Let's look at some of the successful 13's<br /><br />13th shuttle mission<br />Soyuz 5 (13th Soviet space mission)<br />Gemini 10 (13th US space mission)<br />Soyuz 13<br />Soyuz T13<br />Soyuz TM13<br />Progress 13<br />Progress M13<br />Explorer 13<br />Discoverer 13<br />Venera 13<br />Cosmos 13<br />Pioneer 13<br /><br />Multiples or combinations of 13<br /><br />STS 113<br />STS 26, 39, 52, 65, 78, 91, 104<br />Soyuz 26, 39<br />Progress 26, 39<br />Progress M 26, 39, 52<br />Cosmos 26, 39, 52, 65, 78, 91, 113, 117, 130 etc. <br />Explorer 26, 39, 54<br /><br />Successful satellite launches on 13th day of the month.<br /><br />Jan Cosmos 984, 1071, 1532, Molniya 1-85, STS-54, ICESat, CHIPSat<br /><br />Feb OPS-6889, Cosmos 1077, 1245<br /><br />Mar OPS-5057, Cosmos 325, 1827, 1828, 1829, 1830, 1831, 1832, Explorer 43, Soyuz T-15, STS 29, USA-101, 102<br /><br />April Transit 1B, Cosmos 14, Canyon 2, Westar-1, Cosmos 814, FB-1, Cosmos 2072, Palapa B2R, ASC-2, GEOS 8<br /><br />May Cosmos 281, 1844, 1945, Comstar 1, Navstar 2, Progress 6, 36, Soyuz T5, USA-91, NOAA 15, Hellas Sat 2, Spaceship One flight 14P<br /><br />June KH-5 9065A, IDCSP 4-1, 2, 3, 4, 5, 6, 7, 8, Cosmos 348, 659, 1659, Intelsat 4 F5, USA-1<br /><br />Jul Cosmos 502, 928, 1115, 1387, 1482, 2197, 2198, 2199, 2200, 2201, 2202, KH 9-6, STS 70, <br /><br />Aug Dodecapole 2, Transit 5b-7, Tempsat 1, Longrod, Calsphere 4A, SURCAL 5, Cosmos 292, 754, 1246, Explorer 46, Optus 1B, Soyuz TM28, Scisat 1<br /><br />Sept Mercury MA-4,Cosmos 45, 950, 951, 1587, 1598, 2155<br /><br />Oct Exploer 7, Discoverer 32, Soyuz 8, Cosmos 44, 45, 46, 47, 48, 49, 50, 51, 1315, 1976, 2374, 2375, 2376, Molniya 3-10, Tiros N, Ekspress, <br /><br />Nov Cosmos 253, 1319, 1702, 1791, 1792, HEAO 2, USA 65, Arabsat 2B, Measat 2, GE 4, <br /><br />Dec Black Sphere, ***** 3, Surcal 1a, 2a, Calsphere 1a, Relay 1, Cosmos 23, 615, 697, 967, 1708, Pioneer 8, TTS 1, DSCS II-03, 04, Satcom 1, SDS 4, USA 13 (double 13!), 14, <br /><br />Some 13-related failures:<br /><br />Cosmos 104 (mu <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em> Arthur Clarke</p> </div>