I’ve crunched some more precise numbers for this evening’s ISS and STS-133 passes. The times are in UTC, so you need to subtract 5 hours for Eastern Standard time. (Click here to download them in a text file.)

Ottawa-To-ISS
Time (UTCG)                Azimuth (deg)    Elevation (deg)    Range (km)
-----------------------    -------------    ---------------    -----------
9 Mar 2011 00:20:38.123              292                  0    2159.492211
9 Mar 2011 00:21:38.000              287                  4    1765.477591
9 Mar 2011 00:22:38.000              280                  9    1389.558028
9 Mar 2011 00:23:38.000              267                 15    1055.451478
9 Mar 2011 00:24:38.000              244                 22     818.373598
9 Mar 2011 00:25:38.000              209                 24     774.603489
9 Mar 2011 00:26:38.000              180                 18     951.326850
9 Mar 2011 00:27:38.000              164                 11    1258.305207
9 Mar 2011 00:28:38.000              156                  6    1622.294953
9 Mar 2011 00:29:38.000              150                  1    2011.420073
9 Mar 2011 00:29:58.922              149                  0    2150.274764

Ottawa-To-STS-133
Time (UTCG)                Azimuth (deg)    Elevation (deg)     Range (km)
-----------------------    -------------    ---------------    -----------
9 Mar 2011 00:20:05.553              292                  0    2159.008371
9 Mar 2011 00:21:05.000              287                  4    1767.294751
9 Mar 2011 00:22:05.000              280                  9    1390.441394
9 Mar 2011 00:23:05.000              268                 15    1054.707599
9 Mar 2011 00:24:05.000              244                 23     814.906252
9 Mar 2011 00:25:05.000              209                 24     768.231806
9 Mar 2011 00:26:05.000              180                 18     943.899552
9 Mar 2011 00:27:05.000              164                 11    1250.970718
9 Mar 2011 00:28:05.000              155                  6    1615.247805
9 Mar 2011 00:29:05.000              150                  1    2004.620053
9 Mar 2011 00:29:27.464              149                  0    2153.829615

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The International Space Station and the Space Shuttle Discovery will be passing over Ottawa the next couple of days and, weather-permitting, there should be a couple of opportunities to see them as they pass overhead.

You won’t need any fancy equipment to view them. They’ll look like a pair of bright dots, one chasing the other across the sky. According to the Heavens Above website, there are three passes between now and Thursday evening that should be visible from Ottawa.
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