The following results were computed June 3, using the TLE posted earlier by the MCC: 1 25544U 98067A 04159.51932743 .00020000 00000-0 20000-3 0 9046 2 25544 51.6325 15.0272 0005564 207.3287 152.7581 15.68778822501504 These results therefore supersede the results posted earlier: http://www.satobs.org/seesat/Jun-2004/0021.html An elevation of 0 meters (above the WGS84 ellipsoid) was used in all cases. When I checked my result for "Contact 2" against CalSKY (which evidently also had updated to the new TLE), I got reasonable agreement: Tuesday 8 June 2004 Observer Site User Site, Kazakhstan WGS84: Lon: +80d42m48.6s Lat: +45d48m23.4s Alt: 735m All times in ALMT or ALMST (during summer) 12h32m55.01s ISS May cross the disk of Venus. Separation: 0.02d Position Angle: 202.9d Angular Velocity: 63.1'/s Angular diameter: 45.2" size: 73.0m x 44.5m x 27.5m Satellite at az: 145.1d SE h: 63.5d dist: 409.7 km mag=10.6m Satellite apparently moves to direction 292.9° Centerline, Closest Point Map: Lon:+80d42m52s E Lat: +45d48m19s dist: 0.15 km az: 148.0d SSE Path direction: 58.0d ENE ground speed: 7.394 km/s width: 0.3 km max. duration: 0.0 s CalSKY used an elevation of 735 meters for its computation, so some disparity is to be expected. A - seconds elapsed since "Contact 1," at 5:13:29 UTC B - UTC time (June 8) C - elevation angle of the ISS/Venus D - azimuth angle of the ISS ( + is East from North; - is W from N) E - range (miles) F - latitude for observing the transit G - longitude H - sun elevation angle I - sun/Venus separation angle A---- B------ C--- D----- E--- F------- G-------- H---- I---- ORBIT 1: The ISS is first seen transiting Venus as Venus transits the Sun 142 5:15:51 1.6 66.6 1276 -10.4759 16.9119 1.5 0.3 Contact 2; also represents (to 0.1°) nearly the highest elevation for any ISS transit of Venus 1166 5:32:55 63.5 144.9 255 45.8065 80.7135 63.9 0.2 1407 5:36:56 60.0 -165.9 263 52.1987 103.2916 60.3 0.2 1535 5:39:04 55.0 -142.5 277 53.4533 117.3412 55.2 0.2 1639 5:40:48 50.0 -125.9 294 53.1807 129.0889 50.1 0.2 1731 5:42:20 45.0 -112.9 316 51.9713 139.2254 45.1 0.2 1817 5:43:46 40.0 -102.4 343 50.0723 148.1950 40.0 0.2 1898 5:45:07 35.0 -93.8 379 47.6688 156.0884 35.0 0.2 1974 5:46:23 30.0 -86.8 424 44.9204 163.0264 29.9 0.2 2045 5:47:34 25.0 -81.0 484 41.9399 169.2094 24.9 0.2 2111 5:48:40 20.0 -76.3 566 38.7839 174.8974 19.8 0.2 2168 5:49:37 15.0 -72.4 679 35.6576 -179.9078 14.8 0.2 2214 5:50:23 10.0 -69.2 839 32.6241 -174.9213 9.7 0.2 2244 5:50:53 5.1 -66.5 1060 29.8724 -170.0536 4.7 0.2 2255 5:51:04 0.8 -64.3 1332 27.6486 -165.5122 0.2 0.2 ORBIT 3: 11158 8:19:27 1.7 66.6 1268 -9.9386 -29.3096 1 1.4 0.2 11168 8:19:37 5.1 66.2 1060 -8.2056 -26.1428 5.0 0.2 Greatest transit of Venus 11175 8:19:44 6.6 66.0 987 -7.4077 -24.9074 6.5 0.2 11197 8:20:06 9.9 65.8 844 -5.3886 -22.1761 9.9 0.2 11243 8:20:52 15.0 65.9 681 -1.9581 -18.3208 14.9 0.2 11300 8:21:49 20.0 66.4 566 1.7868 -14.7088 20.0 0.2 11365 8:22:54 25.0 67.6 484 5.7696 -11.2087 25.0 0.2 11435 8:24:04 30.0 69.3 423 9.8727 -7.7713 29.9 0.2 11511 8:25:20 35.0 71.9 377 14.1823 -4.2041 35.0 0.2 11592 8:26:41 40.0 75.5 341 18.6433 -0.4391 40.0 0.2 11677 8:28:06 45.0 80.3 314 23.1880 3.5920 45.0 0.2 11771 8:29:40 50.0 87.2 292 28.0425 8.2704 50.1 0.2 11875 8:31:24 55.0 97.2 275 33.1708 13.8707 55.1 0.2 12006 8:33:35 60.0 114.2 262 39.1723 21.8322 60.2 0.2 12211 8:37:00 63.4 151.4 255 47.0910 37.1542 63.7 0.2 13269 8:54:38 1.3 -64.7 1292 27.6285 147.5808 1.0 0.2 ORBIT 4: 16666 9:51:15 1.8 66.7 1264 -9.6687 -52.4188 1 1.4 0.2 16675 9:51:24 4.9 66.2 1072 -8.0826 -49.5034 4.7 0.2 16705 9:51:54 9.9 65.9 843 -5.1438 -45.3387 9.8 0.2 16751 9:52:40 15.0 66.0 681 -1.7164 -41.4878 14.8 0.2 16808 9:53:37 20.0 66.5 566 2.0262 -37.8771 19.9 0.2 16873 9:54:42 25.0 67.7 484 6.0068 -34.3761 24.9 0.2 16944 9:55:53 30.0 69.5 423 10.1651 -30.8877 29.9 0.2 17020 9:57:09 35.0 72.1 377 14.4701 -27.3162 34.9 0.2 17101 9:58:30 40.0 75.7 341 18.9256 -23.5424 39.9 0.2 17186 9:59:55 45.0 80.6 314 23.4635 -19.4978 44.9 0.2 17280 10:01:29 50.0 87.5 292 28.3089 -14.7991 50.0 0.2 17385 10:03:14 55.0 97.7 275 33.4718 -9.1123 55.1 0.2 17517 10:05:26 60.0 115.0 262 39.4894 -1.0263 60.1 0.2 17718 10:08:47 63.2 151.5 256 47.2014 14.0971 63.6 0.2 17920 10:12:09 60.0 -167.2 263 52.2400 33.4711 60.4 0.2 18052 10:14:21 55.0 -142.9 277 53.4842 47.9794 55.4 0.2 18157 10:16:06 50.0 -126.0 294 53.1405 59.8286 50.4 0.2 18251 10:17:40 45.0 -112.8 316 51.8333 70.1361 45.3 0.2 18338 10:19:07 40.0 -102.1 344 49.8421 79.1318 40.2 0.2 18419 10:20:28 35.0 -93.6 379 47.3803 86.9387 35.2 0.2 18495 10:21:44 30.0 -86.7 424 44.5872 93.7938 30.2 0.2 18567 10:22:56 25.0 -80.9 484 41.5286 99.9856 25.1 0.2 18632 10:24:01 20.0 -76.3 565 38.3956 105.5198 20.2 0.2 18690 10:24:59 15.0 -72.5 679 35.1999 110.7449 15.1 0.2 18736 10:25:45 10.0 -69.3 839 32.1578 115.6863 10.0 0.2 18766 10:26:15 5.1 -66.7 1060 29.4103 120.5129 5.0 0.2 Lowest elevation at which my program "sees" a transit 18777 10:26:26 0.6 -64.4 1346 27.1057 125.2456 0.3 0.2 Contact 4, on ORBIT 5: 22350 11:25:59 22.7 67.2 519 4.3736 -59.1608 22.4 0.3 ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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