The first near Earth asteroid observation of the year has turned up a little surprise. Radar observations made from Arecibo indicate asteroid 2016 AZ8 turns out to have its own moon (the main asteroid is about 400m across and the moon is orbiting about 400m from it). Somewhat relatedly, asteroid 2017 YE5, observed in parallel (bistatic setup) by Arecibo and Green Bank last year turns out to be a binary asteroid system - actually two objects each about 900m in size orbiting their common barycentre with a period of about 20-24 hours. Actually ‘equal mass’ binary asteroid systems are not that uncommon. It is estimated that around 15% of near Earth asteroids of >200m size are binaries (there are three others known).