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
22Dec2014 03:21:17 PST	jupiter	165.1	66.4	696005	0.99	128.2	-46.6
    

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


% sl_smrs 37.8 -122.4
22Dec2014:
Sunrise:  07:22 PST (119.5°)
Sunset:   16:54 PST (240.4°)
Moonrise: 07:41 PST (113.4°)
Moonset:  18:07 PST (247.2°)
    

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