Lightcurves of Centaurs 2000 QC and 2001 PTJ. L. Ortiz, S. Baumont, P. J. Gutiérrez and M. Roos–SeroteA&A, 388 2 (2002) 661-666DOI: https://doi.org/10.1051/0004-6361:20020487
and 2001 PT
and 2001 PT