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
29Mar2017 15:53:05 PDT	sun	236.7	40.3	149398	1.00	0.0	40.3
29Mar2017 15:53:05 PDT	moon	208.4	57.4	359	0.05	25.0	40.3
29Mar2017 15:53:05 PDT	mercury	225.7	57.6	142660	0.51	18.7	40.3
29Mar2017 15:53:05 PDT	venus	249.3	36.4	42570	0.02	10.6	40.3
29Mar2017 15:53:05 PDT	mars	197.3	67.9	331935	0.96	34.8	40.3
    

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


% sl_smrs 37.8 -122.4
29Mar2017:
Sunrise:  06:59 PDT (84.8°)
Sunset:   19:30 PDT (275.4°)
Moonrise: 08:16 PDT (81.0°)
Moonset:  21:36 PDT (282.1°)
    

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