1997 RD1 Ticha, J. ; Tichy, M. ; Pietrapiana, P. ; Scarfi, G. ; Garradd, G. J. ; Chiavenna, P. ; Giuliani, V. ; Manca, F. ; Casarramona, F. ; Vigil, E. ; Ikari, Y. ; Williams, G. V. Abstract Publication: Minor Planet Electronic Circulars Pub Date: September 1997 Bibcode: 1997MPEC....R...11T