The Role of Eruptive Prominences in early CME Evolution: Investigation from Coordinated Multi-instrument Observations

We present a comprehensive multi-instrument analysis of a sequence of eruptive prominences observed on 21 September 2025, associated with clearly detected coronal mass ejections (CMEs). These events were simultaneously observed by PROBA-3/ASPIICS (in both He I D3 and Fe XIV), SDO/AIA, PROBA-2/SWAP 174 Å, Solar Orbiter/FSI 304 and 174 Å, and Metis in both visible light and UV Lyα, as well as from a separated viewpoint by STEREO-A/EUVI and COR1/COR2, and LASCO C2/C3 in the outer corona. The well-suited constellation of spacecraft, separated by approximately 45° each, together with the range of available instruments, provides unprecedented coverage of the eruptive structures from the solar surface through the low corona and into the outer corona, enabling the tracking of prominences across multiple temperature regimes and perspectives. The multi-wavelength and multi-viewpoint analysis of these eruptive prominences allows investigation of how prominence plasma evolves and interacts with the surrounding corona, and explores the contribution to the early CMEs development.