On the Perseid meteor stream. I. Magnitude data.

Visual observations yielded 36876 magnitude estimates of which 11320 were sporadics and 21148 were Perseids. Sufficient numbers of meteor estimates were available for the Perseids from July 29 - 30 until August 16, inclusive, to study mass distribution variations from day to day. A remarkable increment in faint Perseids was found for August 8 - 9, 1986. The 1986 Perseids were remarkably strong in faint meteors during the whole activity period.