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- W2059054950 abstract "view Abstract Citations (12) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Photographic a-Capricornid meteors Wright, Frances ; Jacchia, Luigi G. ; Whipple, Fred Abstract . A survey of all photographic n-Capricornid meteors found on Harvard plates from 1899 through 1953, and an analysis of the radiants and orbits from twelve double-station and fifty single-station meteors suggests two alternative hypotheses for the nature of the a-Capncornid stream: (I) that it is a continuous stream of single origin, observable from July 16 to August 22, and comprised of several small visual showers; or (2) that it comprises two, or possibly more, inde- pendent streams: one from July 16 to August 1 and another from August 1 to August 22. If the a-Capricornids are a single stream, then the daily equatorial motion is 52' + 2.4 eastward and 2' + 2.6 south- ward per day for the mean corrected radiant; from a = 294?5, = 9?3 (1950) on July 16-17 to a = 325?I, = - I0?2 (1950) on August 21-22. The inclination of the mean radiant path to the ecliptic is about I9 , and maximum activity occurs around August 1. The twelve doubly-photographed meteors provide the first accurate orbits for the n-Capricornids. The aphelia are well within Jupiter's orbit for the July stream, and close to it for the August stream, without much continuity between the two streams. The n-Capricornids appear not to be related to the parent comets suggested by previous investigators, but possibly to Comet I948n. The irregular frequency distribution of meteors with date, the large scatter in radiants, the large increase in scatter with date, the high inclination of the radiant path to the ecliptic, and the increase of both aphelion distance and longitude of perihelion with date, support the second hypothesis, that the stream probably has a double or possibly a multiple origin. Publication: The Astronomical Journal Pub Date: March 1956 DOI: 10.1086/107291 Bibcode: 1956AJ.....61...61W full text sources ADS |" @default.
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- W2059054950 date "1956-03-01" @default.
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- W2059054950 title "Photographic a-Capricornid meteors" @default.
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