Bright whitish blue stationary light, 15º north, 10º west of immediate overhead view. Object twice as bright as Mars. Object suddenly increased in luminosity while stationary. Commutor plane passes underneath. Object rapidly moves slightly to the north and mostly upwards. Object becomes smaller and smaller until it is a barely visible dot of light higher up in sky. Within 5 seconds, from a stationary point, object became unviewable as it was lost in the dark sky above.

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Report is consistent, we believe, with a sighting of a "flare" reflection form Iridium satellite #16.  Please see entry from  below:
 
Iridium Flares  | Home | Prev. | Next | Help |  
Clicking on the time of the flare will load another page with more details,
including a map showing the track of the flare along the ground, and the
location of the nearest point of maximum intensity. 
Search Period Start:  16:48, Tuesday, 23 September, 2003  
Search Period End:  17:48, Thursday, 25 September, 2003  
Observer's Location:  Hoboken ( 40.7440°N, 74.0330°W) 
Local Time:  Eastern Daylight Time (GMT - 4:00)  
Date Local Time Intensity ( Mag) Alt.  Azimuth  Distance to flare centre Intensity at flare centre (Mag.) Satellite 
23 Sep 20:04:15 -1 37° 3° (N ) 24.4 km (W) -8 Iridium 12 
24 Sep 19:58:05 -5 39° 5° (N ) 6.4 km (W) -8 Iridium 16 
Developed and maintained by Chris Peat, Heavens-Above GmbH
END))