1163:
18:
2953:
2812:
2719:
1159:
961:
894:. Jonathon's Space Report
821:. Jonathon's Space Report
723:"Discoverer 2, 3, 12, 13"
380:
376:
287:
283:
224:
220:
173:
169:
120:
116:
40:
31:
429:reconnaissance satellite
427:was an American optical
19:Not to be confused with
2737:Enhanced Imaging System
402:Corona KH-1 Test Series
533:
525:
517:
372:13 April 1959 21:21:00
190:1959-04-13UTC21:18:39Z
186:13 April 1959 21:18:39
48:Optical reconnaissance
956:Discoverer satellites
841:"My country and NATO"
748:. Gunter's Space Page
725:. Gunter's Space Page
699:. Gunter's Space Page
531:
523:
512:
466:Department of Defense
297:Reference system
125:Spacecraft properties
2796:Orbital launches in
890:McDowell, Jonathan.
817:McDowell, Jonathan.
562:Vandenberg LC 75-3-4
215:Vandenberg LC 75-3-4
1212:Key Hole satellites
892:"Satellite Catalog"
267:13 April 1959 (SRV)
134:CORONA Test Vehicle
67:Harvard designation
28:
1166:CORONA (satellite)
920:Spaceflight portal
534:
526:
518:
292:Orbital parameters
203:Thor DM-21 Agena-A
2968:
2967:
2755:
2754:
2496:
2495:
1895:
1894:
1179:
1178:
588:Ice Station Zebra
446:Ice Station Zebra
422:
421:
2993:
2843:Unnamed, Unnamed
2801:
2800:
2799:
2782:
2775:
2768:
2759:
2202:
1385:
1206:
1199:
1192:
1183:
950:
943:
936:
927:
922:
917:
916:
915:
904:
903:
901:
899:
887:
881:
880:
870:
859:
853:
852:
850:
848:
837:
831:
830:
828:
826:
814:
808:
807:
781:
758:
757:
755:
753:
741:
735:
734:
732:
730:
718:
709:
708:
706:
704:
692:
686:
685:
683:
681:
676:on June 12, 2007
675:
668:
660:
654:
653:
651:
649:
638:
492:General Electric
328:Perigee altitude
259:
257:
244:
242:
193:
191:
178:Start of mission
109:Mission duration
100:
91:
90:
84:
36:
29:
3001:
3000:
2996:
2995:
2994:
2992:
2991:
2990:
2971:
2970:
2969:
2964:
2949:
2808:
2807:
2797:
2795:
2794:
2792:
2786:
2756:
2751:
2715:
2624:
2607:
2492:
2321:
2193:
1992:
1966:
1891:
1795:
1524:
1376:
1320:
1274:
1213:
1210:
1180:
1175:
1172:
1155:
957:
954:
918:
913:
911:
908:
907:
897:
895:
889:
888:
884:
868:
861:
860:
856:
846:
844:
839:
838:
834:
824:
822:
816:
815:
811:
796:
783:
782:
761:
751:
749:
744:Krebs, Gunter.
743:
742:
738:
728:
726:
721:Krebs, Gunter.
720:
719:
712:
702:
700:
695:Krebs, Gunter.
694:
693:
689:
679:
677:
673:
666:
662:
661:
657:
647:
645:
640:
639:
622:
617:
601:
558:
543:neutral density
507:
454:
418:
417:
411:
404:
399:
398:
392:
385:
338:Apogee altitude
255:
253:
240:
238:
205:
189:
187:
130:Spacecraft type
85:
80:
24:
17:
12:
11:
5:
2999:
2997:
2989:
2988:
2983:
2973:
2972:
2966:
2965:
2954:
2951:
2950:
2948:
2947:
2940:
2935:
2930:
2925:
2920:
2915:
2908:
2903:
2898:
2891:
2886:
2881:
2874:
2867:
2864:Vanguard SLV-6
2860:
2857:Luna E-1A No.1
2853:
2846:
2839:
2834:
2829:
2824:
2819:
2813:
2810:
2809:
2803:
2788:
2787:
2785:
2784:
2777:
2770:
2762:
2753:
2752:
2750:
2749:
2744:
2739:
2734:
2729:
2724:
2720:
2717:
2716:
2714:
2713:
2708:
2703:
2698:
2693:
2688:
2683:
2678:
2673:
2668:
2663:
2658:
2653:
2648:
2643:
2638:
2632:
2630:
2626:
2625:
2623:
2622:
2615:
2613:
2609:
2608:
2606:
2605:
2600:
2595:
2590:
2585:
2580:
2575:
2570:
2565:
2560:
2555:
2550:
2545:
2540:
2535:
2530:
2525:
2520:
2515:
2510:
2504:
2502:
2498:
2497:
2494:
2493:
2491:
2490:
2485:
2480:
2475:
2470:
2465:
2460:
2455:
2450:
2445:
2440:
2435:
2430:
2425:
2420:
2415:
2410:
2405:
2400:
2395:
2390:
2385:
2380:
2375:
2370:
2365:
2360:
2355:
2350:
2345:
2340:
2335:
2329:
2327:
2323:
2322:
2320:
2319:
2314:
2309:
2304:
2299:
2294:
2289:
2284:
2279:
2274:
2269:
2264:
2259:
2254:
2249:
2244:
2239:
2234:
2229:
2224:
2219:
2214:
2208:
2206:
2199:
2195:
2194:
2192:
2191:
2186:
2181:
2176:
2171:
2166:
2161:
2156:
2151:
2146:
2141:
2136:
2131:
2126:
2121:
2116:
2111:
2106:
2101:
2096:
2091:
2086:
2081:
2076:
2071:
2066:
2061:
2056:
2051:
2046:
2041:
2036:
2031:
2026:
2021:
2016:
2011:
2006:
2000:
1998:
1994:
1993:
1991:
1990:
1985:
1980:
1974:
1972:
1968:
1967:
1965:
1964:
1959:
1954:
1949:
1944:
1939:
1934:
1929:
1924:
1919:
1914:
1909:
1903:
1901:
1897:
1896:
1893:
1892:
1890:
1889:
1884:
1879:
1874:
1869:
1864:
1859:
1854:
1849:
1844:
1839:
1834:
1829:
1824:
1819:
1814:
1809:
1803:
1801:
1797:
1796:
1794:
1793:
1788:
1783:
1778:
1773:
1768:
1763:
1758:
1753:
1748:
1743:
1738:
1733:
1728:
1723:
1718:
1713:
1708:
1703:
1698:
1693:
1688:
1683:
1678:
1673:
1668:
1663:
1658:
1653:
1648:
1643:
1638:
1633:
1628:
1623:
1618:
1613:
1608:
1603:
1598:
1593:
1588:
1583:
1578:
1573:
1568:
1563:
1558:
1553:
1548:
1543:
1538:
1532:
1530:
1526:
1525:
1523:
1522:
1517:
1512:
1507:
1502:
1497:
1492:
1487:
1482:
1477:
1472:
1467:
1462:
1457:
1452:
1447:
1442:
1437:
1432:
1427:
1422:
1417:
1412:
1407:
1402:
1397:
1391:
1389:
1382:
1378:
1377:
1375:
1374:
1369:
1364:
1359:
1354:
1349:
1344:
1339:
1334:
1328:
1326:
1325:KH-3 Corona'''
1322:
1321:
1319:
1318:
1313:
1308:
1303:
1298:
1293:
1288:
1282:
1280:
1276:
1275:
1273:
1272:
1267:
1262:
1257:
1252:
1247:
1242:
1237:
1232:
1227:
1221:
1219:
1215:
1214:
1211:
1209:
1208:
1201:
1194:
1186:
1177:
1176:
1174:
1173:
1160:
1157:
1156:
1154:
1153:
1148:
1143:
1138:
1133:
1128:
1123:
1118:
1113:
1108:
1103:
1098:
1093:
1088:
1083:
1078:
1073:
1068:
1063:
1058:
1053:
1048:
1043:
1038:
1033:
1028:
1023:
1018:
1013:
1008:
1003:
998:
993:
988:
983:
978:
973:
968:
962:
959:
958:
955:
953:
952:
945:
938:
930:
924:
923:
906:
905:
882:
854:
832:
809:
794:
759:
746:"Discoverer 1"
736:
710:
687:
655:
642:"Discoverer 1"
619:
618:
616:
613:
600:
597:
557:
554:
506:
503:
470:U.S. Air Force
453:
450:
420:
419:
412:
406:
405:
400:
393:
387:
386:
381:
378:
377:
374:
373:
370:
364:
363:
360:
354:
353:
350:
344:
343:
340:
334:
333:
330:
324:
323:
320:
314:
313:
308:
304:
303:
298:
294:
293:
289:
288:
285:
284:
281:
280:
273:
269:
268:
265:
261:
260:
250:
246:
245:
235:
231:
230:
229:End of mission
226:
225:
222:
221:
218:
217:
212:
208:
207:
200:
196:
195:
184:
180:
179:
175:
174:
171:
170:
167:
166:
163:
159:
158:
153:
149:
148:
143:
137:
136:
131:
127:
126:
122:
121:
118:
117:
114:
113:
110:
106:
105:
102:
93:
92:
78:
72:
71:
68:
64:
63:
54:
50:
49:
46:
42:
41:
38:
37:
15:
13:
10:
9:
6:
4:
3:
2:
2998:
2987:
2984:
2982:
2979:
2978:
2976:
2962:
2958:
2952:
2946:
2945:
2941:
2939:
2936:
2934:
2931:
2929:
2926:
2924:
2921:
2919:
2916:
2914:
2913:
2909:
2907:
2904:
2902:
2899:
2897:
2896:
2892:
2890:
2887:
2885:
2882:
2880:
2879:
2875:
2873:
2872:
2868:
2866:
2865:
2861:
2859:
2858:
2854:
2852:
2851:
2847:
2845:
2844:
2840:
2838:
2835:
2833:
2830:
2828:
2825:
2823:
2820:
2818:
2815:
2814:
2811:
2806:
2802:
2791:
2783:
2778:
2776:
2771:
2769:
2764:
2763:
2760:
2748:
2745:
2743:
2740:
2738:
2735:
2733:
2730:
2728:
2725:
2722:
2721:
2718:
2712:
2709:
2707:
2704:
2702:
2699:
2697:
2694:
2692:
2689:
2687:
2684:
2682:
2679:
2677:
2674:
2672:
2669:
2667:
2664:
2662:
2659:
2657:
2654:
2652:
2649:
2647:
2644:
2642:
2639:
2637:
2634:
2633:
2631:
2629:KH-11 Crystal
2627:
2620:
2617:
2616:
2614:
2610:
2604:
2601:
2599:
2596:
2594:
2591:
2589:
2586:
2584:
2581:
2579:
2576:
2574:
2571:
2569:
2566:
2564:
2561:
2559:
2556:
2554:
2551:
2549:
2546:
2544:
2541:
2539:
2536:
2534:
2531:
2529:
2526:
2524:
2521:
2519:
2516:
2514:
2511:
2509:
2506:
2505:
2503:
2499:
2489:
2486:
2484:
2481:
2479:
2476:
2474:
2471:
2469:
2466:
2464:
2461:
2459:
2456:
2454:
2451:
2449:
2446:
2444:
2441:
2439:
2436:
2434:
2431:
2429:
2426:
2424:
2421:
2419:
2416:
2414:
2411:
2409:
2406:
2404:
2401:
2399:
2396:
2394:
2391:
2389:
2386:
2384:
2381:
2379:
2376:
2374:
2371:
2369:
2366:
2364:
2361:
2359:
2356:
2354:
2351:
2349:
2346:
2344:
2341:
2339:
2336:
2334:
2331:
2330:
2328:
2324:
2318:
2315:
2313:
2310:
2308:
2305:
2303:
2300:
2298:
2295:
2293:
2290:
2288:
2285:
2283:
2280:
2278:
2275:
2273:
2270:
2268:
2265:
2263:
2260:
2258:
2255:
2253:
2250:
2248:
2245:
2243:
2240:
2238:
2235:
2233:
2230:
2228:
2225:
2223:
2220:
2218:
2215:
2213:
2210:
2209:
2207:
2203:
2200:
2196:
2190:
2187:
2185:
2182:
2180:
2177:
2175:
2172:
2170:
2167:
2165:
2162:
2160:
2157:
2155:
2152:
2150:
2147:
2145:
2142:
2140:
2137:
2135:
2132:
2130:
2127:
2125:
2122:
2120:
2117:
2115:
2112:
2110:
2107:
2105:
2102:
2100:
2097:
2095:
2092:
2090:
2087:
2085:
2082:
2080:
2077:
2075:
2072:
2070:
2067:
2065:
2062:
2060:
2057:
2055:
2052:
2050:
2047:
2045:
2042:
2040:
2037:
2035:
2032:
2030:
2027:
2025:
2022:
2020:
2017:
2015:
2012:
2010:
2007:
2005:
2002:
2001:
1999:
1995:
1989:
1986:
1984:
1981:
1979:
1976:
1975:
1973:
1969:
1963:
1960:
1958:
1955:
1953:
1950:
1948:
1945:
1943:
1940:
1938:
1935:
1933:
1930:
1928:
1925:
1923:
1922:Discoverer 27
1920:
1918:
1917:Discoverer 24
1915:
1913:
1912:Discoverer 23
1910:
1908:
1907:Discoverer 20
1905:
1904:
1902:
1898:
1888:
1885:
1883:
1880:
1878:
1875:
1873:
1870:
1868:
1865:
1863:
1860:
1858:
1855:
1853:
1850:
1848:
1845:
1843:
1840:
1838:
1835:
1833:
1830:
1828:
1825:
1823:
1820:
1818:
1815:
1813:
1810:
1808:
1805:
1804:
1802:
1798:
1792:
1789:
1787:
1784:
1782:
1779:
1777:
1774:
1772:
1769:
1767:
1764:
1762:
1759:
1757:
1754:
1752:
1749:
1747:
1744:
1742:
1739:
1737:
1734:
1732:
1729:
1727:
1724:
1722:
1719:
1717:
1714:
1712:
1709:
1707:
1704:
1702:
1699:
1697:
1694:
1692:
1689:
1687:
1684:
1682:
1679:
1677:
1674:
1672:
1669:
1667:
1664:
1662:
1659:
1657:
1654:
1652:
1649:
1647:
1644:
1642:
1639:
1637:
1634:
1632:
1629:
1627:
1624:
1622:
1619:
1617:
1614:
1612:
1609:
1607:
1604:
1602:
1599:
1597:
1594:
1592:
1589:
1587:
1584:
1582:
1579:
1577:
1574:
1572:
1569:
1567:
1564:
1562:
1559:
1557:
1554:
1552:
1549:
1547:
1544:
1542:
1539:
1537:
1534:
1533:
1531:
1527:
1521:
1518:
1516:
1513:
1511:
1508:
1506:
1503:
1501:
1498:
1496:
1493:
1491:
1488:
1486:
1483:
1481:
1478:
1476:
1473:
1471:
1468:
1466:
1463:
1461:
1458:
1456:
1453:
1451:
1448:
1446:
1443:
1441:
1438:
1436:
1433:
1431:
1428:
1426:
1423:
1421:
1418:
1416:
1413:
1411:
1408:
1406:
1403:
1401:
1398:
1396:
1395:Discoverer 38
1393:
1392:
1390:
1386:
1383:
1381:KH-4 Corona-M
1379:
1373:
1372:Discoverer 37
1370:
1368:
1367:Discoverer 36
1365:
1363:
1362:Discoverer 35
1360:
1358:
1357:Discoverer 34
1355:
1353:
1352:Discoverer 33
1350:
1348:
1347:Discoverer 32
1345:
1343:
1342:Discoverer 31
1340:
1338:
1337:Discoverer 30
1335:
1333:
1332:Discoverer 29
1330:
1329:
1327:
1323:
1317:
1316:Discoverer 28
1314:
1312:
1311:Discoverer 26
1309:
1307:
1306:Discoverer 25
1304:
1302:
1301:Discoverer 22
1299:
1297:
1296:Discoverer 18
1294:
1292:
1291:Discoverer 17
1289:
1287:
1286:Discoverer 16
1284:
1283:
1281:
1277:
1271:
1270:Discoverer 15
1268:
1266:
1265:Discoverer 14
1263:
1261:
1260:Discoverer 11
1258:
1256:
1255:Discoverer 10
1253:
1251:
1248:
1246:
1243:
1241:
1238:
1236:
1233:
1231:
1228:
1226:
1223:
1222:
1220:
1216:
1207:
1202:
1200:
1195:
1193:
1188:
1187:
1184:
1171:
1167:
1162:
1161:
1158:
1152:
1149:
1147:
1144:
1142:
1139:
1137:
1134:
1132:
1129:
1127:
1124:
1122:
1119:
1117:
1114:
1112:
1109:
1107:
1104:
1102:
1099:
1097:
1094:
1092:
1089:
1087:
1084:
1082:
1079:
1077:
1074:
1072:
1069:
1067:
1064:
1062:
1059:
1057:
1054:
1052:
1049:
1047:
1044:
1042:
1039:
1037:
1034:
1032:
1029:
1027:
1024:
1022:
1019:
1017:
1014:
1012:
1009:
1007:
1004:
1002:
999:
997:
994:
992:
989:
987:
984:
982:
979:
977:
974:
972:
969:
967:
964:
963:
960:
951:
946:
944:
939:
937:
932:
931:
928:
921:
910:
893:
886:
883:
878:
874:
867:
866:
858:
855:
842:
836:
833:
820:
813:
810:
805:
801:
797:
795:1-56098-830-4
791:
787:
780:
778:
776:
774:
772:
770:
768:
766:
764:
760:
747:
740:
737:
724:
717:
715:
711:
698:
697:"KH-1 Corona"
691:
688:
672:
665:
659:
656:
643:
637:
635:
633:
631:
629:
627:
625:
621:
614:
612:
610:
609:Discoverer 14
606:
598:
596:
592:
590:
589:
582:
578:
576:
571:
567:
563:
555:
553:
549:
546:
544:
538:
530:
522:
515:
511:
504:
502:
500:
495:
493:
488:
483:
478:
475:
471:
467:
463:
459:
451:
449:
447:
443:
439:
434:
430:
426:
416: →
415:
410:
407:←
403:
397: →
396:
391:
388:←
384:
379:
375:
371:
369:
365:
362:90.40 minutes
361:
359:
355:
351:
349:
345:
341:
339:
335:
331:
329:
325:
321:
319:
315:
312:
309:
305:
302:
299:
295:
290:
286:
282:
278:
274:
270:
266:
262:
252:26 April 1959
251:
247:
237:14 April 1959
236:
232:
227:
223:
219:
216:
213:
209:
204:
201:
197:
185:
181:
176:
172:
168:
164:
160:
157:
154:
150:
147:
144:
142:
138:
135:
132:
128:
123:
119:
115:
111:
107:
103:
101:
94:
89:
83:
79:
77:
73:
69:
65:
62:
58:
55:
51:
47:
43:
39:
35:
30:
22:
21:Discoverer II
2960:
2956:
2942:
2938:Discoverer 8
2933:Discoverer 7
2910:
2901:Discoverer 6
2893:
2889:Discoverer 5
2878:Explorer S-1
2876:
2871:Discoverer 4
2869:
2862:
2855:
2850:Discoverer 3
2848:
2841:
2837:Discoverer 2
2836:
2827:Discoverer 1
2612:KH-10 Dorian
2501:KH-9 Hexagon
1971:KH-6 Lanyard
1279:KH-2 Corona'
1250:Discoverer 9
1245:Discoverer 8
1240:Discoverer 7
1235:Discoverer 6
1230:Discoverer 5
1225:Discoverer 4
970:
896:. Retrieved
885:
864:
857:
845:. Retrieved
835:
823:. Retrieved
819:"Launch Log"
812:
785:
750:. Retrieved
739:
727:. Retrieved
701:. Retrieved
690:
678:. Retrieved
671:the original
658:
646:. Retrieved
605:Discoverer 4
602:
593:
586:
583:
579:
570:Thor-Agena A
559:
550:
547:
539:
535:
514:Thor Agena A
499:Discoverer 1
496:
479:
474:U-2 spyplane
455:
442:Soviet Union
425:Discoverer 2
424:
423:
414:Discoverer 3
409:Discoverer 1
395:Discoverer 3
390:Discoverer 1
318:Eccentricity
272:Landing site
264:Landing date
234:Last contact
152:Manufacturer
57:US Air Force
45:Mission type
27:Discoverer 2
2944:Pioneer P-3
2198:KH-8 Gambit
1997:KH-7 Gambit
1218:KH-1 Corona
575:Spitsbergen
566:polar orbit
438:Spitzbergen
433:Corona KH-1
348:Inclination
277:Spitzbergen
211:Launch site
183:Launch date
162:Launch mass
2975:Categories
2928:Explorer 7
2918:Vanguard 3
2912:Transit 1A
2884:Explorer 6
2822:Vanguard 2
1900:KH-5 Argon
1170:KH-5 Argon
1164:See also:
847:25 October
825:24 October
752:24 October
729:24 October
703:7 November
680:25 January
648:24 October
615:References
505:Spacecraft
452:Background
383:Discoverer
301:Geocentric
256:1959-04-27
249:Decay date
241:1959-04-15
206:(Thor 170)
2957:underline
2832:Pioneer 4
877:794229594
311:Low Earth
194: GMT
82:1959-003A
76:COSPAR ID
2895:Beacon 2
2723:See also
2656:OPS 9627
2651:OPS 3984
2646:OPS 2581
2641:OPS 4515
2636:OPS 5705
2621:(mockup)
2619:OPS 0855
2593:OPS 0721
2588:OPS 5642
2583:OPS 3123
2578:OPS 3854
2573:OPS 0460
2568:OPS 4800
2563:OPS 4699
2558:OPS 4428
2553:OPS 6381
2548:OPS 7122
2543:OPS 6245
2538:OPS 6630
2533:OPS 8261
2528:OPS 8410
2523:OPS 8314
2518:OPS 7293
2513:OPS 1737
2508:OPS 7809
2488:OPS 8424
2483:OPS 2925
2478:OPS 2849
2473:OPS 1166
2468:OPS 7164
2463:OPS 7471
2458:OPS 4915
2453:OPS 8533
2448:OPS 7600
2443:OPS 5499
2438:OPS 4883
2428:OPS 1776
2423:OPS 6889
2418:OPS 6275
2413:OPS 4018
2408:OPS 2093
2403:OPS 3978
2398:OPS 8888
2393:OPS 6574
2388:OPS 1678
2383:OPS 7616
2378:OPS 8607
2373:OPS 7899
2368:OPS 7776
2363:OPS 7568
2358:OPS 7874
2353:OPS 6820
2348:OPS 2863
2343:OPS 6531
2338:OPS 8455
2333:OPS 7807
2317:OPS 1077
2312:OPS 5310
2307:OPS 4248
2302:OPS 7585
2297:OPS 6518
2292:OPS 5296
2287:OPS 5247
2282:OPS 5187
2277:OPS 5138
2272:OPS 5105
2267:OPS 5057
2262:OPS 5028
2257:OPS 5000
2252:OPS 4995
2247:OPS 4941
2242:OPS 4886
2237:OPS 4282
2232:OPS 4243
2227:OPS 4204
2222:OPS 8968
2217:OPS 4096
2212:OPS 3401
2189:OPS 4360
2184:OPS 4321
2179:OPS 4399
2174:OPS 1890
2169:OPS 2070
2164:OPS 2055
2159:OPS 1686
2154:OPS 1832
2149:OPS 1850
2144:OPS 1577
2139:OPS 1950
2134:OPS 0910
2129:OPS 0879
2124:OPS 1184
2119:OPS 7253
2114:OPS 6232
2109:OPS 7208
2104:OPS 5698
2099:OPS 5810
2094:OPS 5501
2089:OPS 5236
2084:OPS 4983
2079:OPS 4920
2074:OPS 4703
2069:OPS 4439
2064:OPS 4384
2059:OPS 4036
2054:OPS 4262
2049:OPS 3802
2044:OPS 3684
2039:OPS 3592
2034:OPS 3743
2029:OPS 3435
2024:OPS 2423
2019:OPS 2372
2014:OPS 2196
2009:OPS 1947
2004:OPS 1467
1988:OPS 1370
1983:OPS 0924
1978:OPS 0627
1962:OPS 3236
1957:OPS 2739
1952:OPS 2437
1947:OPS 1561
1942:OPS 1008
1937:FTV-1134
1932:FTV-1132
1927:FTV-1126
1887:OPS 6371
1882:OPS 5640
1877:OPS 5454
1872:OPS 5300
1867:OPS 3297
1862:OPS 4992
1857:OPS 4324
1852:OPS 4720
1847:OPS 0440
1842:OPS 6617
1837:OPS 3654
1832:OPS 3890
1827:OPS 1315
1822:OPS 5955
1817:OPS 1419
1812:OPS 1001
1807:OPS 5089
1791:OPS 3531
1786:OPS 1101
1781:OPS 3722
1776:OPS 4740
1771:OPS 0165
1766:OPS 5343
1761:OPS 4849
1756:OPS 2243
1751:OPS 0562
1746:OPS 4827
1741:OPS 3559
1736:OPS 4696
1731:OPS 4779
1726:OPS 4750
1721:OPS 1664
1716:OPS 1866
1711:OPS 1545
1706:OPS 1703
1701:OPS 1599
1696:OPS 1778
1691:OPS 1508
1686:OPS 1612
1681:OPS 3488
1676:OPS 7291
1671:OPS 4639
1666:OPS 7249
1661:OPS 2155
1656:OPS 5325
1651:OPS 7221
1646:OPS 7208
1641:OPS 5543
1636:OPS 8431
1631:OPS 8425
1626:OPS 5023
1621:OPS 4803
1616:OPS 4782
1611:OPS 3928
1606:OPS 3358
1601:OPS 3360
1596:OPS 5434
1591:OPS 3559
1586:OPS 3333
1581:OPS 3497
1576:OPS 3042
1571:OPS 3491
1566:OPS 3754
1561:OPS 3483
1556:OPS 2921
1551:OPS 3444
1546:OPS 3467
1541:OPS 1353
1536:OPS 1419
1520:OPS 1388
1515:OPS 2260
1510:OPS 2268
1505:OPS 1266
1500:OPS 0999
1495:OPS 0954
1490:OPS 0720
1485:OPS 0583
1480:OPS 0048
1475:FTV-1156
1470:FTV-1155
1465:FTV-1135
1460:FTV-1136
1455:FTV-1154
1450:FTV-1153
1445:FTV-1133
1440:FTV-1152
1435:FTV-1131
1430:FTV-1130
1425:FTV-1151
1420:FTV-1129
1415:FTV-1127
1410:FTV-1128
1405:FTV-1125
1400:FTV-1124
804:36783934
468:and the
156:Lockheed
70:1959 GAM
53:Operator
2961:italics
2747:USA-144
2711:USA-245
2706:USA-224
2701:USA-186
2696:USA-161
2691:USA-129
2686:USA-116
2433:OPS 304
898:9 April
556:Mission
482:Agena-A
464:of the
322:0.00801
254: (
239: (
188: (
146:Agena-A
97:SATCAT
2923:Luna 3
2906:Luna 2
2817:Mechta
2805:1960 โ
2790:โ 1958
2742:USA-53
2681:USA-86
2676:USA-33
2671:USA-27
875:
843:. NATO
802:
792:
599:Legacy
458:Corona
358:Period
307:Regime
199:Rocket
104:S00014
2732:Misty
2727:KH-12
2666:#2101
2661:USA-6
2603:#1220
2598:USA-2
2326:KH-8A
1800:KH-4B
1529:KH-4A
869:(PDF)
674:(PDF)
667:(PDF)
568:by a
368:Epoch
352:89.9ยฐ
279:(SRV)
275:Over
112:1 day
2798:1959
2205:KH-8
1388:KH-4
1168:and
900:2020
873:OCLC
849:2020
827:2020
800:OCLC
790:ISBN
754:2020
731:2020
705:2020
682:2020
650:2020
141:Bus
99:no.
61:NRO
2977::
1151:38
1146:37
1141:36
1136:35
1131:34
1126:33
1121:32
1116:31
1111:30
1106:29
1101:28
1096:27
1091:26
1086:25
1081:24
1076:23
1071:22
1066:21
1061:20
1056:19
1051:18
1046:17
1041:16
1036:15
1031:14
1026:13
1021:12
1016:11
1011:10
798:.
762:^
713:^
623:^
591:.
448:.
59:/
2781:e
2774:t
2767:v
1205:e
1198:t
1191:v
1006:9
1001:8
996:7
991:6
986:5
981:4
976:3
971:2
966:1
949:e
942:t
935:v
902:.
879:.
851:.
829:.
806:.
756:.
733:.
707:.
684:.
652:.
258:)
243:)
192:)
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.