We conduct BVRI and R band photometric observations of asteroid (5247) Krylov from January 2016 to April 2016 for 51 nights using the Korea Microlensing Telescope Network (KMTNet). The color indices of (5247) Krylov at the light curve maxima are determined as B - V = 0:841  0:035, V -R = 0:4180:031, and V -I = 0:8710:031 where the phase angle is 14.1◦. They are acquired after the standardization of BVRI instrumental measurements using the ensemble normalization technique. Based on the color indices, (5247) Krylov is classied as a S-type asteroid. Double periods, that is, a primary period P1 = 82:188  0:013 h and a secondary period P2 = 67:13  0:20 h are identied from period searches of its R band light curve. The light curve phases with P1 and this indicate that it is a typical Non-Principal Axis (NPA) asteroid. We discuss the possible causes of its NPA rotation.

Abstract
1. INTRODUCTION
2. OBSERVATIONS AND DATA REDUCTION
3. RESULTS
    3.1. Spin State
    3.2. Taxonomy
4. SUMMARY AND DISCUSSIONS
REFERENCES

• Hee-Jae Lee(Department of Astronomy and Space Science, Chungbuk National University/Korea Astronomy and Space Science Institute) Corresponding author
• Hong-Kyu Moon(Korea Astronomy and Space Science Institute)
• Myung-Jin Kim(Korea Astronomy and Space Science Institute)
• Chun-Hwey Kim(Department of Astronomy and Space Science, Chungbuk National University)
• Josef Durech(Institute of Astronomy, Faculty of Mathematics and Physics, Charles University)
• Young-Jun Choi(Korea Astronomy and Space Science Institute/Astronomy and Space Science, University of Science and Technology)
• Young-Seok Oh(Korea Astronomy and Space Science Institute/School of Space Research, Kyung Hee University)
• Jintae Park(Korea Astronomy and Space Science Institute)
• Dong-Goo Roh(Korea Astronomy and Space Science Institute)
• Hong-Suh Yim(Korea Astronomy and Space Science Institute)
• Sang-Mok Cha(Korea Astronomy and Space Science Institute/School of Space Research, Kyung Hee University)
• Yongseok Lee(Korea Astronomy and Space Science Institute/School of Space Research, Kyung Hee University)