Abstract
ALL that was stated positively in the note on M. Baldet's diameter of the new planet was that his conclusion that its diameter was only 1500 km. if its albedo was taken as 0.15 was erroneous. His present note is in full accord with that statement, since he now gives, in Comptes rendus for April 7, a diameter of 2500 km., taking the albedo equal to that of Neptune; that would give 5000 km. with an albedo 1/4 that of Neptune.
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The New Planet. Nature 125, 672 (1930). https://doi.org/10.1038/125672b0
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DOI: https://doi.org/10.1038/125672b0
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