Abstract
FULL moon occurs on Sept. 7d. C9h. 59m., U.T., and new moon on Sept. 22d 12h. 21m. The following conjunctions with the moon take place: Sept. 3d, 04h., Jupiter 5° N. ; Sept. 18d. 22h., Mars 4° S. ; Sept. 21d. 02h., Saturn 2° S. ; Sept. 23d. 17h., Mercury 4° S.; Sept. 25d. 10h., Venus 1° N.; Sept. 30d. 10h., Jupiter 5° N. Mercury is an evening star during the first part of the month and later becomes a morning star, but is too close to the sun for favourable observation. Venus sets about an hour after the sun and can be seen in the western sky, stellar magnitude - 3.5, the visible portion of the illuminated disk being between 0.790 and 0.707. Mars rises just after Ih. during the month and can be seen for a few hours before sunrise. Jupiter is visible in the earlier portion of the night, setting at Ih., 0h. and 23h., approximately, at the beginning, middle and end of the month, respectively ; the planet is stationary on Sept. 17. Saturn is in conjunction with the sun on Sept. 2 and cannot be observed. Occultations of stars brighter than magnitude 6 are as follows : Sept. 14d. 00h. 35.1m., 36 Tauri. (R) ; Sept. 16d. 00h. 05.3m., 136 Tauri. (R) ; Sept, 18d. 04h. 15.1m., ω Cane. (R). R refers to reappearance and the latitude of Greenwich is assumed. Autumnal equinox occurs on Sept. 23d. 09h.
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The Night Sky in September. Nature 164, 345 (1949). https://doi.org/10.1038/164345e0
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DOI: https://doi.org/10.1038/164345e0