1997 YL11 Ticha, J. ; Tichy, M. ; Sarounova, L. ; Helin, E. F. ; Pravdo, S. ; Lawrence, K. J. ; Rabinowitz, D. L. ; Marsden, B. G. Abstract Publication: Minor Planet Electronic Circulars Pub Date: January 1998 Bibcode: 1998MPEC....A...01T