We present BV CCD photometry for the open clusters Czernik 24 and Czernik 27. These clusters have never been studied before, and we provide, for the first time, the cluster parameters; reddening, distance, metallicity and age. Czernik 24 is an old open cluster with age 1.8 ± 0.2 Gyr, metallicity [Fe/H]=-0.41 ± 0.15 dex, distance modulus (m-M)0=13.1 ± 0.3 mag (d=4.1 ± 0.5 kpc), and reddening E(B-V)=0.54 ± 0.12 mag. The parameters for Czernik 27 are estimated to be age=0.63 ± 0.07 Gyr, [Fe/H]=-0.02 ± 0.10 dex, (m-M)0=13.8 ± 0.2 mag (d=5.8 ± 0.5 kpc), and E(B-V)=0.15 ± 0.05 mag. The metallicity and distance values for Czernik 24 are consistent with the relation between the metallicity and the Galactocentric distance of other old open clusters. We find the metallicity gradient of 51 old open clusters including Czernik 24 to be Δ[Fe/H]/ΔRgc = -0.064±0.009 dex kpc-1.

• Sang-Chul Kim(Korea Astronomy and Space Science Institute)
• Hong-Soo Park(Astronomy Program, SEES, Seoul National University)
• Sang-Mo Tony Sohn(Korea Astronomy and Space Science Institute)
• Myung-Gyoon Lee(Astronomy Program, SEES, Seoul National University)
• Byeong-Gon Park(Korea Astronomy and Space Science Institute)
• Hwan-Kyung Sung(Department of Astronomy and Space Science, Sejong University)
• Hong-Bae Ann(Department of Earth Science, Pusan National University)
• Moo-Young Chun(Korea Astronomy and Space Science Institute)
• Seung-Lee Kim(Korea Astronomy and Space Science Institute)
• Young-Beom Jeon(Korea Astronomy and Space Science Institute)
• In-Soo Yuk(Korea Astronomy and Space Science Institute)
• Sang- Hyun Lee(Gimhae Astronomical Observatory)