Solar Phys DOI 10.1007/s11207-012-0107-5 THE SUN 360 First 4D Reconstruction of an Eruptive Prominence Using Three Simultaneous View Directions I. Chifu · B. Inhester · M. Mierla · V. Chifu · T. Wiegelmann Received: 4 November 2011 / Accepted: 13 August 2012 © Springer Science+Business Media B.V. 2012 Abstract Data from the STEREO (Solar Terrestrial Relations Observatory) mission are intensively used for 3D reconstruction of solar coronal structures. After the launch of the SDO (Solar Dynamic Observatory) satellite, its additional observations give the possibility to have a third eye for more accurate 3D reconstruction in the very low corona (< 1.5 R ⊙ ). With our reconstruction code MBSR (Multi-view B-spline Stereoscopic Reconstruction), we use three view directions (STEREO A, B, and SDO) to perform the 3D reconstruction and evolution of a prominence which triggered a CME on 1 August 2010. In the paper we present the reconstruction of this prominence from the moment it starts to erupt until it leaves the field of view of the coronagraph. We also determine the evolution of the leading edge of the CME. Based on the temporal evolution, we analyze some of its properties, such as velocity, acceleration, opening and rotation angles and evolution of the cavity. Keywords Prominences · 3D reconstruction · Stereoscopy · Corona The Sun 360 Guest Editors: Bernhard Fleck, Bernd Heber, and Angelos Vourlidas I. Chifu ( ) · B. Inhester · V. Chifu · T. Wiegelmann Max Planck Institute for Solar System Research, Max Planck str 2, 37191 Katlenbutg-Lindau, Germany e-mail: chifu@mps.mpg.de I. Chifu Technical University Braunschweig, Braunschweig, Germany I. Chifu Astronomical Institute of Romanian Academy, Bucharest, Romania M. Mierla Institute of Geodynamics of the Romanian Academy, Bucharest, Romania M. Mierla Royal Observatory of Belgium, Brussels, Belgium