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http://www.wro.org/ras/m111/newsletters/mike_allen.htm.
http://www.wro.org/ras/m111/newsletters/mike_allen.htm.
1. Under a Dog Day Sky August 1999
... Hazy skies usually mean steady skies, and steady air is just what the doctor ordered for observing planets and double stars. Mars is well past opposition and becoming less an item of interest as it shrinks in size, but Jupiter and Saturn are well placed in the early morning August sky. ... Their magnitudes are 4.2 and 6.0. ... It has an easily observed 10.6 magnitude central star. ... Cygnus is also host to a lot of small open star clusters that stand up to inspection under hazy skies. ...
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Ссылки http://www.wro.org/ras/m111/newsletters/mallen_aug99.htm -- 28.7 Кб -- 18.08.2005
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