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Location, orbit and energy of a meteoroid impacting the moon during the Lunar Eclipse of January 21, 2019 | | Jorge I. Zuluaga [SEAP/IF/UdeA]
; Pablo A. Cuartas-Restrepo [SEAP/IF/UdeA]
; Jonathan Ospina [SCLUB/SAA]
; Fritz Pichardo [ASTRODOM]
; Sergio A. Lopez [SCLUB/SAA]
; Karls Pena [ASTRODOM]
; J. Mauricio Gaviria-Posada [Obs.LaLoma]
; | | Date: |
28 Jan 2019 | | Abstract: | During the total lunar eclipse of January 21, 2019 at least two meteoroids
impacted the moon producing visible flash lights on the near side. One of the
impacts occurred on the darkest side of the visible lunar face and was
witnessed by many casual observers. In this paper we present estimations of the
location, impact parameters (velocity and incoming direction), orbit and energy
of the meteoroid, as obtained from images and videos collected by amateur
astronomers in Colombia, the Dominican Republic and Morocco. We use the novel
Gravitational Ray Tracing (GRT) technique to estimate the orbital properties
and radiant of the impactor. We find that that the meteoroid impacted the moon
with a speed of $13.8^{+4.3}_{-7.3}$ km/s and in a relatively shallow angle,
$ heta<35.6$ degrees. According to our photometric estimations, the impact
released $10^7$ J of visible light in a short time (0.30 seconds). The total
impact energy was $0.9-1.8$ tons of TNT which correspond to a body with a mass
between 20-100 kg and a diameter of 30-50 cm. If our assumptions are correct,
the crater left by the impact will have 7-15 meters across and it could be
detectable by prospecting lunar probes. These results arose from a timely
collaboration between professional and amateur astronomers which highlight the
importance of citizen science in contemporary astronomy. | | Source: | arXiv, 1901.9573 | | Services: | Forum | Review | PDF | Favorites | |
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