young astronomer at Heidelberg. Physical characteristics In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Herluga is a common, carbonaceous C-type asteroid. Rotation period In November 2008, a rotational lightcurve of Herluga was obtained from photometric observations by James W. Brinsfield at the Via Capote Observatory in California. Lightcurve analysis gave a rotation period of hours with a brightness variation of magnitude (). In August 2016, an alternative period determination of hours with an amplitude of mag was published (). Diameter and albedo According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Japanese Akari satellite, and the Infrared Astronomical Satellite IRAS, Herluga measures (), () and () kilometers in diameter and its surface has a low albedo of (), () and (), respectively. The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0421 and a diameter of 32.47 km based on an absolute magnitude of 11.5. Further published mean-diameters by the WISE team in ascending order include (), (), (), () and () with albedos between 0.03 and 0.06. References External links Lightcurve Database Query (LCDB), at www.minorplanet.info Dictionary of Minor Planet Names, Google books Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 000923 Discoveries by Karl Wilhelm Reinmuth Named minor planets 19190930