Files *A.pdf are sets of all-sky maps for various latitudes. Each set is a sequence of five maps showing the sky for growing detection limits. The detection limit depends on the sky luminance, which is much larger in cities than in true nature. Star areas are proportional to their brightness.

The maps are computed assuming a chosen (quite common) attenuation of starlight by the atmosphere. The attenuation depends on the air transparency. The parameter of the chosen attenuation is such, that the stars are assumed to be attenuated by 0.25 mag when in zenith (so called zenith extinction). Then at 30° they are attenuated by 0.5 mag etc., depending on the amount of air between the observer and the star. With excellent transparency (zenith extinction of just 0.18 mag), starlight would be a lot stronger near horizon.

The limit given in the right bottom corner is for the faintness of the starlight as attenuated by the atmosphere, for the stars as they appear.

	Name	Last modified	Size	Description
	Parent Directory		-
	grey/	2010-12-02 17:20	-
	grey_fromPS/	2010-11-17 13:24	-
	single/	2011-02-20 23:46	-
	0.htm	2010-12-19 13:58	2.1K
	20.htm	2010-12-19 13:58	2.1K
	40.htm	2010-12-19 13:58	2.1K
	50.htm	2010-12-19 13:58	2.1K
	10.htm	2010-12-19 13:58	2.1K
	60.htm	2010-12-19 13:58	2.1K
	30.htm	2010-12-19 13:58	2.1K
	20s.htm	2010-12-19 13:58	2.1K
	30s.htm	2010-12-19 13:58	2.1K
	40s.htm	2010-12-19 13:58	2.1K
	50s.htm	2010-12-19 13:58	2.1K
	10s.htm	2010-12-19 13:58	2.1K
	60A.pdf	2010-11-01 13:59	140K
	40A.pdf	2010-11-01 13:59	140K
	50A.pdf	2010-11-01 13:59	141K
	30A.pdf	2010-11-01 13:59	144K
	20A.pdf	2010-11-01 13:59	145K
	10A.pdf	2010-11-01 13:59	147K
	0A.pdf	2010-11-01 13:59	152K
	10sA.pdf	2010-11-01 13:58	156K
	20sA.pdf	2010-11-01 13:58	158K
	30sA.pdf	2010-11-01 13:58	161K
	40sA.pdf	2010-11-01 13:58	163K
	50sA.pdf	2010-11-01 13:58	163K
	60.pdf	2010-10-27 12:07	166K
	50s.pdf	2010-10-27 12:07	188K
	50.pdf	2010-10-27 12:07	199K
	40s.pdf	2010-10-27 12:06	209K
	40.pdf	2010-10-27 12:07	210K
	30s.pdf	2010-10-27 12:06	220K
	30.pdf	2010-10-27 12:07	221K
	20s.pdf	2010-10-27 12:06	228K
	20.pdf	2010-10-27 12:07	232K
	10s.pdf	2010-10-27 12:06	233K
	10.pdf	2010-10-27 12:07	242K
	0.pdf	2010-10-27 12:07	245K
	allMar2grey.zip	2010-12-02 16:40	470K	Orion and around
	allsingle.zip	2011-01-06 21:30	2.2M
	allMar2.pdf	2010-10-27 12:11	2.5M	Orion and around
	allpdf.zip	2010-12-18 16:05	4.1M	indiv. latitude maps