The  ESA  NEO  Coordination  Centre  (NEOCC)  is  the operative centre of the SSA-NEO  Segment.   It  is  located  at  ESA's establishment ESRIN (Frascati, Italy).  Its aim is to coordinate and contribute to the observation of small Solar System bodies in order to evaluate and monitor the NEO hazard.

This  implies  the availability of advanced systems for orbit computation and impact monitoring,  as  well  as  tools  and data needed for performing risk assessment  (e.g. follow-up  priorities,  physical  properties database). The SSA-NEO  segment  operates a  set  of  applications, called the NEO software system.  The  NEO software system provides information not only to scientific users, but also to other SSA customers and stakeholders, such as governmental institutions,  insurance  companies,  the  public  at large and the media. The stepwise  deployment of the NEO system began with a Precursor Services phase, presently  on-going  and  called  'Phase  2'.  The  key components of the NEO Precursor Services accessible via the SSA-NEO web portal are:

·         NEA search: displays dynamical and physical characteristics of any given object;

·         NEA catalogues: retrieves complete or filtered NEA lists sorted by parameters (e.g. discovery date, semimajor axis etc.);

·         Impact monitoring: displays lists of potentially dangerous objects and  the  associated  parameters  (e.g. impact probability, Palermo scale, orbit uncertainty);

·         Observer's  aid: provides priority criteria for planning follow-up observations;

·         Orbit  visualization: graphic display of the orbital motion of any NEA;

·         Image archive: searchable catalogue of astronomical images provided by ESA's telescopes (or telescopes under agreement with the agency):

·         Education and public outreach sections.

The NEO system services rely on the daily processing of NEO data performed by the AstOD software and on information of NEA physical properties as provided by the EARN database.

We kindly acknowledge Gerhard Hahn (retired from DLR) for providing the EARN data and for keeping our physical properties database updated until October 2018. No updates have been performed to the physical properties database since then.

Access to the NEO system data is public; authentication is required for certain elements (sky images and other measurement data) and tools.