Objects flying in triangle formation.

me and my girlfriend was visiting some friends, and when we went home late that evening we saw a triangle shaped formation flying from north east to south west. it had the same speed all the time and used about 15 minutes crossing the skyline. we was trying to figure out what it was. but didn't come up with any awnsers. we never had heard about any satelites that flew in formation. but one thing was for sure, it was three single objects with one in the front and two in the back (a perfect triangle). we could both see the stars behind the objects when it floated past them. the lights where white, about the same color as the stars.
 in later times i've tried to search the net for this object. and found the NOSS satelite that could just fit the descritiption. But i've also read that this satelite don't go this far north?  -((initials deleted))- Sogn & Fjordane / Norway.
Witness indicates that the date of the sighting is approximate.  PD