Moons around asteroids can be discovered by monitoring the amount of Sun light reflected by asteroids over time. Temporary eclipses and occultations between the two components of a binary asteroid create drops in their light curve.
As spin and orbital periods of binary asteroids range up to tens of hours, the full event cannot be recorded by a single observatory.
We coordinate observations of asteroids using meter-class telescopes over the world. The contribution of foreign observatories enables for continuous monitoring over 24/24 hours.