The Innisfree meteorite and the Canadian camera network

Details The Innisfree meteorite and the Canadian camera network The Innisfree meteorite and the Canadian camera network

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jrasc..72...15h&link_type=abstract

Journal of the Royal Astronomical Society of Canada, vol. 72, Feb. 1978, p. 15-39.

Astronomy and Astrophysics

Astronomy

36

Astronomical Photography, Meteor Trails, Meteorites, Photographic Tracking, Tracking Networks, Bruderheim Meteorite, Cameras, Canada, Chondrites, Cosmic Rays, Data Acquisition, Ground Stations, Impact Prediction, Radiation Measurement, Trajectories, Visual Observation, Wide Angle Lenses

Scientific paper

The events which led to the establishment of the camera network known as the Meteorite Observation and Recovery Project (MORP) are described. The network consists of 12 small observatories, each equipped with five cameras, a meteor detector, and exposure control systems. A bright fireball was observed from the ground and from an aircraft above clouds. Two MORP stations photographed the event, from which a predicted impact point was calculated, leading to the recovery of a 2-kg meteorite near Innisfree, Alberta. Five smaller pieces were located after the disappearance of snow. Measurements of the weak radioactivity produced by cosmic-ray activity were made on the main piece shortly after recovery. The results are of special interest because the meteor photographs provide a reliable orbit for the object before impact. Innisfree is only the third meteorite for which such a well-defined orbit is available. The low-inclination direct orbit appears normal for asteroidal fragments which collide with earth.

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