Abstract
THE leader sunspot of the extensive group, visible from July 22 until August 4, has returned to view, the following component having in the meantime disappeared. The area of this leader spot was about 1000 millionths of the sun's hemisphbe seen with the naked eye. Tere on August 20, and on the following day, although the spot was not very far on the disk, it could he date of central meridian passage is August 25–3, and the sun's west limb will be reached on August 31. Since the spot is situated in fairly high latitude (33° north), its drift backwards in longitude is very marked as compared with the angular rotation of the standard meridian (Carring-ton's) used in computing sunspot positions and which is given by the mean of sunspots in solar latitude 15°-16° north and south.
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Return of a Large Sunspot. Nature 140, 358 (1937). https://doi.org/10.1038/140358b0
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DOI: https://doi.org/10.1038/140358b0