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
05Mar2015 18:25:58 PST	venus	257.2	25.3	203172	0.85	31.1	-4.5
05Mar2015 18:25:58 PST	mars	258.9	20.0	337670	0.98	25.6	-4.5
05Mar2015 18:25:58 PST	jupiter	94.1	34.5	667886	1.00	149.1	-4.5
    

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


% sl_smrs 37.8 -122.4
05Mar2015:
Sunrise:  06:36 PST (97.0°)
Sunset:   18:07 PST (263.2°)
Moonrise: 18:24 PST (86.7°)
Moonset:  06:24 PST (275.5°)
    

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