indicative of an elongated shape (). The result supersedes observations by Richard Binzel (1982) and René Roy (2005), who determined a period of and with an amplitude of and magnitude, respectively (). Poles Two lightcurves, published in 2016, using modeled photometric data from the Lowell Photometric Database (LPD) and other sources, gave a concurring sidereal period of and hours, respectively. Each modeled lightcurve also determined two spin axes of (68.0°, 58.0°) and (253.0°, 61.0°), as well as (262.0°, 71.0°) and (47.0°, 66.0°) in ecliptic coordinates (λ,β). Diameter and albedo According to the surveys 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, Walküre measures (), () and () kilometers in diameter and its surface has an albedo of (), () and (), respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0634 and gives a diameter of 38.41 kilometers (identical to IRAS) based on an absolute magnitude of 10.69. Alternative mean-diameter measurements published by the WISE team include () and () with corresponding albedos of () and (). 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 000877 Discoveries by Grigory Neujmin Named minor planets 000877 19150913