We study near-infrared properties of the old open cluster King 11, based on the 2MASS photometric data. We determine the location of the red giant clump(RGC) in the (K, J - K) colo-magnitude diagram and derive the distance modulus of King 11 to be (m-M)0 = $12.50 ± 0.10 using the mean K magnitude of RGC. From the red giant branch slope - [Fe/H] relation we obtain the metallicity of this cluster, [Fe/H]=-0.17±0.07. The age and interstellar reddening of this cluster are estimated to be log t = 9.48±0.05, E(B-V)=0.90±0.03, by applying Padova isochrone fits to the data.

• JaeMann Kyeong(Korea Astronomy & Space Science Institute)
• Hong-Kyu Moon(Korea Astronomy & Space Science Institute)
• Sang Chul Kim(Korea Astronomy & Space Science Institute)
• Eon-Chang Sung(Korea Astronomy & Space Science Institute)