Abstract
view Abstract Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Meteor Magnitude Distributions. Millman, Peter M. ; Burland, Miriam S. Abstract The visual meteor observations of the International Geophysical Year program give a total of over 120 000 meteors. These records are being analyzed, using IBM punched- card procedures. Magnitude distributions are being studied by methods similar to those reported by Millman and Burland at the 96th Meeting of the A.A.S. in 1956 (J. Roy. Astron. Soc. Canada 51, 113, 1957). In the previous paper it was found that the ratio of the numbers of meteors in adjacent whole magnitude classes was in the neighborhood of 3.5 for the Canadian visual observations, made in the period 1933-1956. The IGY-IGC visual meteor program includes the records of over 10 000 different meteors observed at the Springhill Meteor Observatory, 1957- 1960. A preliminary analysis of this material indicates that several factors have a marked influence on the magnitude ratio found. Most important among these are the total number of meteors included, the sky luminosity and weather factor, and the mean elevation of the meteors above the horizon. Individual values of the magnitude ratio determined from various groupings of the observations ranged from 2 to 4 with an over-all mean value of 2.7. The best value for observations made near the zenith under perfect weather conditions with a dark sky is 3.0. This agrees with the general mean determined by C)pik (Mem. Soc. Roy. Sci. Liege Ser. 4, 15,125,1955; Contrib. Armagh Obs. No. 26,1958) from 20 000 meteors observed on the Arizona expedition 1932-1933, but is a little lower than the magnitude ratio found by Hawkins and Upton (Astrophys. J. 128,727,1958) from super-Schmidt photographic observations. The magnitude ratio probably should not be assumed as constant over a large magnitude range. Publication: The Astronomical Journal Pub Date: March 1961 DOI: 10.1086/108578 Bibcode: 1961AJ.....66S.291M full text sources ADS |
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