The perturbations of the Bielid meteors
In the calculations, the results of which are embodied in this paper, it is assumed that in the apparition of the Bielid Meteors noted in November, 1885, we have an observation of the main part of the stream. It is also assumed that the periodic time of the stream is 6⅔ years, as appears to be now the general opinion of the chief authorities on the subject, and which agrees closely with the periodic time found for the associated comet. On these assumptions we ought again to encounter the central part, or at least a neighbouring segment of the stream, close to the central part, in November of the present year. It accordingly became a matter of interest to determine the perturbations to which the segment of the meteor stream, encountered in November, 1885, has been subjected in the interval, in order to ascertain the possibility or otherwise of an encounter with the same segment next November, especially as it was known that this segment of the stream was in close proximity to Jupiter during 1900-01.