sightliner - find sight lines for the sun and moon

Not quite released yet.

Here are the current positions of the celestial objects, above the horizon as seen from San Francisco:


% sl_data -planets -num 1 37.8 -122.4 | sl_find 'elev>0'
# datetime		object	bearing	elev	dist	full	sunsep	sunelev
02Sep2014 07:07:05 PDT	sun	83.5	4.3	150934	1.00	0.0	4.3
02Sep2014 07:07:05 PDT	venus	86.2	18.0	247632	0.97	13.9	4.3
02Sep2014 07:07:05 PDT	jupiter	91.9	32.8	917698	1.00	29.5	4.3
    

Here are today's sun/moon rise/set times and bearings for San Francisco:


% sl_smrs 37.8 -122.4
02Sep2014:
Sunrise:  06:41 PDT (79.5°)
Sunset:   19:37 PDT (280.3°)
Moonrise: 14:22 PDT (113.7°)
Moonset:  none
    

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