sentences:  "Lindgren" has been characterized as a "bright" carbonaceous B-type asteroid in both the Tholen-like and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2).It is also an assumed C-type asteroid.In August 2012, two rotational lightcurves of "Lindgren" were obtained from photometric observations by astronomers at the Palomar Transient Factory in California.