939 Isberga is an asteroid of the inner asteroid belt near the region of the Flora family. It was discovered from Heidelberg on 4 October 1920 by Karl Wilhelm Reinmuth. As was his common practice, Reinmuth gave the asteroid a feminine name without reference to any specific person.Lutz D. Schmadel, Dictionary of Minor Planet Names, 5th edtn. (2003), p.83.
Isberga rotates quickly, with a period of 2.9173 hours. It is also suspected to be a binary asteroid, due to a second periodicity observed in its lightcurve from 24 February to 4 March 2006. The secondary object has an orbital period of 26.8 hours, but its size is undetermined.
References
External links Asteroids with Satellites, Robert Johnston, johnstonsarchive.net Asteroid Lightcurve Database (LCDB), query form (info ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center