Photometry of the poorly studied galactic open star clusters King 13, King 18, King 19, King 20, NGC 136, and NGC 7245

We present the results of our BV R c I c CCD photometry for six Galactic open star clusters toward the Perseus spiral armperformed at the Special Astrophysical Observatory of the Russian Academy of Sciences. Based on these data and using JHK s photometry from the 2MASS catalog, we have determined the ages, distances, and color excesses for the clusters: 710 Myr, 2960 −340 +400 pc, 0 · m 56 ± 0 · m 04 (King 13); 130 Myr, 3010 −280 +300 pc, 0 · m 69 ± 0 · m 04 (King 18); 560 Myr, 2630 −270 +310 pc, 0 · m 69 ± 0 · m 08 (King 19); 160 Myr, 1750 −70 +80 pc, 0 · m 77 ± 0 · m 05 (King 20); 250 Myr, 5220 −320 +350 pc, 0 · m 70 ± 0 · m 09 (NGC 136); 320 Myr, 3390 −200 +210 pc, 0 · m 43 ± 0 · m 03 (NGC 7245).