2015 and January 2017 (). Two more lightcurves by Robert Stephens at the Center for Solar System Studies gave a period of and hours with a brightness variation of and magnitude in March 2014 and September 2019, respectively (). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Newcombia measures () and () kilometers in diameter and its surface has an albedo of () and (), respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 13.58 kilometers based on an absolute magnitude of 11.7. Alternative mean-diameter measurements published by the WISE team include () and () with corresponding albedos of () and (). Notes References External links Lightcurve Database Query (LCDB), at www.minorplanet.info Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 000855 Discoveries by Sergei Belyavsky Named minor planets 19160403