Photographic i-Aquaridd meteors and evidence for the northern delta Aquarids

Abstract

view Abstract Citations (6) References (4) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Photographic i-Aquaridd meteors and evidence for the northern delta Aquarids Wright, Frances W. ; Jacchia, Luigi G. ; Whipple, Fred L. Abstract . The two thinly populated streams of -Aquarid meteors resemble the Taurids in being northern and southern branches which are symmetrical with respect to the ecliptic, or rather to Jupiter's orbit, but the Aquarids differ from the Taurids in having a greater scatter in aphelion distances. The mean radiant for both -Aquarid branches moves eastward about a degree per day, for well over a month in July and August for the southern branch, and for about 45 days in the case of the northern branch. The mean deviation of an extended meteor trail from the mean moving radiant is of the order of 2 for the southern and I 3 for the northern stream. This scatter is in general agreement with the relation derived from eight other photographic streams. Difficulties in identifying individual members of the various streams because of the number and looseness of the streams introduce serious uncertainties into the above data. Further investigation of streams in these areas seems un- likely to yield profitable scientific results. Two accurate double-station photographic meteors, nine double-station radiants with fairly well-determined velocities, and two single-station meteors provide photographic evidence for a northern branch of the -Aquarid meteors situated symmetrically about the ecliptic with respect to the well-known southern branch. The mean deviation of an extended meteor trail from the mean moving radiant is about I 2 over approximately 34 days. Publication: The Astronomical Journal Pub Date: September 1957 DOI: 10.1086/107524 Bibcode: 1957AJ.....62..225W full text sources ADS |