Data Set Overview :  This data set is intended to include published broadband colors of centaurs and Transneptunian Objects (TNOs) published through January 2011. It also includes some comets with Centaur orbits.  Data :  Data were collected from the published literature and include Johnson-Kron-Cousins color indices and one-sigma uncertainty values. Many objects have data reported by several groups. Details of the observations and data reduction are to be found in the individual papers. Note that only UBVRIJHK colors are included in this collection. For ECAS colors of Centaur 2060 Chiron, see the PDS ECAS data set, EAR-A-2CP-3-RDR-ECAS-V4.0.  Archiving History :  The TNO colors data set, EAR-A-3-RDR-TNO-PHOT, was first introduced in 2000 and has been updated annually since then. At the 2004 review, a data set compiling colors of Centaurs was also introduced, and it was decided to combine the two to make a new data set. A column was added to the data table to indicate whether the object is a TNO or a Centaur. In the 2009 update, a column was added to specify if the measurement was made of the primary or secondary, or of the coma or nucleus, of the target body. In 2010, the column identifying the dynamic classification (TNO or CEN) was changed to reflect the classification by the MPC (TNO or CEN/SDO) rather than the assignment made by the individual publication, as it had been in earlier versions of the data set.  This data set supersedes all the versions of the TNO colors data set, EAR-A-3-RDR-TNO-PHOT.

Confidence Level Overview : We assume the R-bandpass used by the various observers is in the Kron-Cousins system, but that this cannot be verified for all of the measurements included in this data set.  Refer to the individual published papers for the confidence level of any individual measurement.