Free Access

Fig. 2


Left panels: variation of the distance from the Sun (top panel) for Encke (black) and ISON (red), and from STEREO-A in AU (bottom panel). Continuous lines mark the time intervals when the comets are visible in the HI-1 FoV, dotted lines the opposite. The blue dashed line in the bottom panel indicates the STEREO A-Sun distance, which is a reference line to visualise when the comets are behind or in front of the plane-of-sky. Right panels: orbital speed of the comets (top panel), and variation of the latitude in the Helio-Centric-Inertial (HCI) coordinate system (bottom panel).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.