The Night Sky in September
1937; Nature Portfolio; Volume: 140; Issue: 3539 Linguagem: Inglês
10.1038/140358c0
ISSN1476-4687
Tópico(s)Solar and Space Plasma Dynamics
ResumoON September 23 at llh U.T., the sun enters the sign Libra (the autumnal equinox). In the latitude of London, the night is then more than 4½hours longer than at the time of the summer solstice. The moon is new on September 4 at 22·9h and full (the Harvest Moon) on September 20 at 11·5h. Conjunctions with the planets take place as follows: with Venus on Sept. 2 at 3h; with Mercury on Sept. 6 at 5h; with Mars on Sept. 12 at 18h; with Jupiter on Sept. 15 at 6h and with Saturn on Sept. 21 at lh. An occultation of the star 5 ξ Sagittarii (magnitude 3·6) occurs on September 14, the disappearance being visible from Greenwich at 18h 37·5m. On September 24, Venus approaches the bright star Regulus. A close appulse of Mars to the 9th magnitude star C.D. 11856 will be visible from South Africa on September 7 at about 17·6h U.T. During the month, Finsler's comet in the constellation Virgo continues to move southwards. The following ephemeris is given by Dr. A. D. Maxwell's orbit of the comet:
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