I calculated the minimum time. minI UMAW 2453848.387 0.000 Hel SSW n=28 (calculated by Nagai) W UMa JD(hel)=2453848.387 C=2453848.440 E=24226 O-C=-0.053 - 22/Apr/2006 W UMa (By Mr.Swierczynski) - 07 + | + | * ** * * 08 + *** ** * | *** *** + ******* | 09 + +--------+--------+--------+--------+ 19 20 21 22 23 (UT)