Need help identifying a flashing satellite

From: Christoffer Wallstenius (
Date: Mon Aug 19 2013 - 10:40:19 UTC

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    Hello, this is my first post to this list.
    Spotting location: Stockholm, Sweden
    Coordinates: N 59° 18.626' E 18° 6.020'
    Date: 2013-08-06
    Time: roughly 00:30 GMT (+- 5 minutes) (12:30 AM) (that is around 01:30
    local time)
    Direction of travel: Roughly between 0° and 15°, I didn't have a compass
    but it showed up in the south and travelled pretty much north.
    Period time: ca 90 minutes. (I observed it again after about 90 minutes)
    Period time of the light pattern: Ca 16-24 seconds. I didn't time it
    Brightness: Probably quite bright, light pollution in Stockholm is quite
    bad. For example in the Little Dipper only the 4 brightest stars was
    visible to the naked eye.
    At it's highest point in the sky it was pretty much right above me,
    probably a tad bit to the east. I've tried to identify it using
    heavens-above, but I couldn't find a match. The only ones I found matching
    the time, general direction of travel and elevation is Cosmos 1953 and
    Coronas F rocket, but I haven't been able to find information about if
    they're tumbling or not.
    Any help figuring out which satellite I saw is greatly appreciated!
    /Christoffer Wallstenius
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