PHOTOMETRY STUDY OF NPA ROTATOR (5247) KRYLOV

• Published in: Journal of the Korean Astronomical Society, 50(3) pp. 41 - 49
• Main Authors: 이희재, 문홍규, 김명진, 김천휘, Josef Durech, 최영준, 오영석, 박진태, 노동구, 임홍서, 차상목, 이용석
• Format: Journal Article
• Language: English
• Published: 한국천문학회 01.07.2017
• Subjects: 천문학
• ISSN: 1225-4614; 2288-890X

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 $B - V = 0.841 \pm 0.035$, $V - R = 0.418 \pm 0.031$, and $V - I = 0.871 \pm 0.031$ where the phase angle is 14.1$^{\circ}$. They are acquired after the standardization of BVRI instrumental measurements using the ensemble normalization technique. Based on the color indices, (5247) Krylov is classified as a S-type asteroid. Double periods, that is, a primary period $P_{1} = 82.188\pm0.013$\,h and a secondary period $P_{2} = 67.13\pm0.20$\,h are identified from period searches of its R band light curve. The light curve phases with $P_{1}$ and this indicate that it is a typical Non-Principal Axis (NPA) asteroid. We discuss the possible causes of its NPA rotation. KCI Citation Count: 2