using photometric data from the Lowell Photometric Database was published in 2016. It gave a concurring sidereal period of hours and a spin axis at (355.0°, −78.0°) 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 Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Petunia measures , and kilometers in diameter, and its surface has an albedo of , and , respectively. An additional measurement published by the WISE team gives an alternative mean-diameter of . The Collaborative Asteroid Lightcurve Link adopts the WISE results revised by Pravec, that is an albedo of 0.1654 and a diameter of 29.12 km based on an absolute magnitude of 10.25. An asteroid occultation on 30 September 2014, gave a best-fit ellipse dimension of (). These timed observations are taken when the asteroid passes in front of a distant star. However the quality of the measurements are poorly rated. 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 000968 Discoveries by Karl Wilhelm Reinmuth Named minor planets 000968 19211124