The Meteor Shower of Aquarids (July)

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ON July 27 ninety-three shooting stars were seen here, between 10h. 3om. and 14h. 30m., which, after making allowance for time occupied in charting the paths, is equivalent to about twenty-nine per hour for one observer. There was a rich shower of Aquarids from a point near μ. Aquarii, at R.A. 343°, 14° S. declination, which gave twenty-two meteors. These were rather bright, not very swift, with moderately long paths (averaging 17°), and quite devoid of streaks. I had seen about five meteors of this system on the preceding night, and on the 28th I watched a very hazy condition of sky-in which the stars shone dimly-for four hours, and of forty-four meteors seen five or six others were Aquarids. This active shower was well seen by Capt. Tupman on July 27, 1870, with an accurately-defined radiant at 340°-14°, from fourteen meteors (see No. 43 of his catalogue), and on the four following nights he traced about forty-seven others from the same shower, though the centre seemed a little further south, at 340°-19° on the 28th. On the 27th he recorded seven meteors of this stream within the twenty-one minutes, from 14h. 3m. to 14h. 24m. It was also seen by me, at 342°-12° (ten meteors), on August 3-17 last year; and Schmidt gives radiants at 337°-11° for July 20-31, and at 344°-11° for August. Neumayer, in the southern hemisphere, also has a position at 337°-10° (July), and Heis at 339°-10° for July 27-31. The average centre from these eight independent determinations is at 340°-13° for this important shower, which evidently comes to a strong maximum on about July 27-29. The end of July has long been known as a meteor-epoch of considerable intensity, with a maximum, according to Quetelet, between the 27th and 29th, which is thus amply confirmed by recent observations, and proves these Aquarids to be but little less in importance to the annually-recurring showers of Lyrids, Orionids, Taurids, and Geminids.

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