Middlesbrough meteorite

The Middlesbrough meteorite fell in Middlesbrough, North Yorkshire, England on 14 March 1881.

The meteorite fell in the afternoon, hitting the ground around 3:35 pm. Although there were reports that sound generated as the object travelled through the Earth's atmosphere was heard in some areas of Yorkshire, the meteorite was unusual in that the sonic boom that would normally be associated with a meteorite entering the atmosphere was not heard by anyone who witnessed the fall, nor were there any reports of either a fireball or smoke trail.^[1]

The site of the impact was at the railway siding Pennymans's Siding, close to the site of the now demolished St. Luke's Hospital (now Roseberry Park). The exact location was reported as being 19 yards south of the signal cabin and on the west side of the railway lines; this gives co-ordinates of 54 deg 33 min 31 sec N and 1 deg 12 min 57 sec W.^[2] The impact was witnessed by workmen only yards away, who heard a "rushing or roaring" sound followed by thud, as the meteorite hit a nearby embankment,^[3] leaving a hole described by the astronomer Alexander Herschel as a "round vertical hole into which a man's arm might be thrust".^[1] The meteorite had penetrated to a depth of about 30 cm and was described as "new milk warm" to the touch by the workmen when they retrieved the object.^[1]

Herschel, who was then Professor of Physics and Experimental Sciences at Durham College of Physical Science in Newcastle upon Tyne, rushed to Middlesbrough on hearing the news to supervise the recovery and examination of the meteorite. By experimentation, replicating the conditions of the impact, he determined the speed of the object at the time was 412 feet per second (281 mph).^[4] This result was viewed as partial confirmation of a theory of the Italian astronomer Giovanni Schiaparelli that meteorites lost most of their cosmic velocity (the velocity they had before entering the Earth's atmosphere), due to air resistance at a high altitude in the atmosphere.^[4]

El meteorito de Middlesbrough se clasifica como condrita . ^{[ 1 ]} Tiene aproximadamente 4.500 millones de años ^{[ 5 ]} y se formó al mismo tiempo que la Tierra y el Sistema Solar . Tiene aproximadamente 15  cm de diámetro, pesa 1,5  kg y tiene una corteza de grosor inusual; fue recuperado en una sola pieza. Científicos de la NASA realizaron un escaneo 3D del objeto en 2010. ^{[ 6 ] [ 7 ]}

Debido a que Middlesbrough no tenía museo en el momento de su caída a la Tierra, el meteorito fue entregado al Museo de Yorkshire, donde ha permanecido desde entonces. ^{[ 8 ]} En marzo de 2011, en el 130 aniversario de su caída a la Tierra, fue prestado al Museo Dorman de la ciudad , donde se exhibió durante varias semanas. ^{[ 6 ]}

• Glosario de meteorítica

• Imagen del meteorito de Middlesbrough en Flickr

54°33′29″N 1°12′58″O / 54.558°N 1.216°O / 54.558; -1.216