As the story below indicates, there are several good chances to see the ISS
(International Space Station) with nothing but the unaided eye as it passes over
the St. Louis area, sometimes twice an evening;

http://science.nasa.gov/headlines/y2009/03jul_sightings.htm

Space Station Marathon 07.03.2009

July 3, 2009: If you've never seen a spaceship with your own eyes, now's your
chance.

The International Space Station (ISS) is about to make a remarkable series of
flybys over the United States. Beginning this 4th of July weekend, the station
will appear once, twice, and sometimes three times a day for many days in a row.
No matter where you live, you should have at least a few opportunities to see
the biggest spaceship ever built.

-----------------

There are particularly good passes on these dates:

July 7 22:05 CDST
July 8 20:54 CDST
July 9 21:21 CDST
July 11 20:35 CDST

Details in the table below is from heavens-above.com which generates satellite
visibility predictions based on location.

Explanation:

1st column is date of the pass

2nd column (mag) is brightness of the object in astronomical magnitudes (6 being
the dimmest the unaided eye can usually see, 1 being roughly the brightness of
bright stars, -2 being the brightness of the brightest planets such as Jupiter &
Venus)

3rd column is when the ISS first becomes visible (local time)

4th column (Alt) is the altitude in degrees above the horizon when it becomes
visible

5th column (Az) is the direction in azimuth it will be seen (N, E, W, S, etc)

6th column (Max Alt Time) is the time when it is at it's highest above the local
horizon

7th column (Alt) is the altitude in degrees above the horizon when it's at it's
highest above the local horizon

8th column (Az) is the direction in azimuth it will be seen (N, E, W, S, etc)
when it's at it's highest above the local horizon

9th column ( End Time) is when it disappears from view as it either goes below
the horizon or passes into the earth's shadow

10th column (Alt) s the altitude in degrees above the horizon when it disappears

11th column (Az) is the direction in azimuth it will be seen (N, E, W, S, etc)
when it disappears


http://www.heavens-above.com/PassSummary.aspx?satid=25544&lat=38.627&lng=-90.198\
&loc=Saint+Louis&alt=135&tz=CST

OR http://tinyurl.com/5aahtd

Date mag Start time Alt Az Max Alt Time Alt Az
End time Alt Az
6 Jul -0.5 23:16:45 10 W 23:19:04 21 NNW
23:21:23 10 NNE
7 Jul -2.5 22:05:20 10 WSW 22:08:10 54 NW
22:11:06 10 NE
7 Jul 0.5 23:43:02 10 NW 23:43:58 11 NNW
23:44:52 10 N
8 Jul -2.9 20:54:48 10 SSW 20:57:34 39 SE
21:00:20 10 ENE
8 Jul -0.4 22:30:36 10 WNW 22:32:53 20 NNW 22:35:09
10 NNE
9 Jul -2.3 21:19:07 10 WSW 21:21:59 51 NW
21:24:52 10 NE
9 Jul 0.5 22:56:57 10 NW 22:57:45 11 NNW
22:58:34 10 N
10 Jul -0.3 21:44:24 10 WNW 21:46:38 19 NNW 21:48:52
10 NNE
11 Jul -2.1 20:32:50 10 WSW 20:35:42 49 NW
20:38:34 10 NE
11 Jul 0.5 22:10:46 10 NNW 22:11:28 11 NNW 22:12:10
10 N
12 Jul -0.2 20:58:06 10 WNW 21:00:18 19 NNW 21:02:30
10 NNE
13 Jul 0.4 21:24:29 10 NNW 21:25:07 10 NNW 21:25:44
10 N
15 Jul 0.3 20:38:12 10 NNW 20:38:41 10 NNW 20:39:11
10 N
15 Jul 0.1 23:49:29 10 NNW 23:50:13 13 N
23:50:13 13 N

Michael Malolepszy
St. Louis Astronomical Society