RT Journal Article T1 A large lunar impact blast on september 11th 2013 A1 Madiedo Gil, José María A1 Ortiz Moreno, José Luis A1 Morales, Nicolás AB On 2013 September 11 at 20h07m28.68 ± 0.01 s UTC, two telescopesoperated in the framework of our lunar impact flashes monitoring projectrecorded an extraordinary flash produced by the impact on the Moon of alarge meteoroid at selenographic coordinates 17.2 ± 0.2 º S, 20.5 ± 0.2 º W.The peak brightness of this flash reached 2.9 ± 0.2 mag in V and it lastedover 8 seconds. The estimated energy released during the impact of themeteoroid was 15.6 ± 2.5 tons of TNT under the assumption of a luminousefficiency of 0.002. This event, which is the longest and brightest confirmedimpact flash recorded on the Moon thus far, is analyzed here. The likelyorigin of the impactor is discussed. Considerations in relation to the impactflux on Earth are also made PB Oxford University Press SN 0035-8711 SN 1365-2966 (electrónico) YR 2014 FD 2014-04 LK http://hdl.handle.net/10272/9066 UL http://hdl.handle.net/10272/9066 LA eng NO Madiedo Gil, J.M., Ortiz Moreno, J.L., Morales, N.: "A large lunar impact blast on september 11th 2013". Monthly Notices of the Royal Astronomical Society. Vol. 439, n. 3, pág. 2364-2369, (2014). ISSN 0035-8711 DS Repositorio Institucional de la Universidad de Huelva RD 1 jun 2026