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It is likely SL-3 R/B (Soyuz SL-3 rocket body). This one made a pass during the time you mentioned on 4/5, 5/6 & 6/6 (Did not check other days).
The magnitude is about 3.5 but varies as it rises and sets.
I used Satellite Safari 1.6.4 app and also GoSatWatch 3.2 app (both payware).
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