Page:Field Book of Stars.djvu/154

132 There are, besides the meteors that have been classified, certain shooting-stars that apparently have no determined radiant point. These are called sporadic meteors.

In these lists of meteors, the radiant point is only approximately given; for scientific purposes a far more exact position is required in terms of right ascension and declination. There are several good lists of meteoric showers to be obtained, which afford this information for those who care to pursue the matter more in detail. See the Rev. T. W. Webb's book, entitled Celestial Objects for Common Telescopes. For purposes of identification, the radiant points here given will be found for the most part sufficient.