- Lucian Curelaru
- Marcel Popescu
bibliography:
- 'paper114.bib'
title: |
    Mega-Archive and the EURONEAR Tools for Datamining\
    World Astronomical Images
---

Data mining ,asteroids ,near Earth asteroids (NEAs) ,image archives ,Mega-Archive ,Mega-Precovery.

Introduction {#sec1}
============

The world astronomical image archives provide valuable means to improve the physical properties of Solar System bodies, and in particular of near Earth asteroids (NEAs) which remain observable for short period of times. NEAs represent laboratories for studying the formation and evolution of the minor planets and their physical interactions with Sun and the major planets. Part of NEAs, potentially hazardous asteroids (PHAs) and virtual impactors (VIs) could pose some risk due to their possibility of impact, but they also represent an opportunity for cheaper space missions and eventually future mining industries.\
Upon discovery, the recovery and follow-up of NEAs are essential for providing the initial orbital solution and for searching of possible linkage with previously known objects. In most cases, smaller NEAs fade rapidly and become invisible even for largest telescopes which are expensive to access and usually lack time for urgent reaction. However, the existing image archives represent a free opportunity to improve the orbital knowledge based on serendipitous encounters of targets 