@conference{10272/9214,
year = {2011},
url = {http://hdl.handle.net/10272/9214},
abstract = {Historical reports of bright fireballs
are useful to better understand which meteoroid
streams can be temptatively associated with meteoritedropping
events [1]. We present here a preliminary
analysis of a very remarkable event that took place
over Spain on Dec. 8, 1932 and the evidences that support
its likely connection to the δ-Arietids meteor
shower. Besides, there is evidence that indicate that
another very bright, although less important, event was
witnessed over the same region during the same day
could be also associated to this shower. The δ-Arietids
is a minor shower which is included in the IAU working
list of meteor showers with the code 289 DNA [2].
Very few data exist for this radiant and, so, any new
contributions about it are of great interest.
The densities calculated for δ-Arietids meteoroids
are comprised between 2000 and 5000 kg/m3, which
suggest that that their parent body must be an asteroid
[3]. Thus, one NEO, asteroid 1990 HA (217628 Lugh),
has been proposed as the parent body for this shower
[4]. This is an Apollo family asteroid with a diameter
of about 1.4 km which is catalogued as a PHA. Moreover,
this shower has been proposed as a candidate for
potential meteorite dropping events, and one fireball
recorded on Dec. 13, 1975 is believed to have produced
a meteorite with a surviving terminal mass of
about 290 g. [3, 4]. 1990 HA is not, however, the only
NEO which has been reported to be able to produce
meteorites. Thus, recently, asteroid 2002NY40 was
proven to be the source of meteorite dropping bolides
[5].},
title = {Historical records of δ-Arietids superfireballs over Spain},
author = {Madiedo Gil, José María and Trigo Rodríguez, Josep María},
}