Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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PHOTOMETRIC STUDY OF NPA ROTATOR (5247) KRYLOV

  • Lee, Hee-Jae (Department of Astronomy and Space Science, Chungbuk National University) ;
  • Moon, Hong-Kyu (Korea Astronomy and Space Science Institute) ;
  • Kim, Myung-Jin (Korea Astronomy and Space Science Institute) ;
  • Kim, Chun-Hwey (Department of Astronomy and Space Science, Chungbuk National University) ;
  • Durech, Josef (Institute of Astronomy, Faculty of Mathematics and Physics, Charles University) ;
  • Choi, Young-Jun (Korea Astronomy and Space Science Institute) ;
  • Oh, Young-Seok (Korea Astronomy and Space Science Institute) ;
  • Park, Jintae (Korea Astronomy and Space Science Institute) ;
  • Roh, Dong-Goo (Korea Astronomy and Space Science Institute) ;
  • Yim, Hong-Suh (Korea Astronomy and Space Science Institute) ;
  • Cha, Sang-Mok (Korea Astronomy and Space Science Institute) ;
  • Lee, Yongseok (Korea Astronomy and Space Science Institute)
  • Received : 2017.03.31
  • Accepted : 2017.05.08
  • Published : 2017.06.30
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Abstract

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 $P_1=82.188{\pm}0.013h$ and a secondary period $P_2=67.13{\pm}0.20h$ 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.

Keywords

References

  1. Bertin, E. 2005, Automatic Astrometric and Photometric Calibration with SCAMP, ASPC, 351, 112
  2. Bowell, E., Hapke, B., & Domingue, D., et al. 1989, Application of Photometric Models to Asteroids, in Binzel, R. P., Gehrels, T., & Matthews, M. S., Asteroids II (Tucson: Univ. Arizona Press), 524
  3. Buchheim, R. K. 2010, Methods and Lessons Learned Determining the H-G Parameters of Asteroid Phase Curves, SASS, 29, 101
  4. Carruba, V. 2009, An Analysis of the Region of the Phocaea Dynamical Family, MNRAS, 398, 1512 https://doi.org/10.1111/j.1365-2966.2009.15220.x
  5. Dandy, C. L., Fitzsimmons, A., & Collander-Brown, S. J. 2003, Optical Colors of 56 Near-Earth Objects: Trends with Size and Orbit, Icarus, 163, 363 https://doi.org/10.1016/S0019-1035(03)00087-3
  6. Farinella, P., Vokrouhlicky, D., & Hartmann, W. K. 1998, Meteorite Delivery via Yarkovsky Orbital Drift, Icarus, 132, 378 https://doi.org/10.1006/icar.1997.5872
  7. Gil-Hutton, R. 2006, Identi cation of Families among Highly Inclined Asteroids, Icarus, 183, 93 https://doi.org/10.1016/j.icarus.2006.02.009
  8. Gilliland, R. L., & Brown, T. M. 1988, Time-Resolves CCD Photometry of an Ensemble of Star, PASP, 100, 754 https://doi.org/10.1086/132232
  9. Harris, A. W. 1994, Tumbling Asteroids, Icarus, 107, 209 https://doi.org/10.1006/icar.1994.1017
  10. Hudson, R. S., & Ostro, S. J. 1995, Shape and Non-Principal Axis Spin State of Asteroid 4179 Toutatis, Science, 270, 84 https://doi.org/10.1126/science.270.5233.84
  11. Jordi, K., Grebel, E. K., & Ammon, K. 2006, Empirical Color Transformations between SDSS Photometry and other Photometric Systems, A&A, 460, 339 https://doi.org/10.1051/0004-6361:20066082
  12. Kaasalainen, M. 2001, Interpretation of Lightcurves of Precessing Asteroids, A&A, 376, 302 https://doi.org/10.1051/0004-6361:20010935
  13. Karachkina, L. G. 1982, The Minor Planet Circulars/Minor Planets and Comets, MPC, 8723
  14. Kim, M.-J. 2014, PhD thesis, Yonsei University, Korea
  15. Kim, S.-L., Park, B.-G., & Chun, M.-Y. 1999, Variable Stars in the Open Cluster Mel 71, A&A, 348, 795
  16. Kim, S.-L., Lee, C.-U., & Park, B.-G., et al. 2016, KMT-NET: A Network of 1.6 M Wide-Field Optical Telescopes Installed at Three Southern Observatories, JKAS, 49, 37
  17. Lenz, P., & Breger, M. 2005, Period04 User Guide, CoAst, 146, 53
  18. Marsden, B. G., & Williams, G. V. 1993, The Minor Planet Circulars/Minor Planets and Comets, MPC, 22507
  19. Moon, H.-K, Kim, M.-J., & Yim, H.-S., et al. 2015. International Astronomical Union Symposium, 318, 206
  20. Munari, U., Henden, A., & Frigo, A., et al. 2014, APASS Landolt-Sloan BVgri Photometry of Rave Stars. I. DATA, Effective Temperatures, and Reddenings, AJ, 148, 81 https://doi.org/10.1088/0004-6256/148/5/81
  21. Pravec, P., Harris, A. W., & Scheirich, P., et al. 2005. Tumbling Asteroids, Icarus, 173, 108 https://doi.org/10.1016/j.icarus.2004.07.021
  22. Pravec, P., Scheirich, P., &  Durech, J., et al. 2014, The Tumbling Spin State of (99942) Apophis, Icarus, 233, 48 https://doi.org/10.1016/j.icarus.2014.01.026
  23. Scheirich, P.,  Durech, J., & Pravec, P., et al. 2010. The Shape and Rotation of Asteroid 2008 TC3, M&PS, 45, 1804
  24. Sperl, M. 1998, Manual for Period98: V1.0.4; A Period Search-Program for Windows and Unix, CoAst, 111, 1
  25. Usui, F., Kuroda, D., & Muller, T. G., et al. 2011, AcuA: the AKARI/IRC Mid-infrared Asteroid Survey, PASJ, 63, 1117 https://doi.org/10.1093/pasj/63.5.1117
  26. Veres, P., Jedicke, R., & Fitzsimmons, A., et al. 2015, Absolute Magnitudes and Slope Parameters for 250,000 Asteroids Observed by Pan-STARRS PS1-Preliminary Results, Icarus, 261, 34 https://doi.org/10.1016/j.icarus.2015.08.007
  27. Warner, B. D., Harris, A. W., & Pravec, P. 2009, The Asteroid Lightcurve Database, Icarus, 202, 134 https://doi.org/10.1016/j.icarus.2009.02.003