  Motivated by the need to improve the ability to forecast whether a certain
coronal mass ejection (CME) is to impact Earth, and by the insufficiency of
statistical studies that analyze the whole erupting system with the focus on
the governing conditions under CME deflections, we performed a careful analysis
of 13 events along a one-year time interval showing large deflections from
their source region. We used telescopes imaging the solar corona at different
heights and wavelengths on board the Project for Onboard Autonomy 2 (PROBA2),
Solar Dynamics Observatory (SDO), Solar TErrestrial RElations Observatory
(STEREO), Solar and Heliospheric Observatory (SOHO) spacecraft and from
National Solar Observatory (NSO). By taking advantage of the quadrature
position of these spacecraft from October 2010 until September 2011, we
inspected the 3D trajectory of CMEs and their associated prominences with
respect to their solar sources by means of a tie-pointing tool and a forward
model. Considering the coronal magnetic fields as computed from a potential
field source surface model, we investigate the roles of magnetic energy
distribution and kinematic features in the non-radial propagation of both
structures. The magnetic environment present during the eruption is found to be
crucial in determining the trajectory of CMEs, in agreement with previous
reports.
