Will need to track for a few days via a diamond-shaped grid (z time in x, calendar time in y) to determine orbital period.
Robert Christy over at Zarya.info back in August 2010 wrote that Kosmos 2463 was an example of a "broken" Russian Parus satellite. However very brief analysis tracking of that satellite today (13 Jun), places it closer to local midnight & local noon in the highest (and most likely strongest signal) passes. So perhaps Kosmos 2429 (more closer to the time noted) of this constellation is acting faulty?