Interplanetary Gas. XII. a Catalogue of Comet-Tail Orientations

Some 1600 observations of the position angle of comet tails, including both original and published measurements, are reduced to orientations in the plane of the orbit of the comet. Measured and computed quantities are given together in the tabulation. Also given are the vectors which describe the geometrical circumstances at the time of observation. These observations are of value not only from the standpoint of the physics of comet tails but also in computing the velocity of the solar wind and/or for testing models of the interplanetary plasma.