High-resolution radar studies of the Geminid meteor shower

Details High-resolution radar studies of the Geminid meteor shower High-resolution radar studies of the Geminid meteor shower

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200..281j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, July 1982, p. 281-291. Research supported by the National Research

Astronomy and Astrophysics

Astronomy

13

Astronomical Maps, Geminid Meteoroids, Mass Distribution, Radar Imagery, Diurnal Variations, High Resolution, Radar Echoes

Scientific paper

A new, high resolution imaging meteor radar system was used during the 1980 Geminid shower to record 1013 Geminid echoes. At its peak, the rate of shower meteors was 13 times that of the sporadic meteor background. The rms width of the radiant was found to decrease from 1.3 to 0.8 deg over the duration of the shower, while shower activity increased exponentially before the peak at L = 261.3 deg. While finding no evidence for the previously postulated second center of activity near RA = 90.0 deg, dec = 32.0 deg, a corrected radiant of RA = 112.3, dec = 33.05 deg is established. The shower, which has an apparent period of detectability in the December 2-15 period, is found to have a mass distribution index mean value which, at 1.69 + or - 0.07, corresponds to meteors of +8.0 + or - 0.5 mean magnitude.

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