images in [*Mega-Archive*]{}. We presented the architecture of [*Mega-Archive*]{} and its connection to the new EURONEAR tools as a flowchart in another recent paper [@Curelaru2019]. Thanks to the new SQL architecture, the searches of [*Mega-Archive*]{} have become faster for Solar system objects (taking a few minutes necessary to build accurate ephemerides needed to search the entire archive of 15 million observations for one asteroid) and extremely fast for fixed objects (taking only few fractions of a second for one target).

Mega-Archive Daily Update Crawler
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Major observatories ingest in their archives observations and images on a daily basis, which makes these databases appealing for searches related to very rapid time-domain phenomena. In other cases, dedicated surveys become ingested in archives much later, following the image reduction, project completion or expiration of proprietorship periods (typically one year following the observing date). Nevertheless, some newly discovered objects could rapidly raise attention of the astronomical communities, society and mass-media, such as a potential impactor asteroid, the interstellar object ’Oumuamua or a close supernova. Sometimes such objects become very rapidly invisible even in largest telescopes, thus data mining remains the only possibility to prevent loss and obtain more information. In these cases, data mining 