Post common envelope binaries from SDSS. IV: SDSSJ121258.25-012310.1, a new eclipsing system

From optical photometry we show that SDSSJ121258.25-012310.1 is a new neclipsing, post common-envelope binary with an orbital period of 8.06 hours and nan eclipse length of 23 minutes. We observed the object over 11 nights in ndifferent bands and determined the ephemeris of the eclipse to HJD_mid = n2454104. 7086(2) + 0.3358706(5) x ..